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U.S. GEOLOGICAL SURVEY SAUDI ARABIAN MISSION TECHNICAL RECORD 17 (INTERAGENCY REPORT 372) IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz Y. Bagdady, Clay M. Conway, and Abdul Malik Helaby U.S. Geological Survey Open-File Report §£ /% This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards. U.S. Geological Survey Jiddah, Saudi Arabia 1981

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Page 1: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

U.S. GEOLOGICAL SURVEY

SAUDI ARABIAN MISSION

TECHNICAL RECORD 17

(INTERAGENCY REPORT 372)

IRON SULFIDE DEPOSITS AT WADI WASSAT,

KINGDOM OF SAUDI ARABIA

by

Ralph J. Roberts, Darwin L. Rossman,

Abdulaziz Y. Bagdady, Clay M. Conway, and Abdul Malik Helaby

U.S. Geological Survey Open-File Report §£ /%

This report is preliminary and has not been reviewed for conformity with U.S. Geological Survey editorial standards.

U.S. Geological Survey Jiddah, Saudi Arabia

1981

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The work on which this report was based was performed in accordance with a cooperative agreement between the U.S. Geological Survey and the Ministry of Petroleum and Mineral Resources.

The report has not been edited or reviewed for conformity with U.S. Geological Survey standards and nomenclature. Product names used in this report are for descriptive purposes and in no way imply endorsement by the U.S. Geological Survey.

The quadrangle identification method used in U.S. Geological Survey Saudi Arabian Mission reports is shown below.

41°23°

41°

23/41

1 -degree quadrangle

23/41 B

30-minute quadrangle

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CONTENTS

Page

ABSTRACT............................................... 1INTRODUCTION........................................... 2

Location........................................... 2Previous work...................................... 2Present investigation .............................. 4

GEOLOGY OF THE WADI WASSAT AREA........................ 4Introduction....................................... 4Sedimentary, pyroclastic, and volcanic rocks....... 5

Mahal formation ............................... 7Wassat formation .............................. 7Duwayr formation .............................. 8

Intrusive rocks.................................... 8Dike rocks .................................... 9

Alluvium........................................... 9STRUCTURE.............................................. 9IRON SULFIDE DEPOSITS.................................. 12

Introduction....................................... 12Origin of the deposits at Wadi Wassat.............. 15Sampling program................................... 19Description of the deposits........................ 21

Area A gossan ................................. 21Drill hole WS-1.......................... 21Drill hole WS-5.......................... 25

Area B gossan ................................. 25Drill hole WS-3.......................... 25Drill hole WS-4. ......................... 32

Area C........................................ 32Area D........................................ 32Area E........................................ 32

Drill hole WS-7.......................... 36Area F........................................ 36

Drill hole WS-6.......................... 36Area G gossan ................................. 36Area H gossan ................................. 36

Drill hole WS-8. ......................... 41Area I gossan ................................. 41

Drill hole WS-9.......................... 41Area J gossan ................................. 48Area K gossan ................................. 48Area L........................................ 48

Geochemistry....................................... 48Results of analytical work.................... 49

Resources.......................................... 49REFERENCES CITED....................................... 52

ill

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APPENDIX 1.

2.

Gossan sample areas, sample numbers,and assays.............................

Diamond drill hole data, list of samples, and assays of core samples.............

Page

55

90

Plate

ILLUSTRATIONS [Plate is in pocket]

Geologic map of Wadi Wassat iron sulfide deposits

Figure 1. Index map showing location of iron sulfidedeposits at Wadi Wassat................... 3

2. Generalized geologic map showing trace ofthe mineralized zone ...................... 6

3. Detailed map showing structure in the vicinityof drill holes WS-6, -7, and -8........... 11

4. Geologic map of thrust fault zone neardrill hole WS-9........................... 13

5. Photographs and photomicrographs ofsulfide ore ............................... 16

6. Cross sections along drill holes WS-1, -5,-3, -4, -6, -7, -8, and -9................ 22

TABLES

Table 1. Summary of analytical results from 272gossan samples............................ 20

2. Depth of oxidation in the area.............. 213. Summary log of drill hole WS-1.............. 244. Analyses of core from drill hole WS-1....... 265. Summary log of drill hole WS-5.............. 276. Analyses of core from drill

hole WS-5................................. 287. Major element chemical analyses of core

from drill hole WS-5...................... 298. Summary log of drill hole WS-3.............. 309. Analyses of core from drill hole WS-3....... 3110. Summary log of drill hole WS-4.............. 3311. Analyses of core from drill hole WS-4....... 3412. Major element chemical analyses of core

from drill hole WS-4...................... 3513. Summary log of drill hole WS-7.............. 3714. Analyses of core from drill hole WS-7....... 3815. Summary log of drill hole WS-6.............. 39

IV

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Page

1G. Analyses of core from drill hole WS-6....... 4017. Summary log of drill hole WS-8. ............. 4218. Analyses of core from drill hole WS-8....... 4319. Major element chemical analyses from

drill hole WS-8........................... 4420. Summary log of drill hole WS-9.............. 4521. Analyses of core from drill hole WS-9....... 4622. Major element chemical analyses of core

from drill hole WS-9....................... 4723. Distribution of pyrite and pyrrhotite in

drill holes WS-1 through WS-9............. 50

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IRON SULFIDE DEPOSITS AT WADI WASSAT,

KINGDOM OF SAUDI ARABIA

by

Ralph J. RobertsjL/ , Darwin L. Rossman^/, Abdulaziz Y. Bagdady, Clay M. Conwayl/, and

Abdul Malik Helaby

ABSTRACT

Massive and disseminated iron sulfide deposits in Wadi Wassat form lenticular, stratabound deposits in cherty Precambrian sedimentary rocks interlayered with Precambrian calcareous sedimentary rocks, pyroclastic rocks, and an- desitic flow rocks. These rocks have been cut by a wide variety of plutonic and dike rocks including gabbro, diorite, granodiorite, diabase, rhyolite, and granite.

The zone containing the sulfide lenses is nearly 16 km long and is cut off by granitic rocks at both the northern and southern ends. The lenses are as much as 200 m thick; one can be traced along strike for more than 4 km. The lenses consist mostly of iron sulfides. Pyrite is the principal sulfide mineral; near intrusive bodiesj the pyrite has been partially converted to pyrrhotite and locally mobilized into fractures. The sulfides have been oxidized to a depth of about 25 m.

Preliminary calculations indicate that about 107,500,000 tons of sulfides, averaging 40 percent iron and 35 percent sulfur, are available to a depth of 100 m. Small amounts of nickel, cobalt, zinc, and copper are also present, but at metal prices prevailing in early 1981, these do not con­ stitute significant resources.

I./ U.S. Geological Survey, Menlo Park, California, U.S.A 2/ U.S. Geological Survey, Reston, Virginia, U.S.A.

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INTRODUCTION

Location

The Wadi Wassat iron sulfide deposits are located in the southwestern part of the Kingdom of Saudi Arabia, in the Wadi Wassat quadrangle (sheet 18/44 C) , which is between lat 18°00' and 18°30'N., long 44°00' and 44°30'E., (fig. 1). The deposits crop out in Wadi Wassat, which drains northeast into the Rub al Khali; ridge-top altitudes are about 1,400 m above sea level .

The area can be reached by an unimproved road that ex­ tends from Bishah via Tathlith about 460 km southwestward to Najran. The area is 330 km southeast of Bishah and 130 km north of Najran; B'ir Idimah, the only permanent settlement in the area, is located about 30 km north of the deposit.

Previous work

The Wadi Wassat quadrangle was first mapped as part of the 1:500,000-scale Asir quadrangle by Brown and Jackson (1959). The first mineral exploration in the Wadi Wassat area was carried out by Hatem El-Khalidi of the Arabian Shield Development Company, a division of Dallas Resources Incorporated, who discovered the gossan at Wadi Wassat in October 1964. In the subsequent 3 years, W.C. Overstreet and others conducted studies of the economic geology along a series of traverses through the region (Overstreet 1968v 196#fei, &, i; Overstreet and others, 196?a, Overstreet and others, 196ty>; Overstreet and others, 1967b; and Overstreet and others, 1967£) .

Overstreet and Rossman (1970) carried on reconnaissance geologic mapping (scale 1:100,000) in the greater Wadi Wassat region, and Rossman mapped the gossan area in Wadi Wassat at a scale of 1:10,000 (written commun., 1967) This work was followed by electromagnetic ground geophysical studies (Alien and Davis, 196^a, b; Akhrass, 1966). In 1967-1969 a diamond drilling program was carried out under the supervision of Overstreet, Rossman, and Martin; nine holes totaling 1,100 m in length were completed. Martin (1973) also continued de­ tailed mapping in the area during 1968-1969.

During the late stages of the exploratory work, A.E. Weissenborn and R.L. Earhart visited the Wadi Wassat area and prepared a summary appraisal and an estimate of the resources in the deposits (Weissenborn and Earhart, 196^).

In 1968-1969 Barry Jackaman carried on detailed geologic studies in Wadi Wassat (1972). Greenwood (1980) mapped the Wadi Wassat quadrangle at a scale of 1:100,000.

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36

16

36'

Figure 1.- Index map showing location ofWassat quadrangle, Kingdom of Saudi Arabia.

3

Wadi Wassat, Wadi

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Present investigation

This study is part of a broad program of mineral ex­ ploration conducted by the U.S. Geological Survey (USGS) in accordance with a work agreement with the Ministry of Petroleum and Mineral Resources, Kingdom of Saudi Arabia.

The objectives of the present study were to remap the gossans and adjacent host rocks in Wadi Wassat, resample mineralized zones, and evaluate the potential of the area for base metal and nickel deposits. Roberts and Bagdady were in the field from 13 March to 9 April 1975, revising the geologic map near the gossans and resampling some gossans. Helaby relogged the drill cores and supervised resampling of the cores. Conway spent a week with Roberts in 1977 assisting in evaluation of stratigraphic and structural features.

This report incorporates material from a draft initially prepared by Rossman that was revised and modified by W.C. Overstreet in 1972. Summary logs of drill holes and analy­ tical data initially compiled by Rossman are included in this report.

The writers gratefully acknowledge support and helpful cooperation received from H.E. Ghazi H. Sultan, Deputy Minister for Mineral Resources, and other officials of the Directorate General of Mineral Resources (DGMR). Appreci­ ation is also extended to K.J. Curry and chemists of the USGS-DGMR Chemical Laboratory for detailed analyses of samples and to Mohammed Naqvi for spectrographic studies of mineralized rock. Ghanim Jeri al Harbi, Merdhi al Mutairi Almotteir, Saud Mulish Alshabani, and Mugeeth Abdullah Algahtani assisted in the field studies. J. Matzko and M. Ma wad supervised preparation of polished specimens and photo­ graphed the sulfides and rocks. T. Hopwood, consultant for Riofinex Limited, contributed useful structural and strati- graphic information .D.LSchmidt assisted Roberts and Conway in evaluating stratigraphic and structural features.

R.M. Nixon conducted surveys that tied the area into the Saudi Arabian national geodetic net; F.J. Fuller and D.J. Faulkender calculated the latitude and longitude of a station within the mapped area; Faulkender also calculated the area of the gossan for resource computations.

GEOLOGY OF THE WADI WASSAT AREA

Introduction

The geology of the Wadi Wassat quadrangle was first de­ scribed by Overstreet and Rossman (1970); they assigned the

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rocks in the area to an unnamed Precambrian sequence of un­ met amorphosed to metamorphosed interlayered volcanic and sedimentary rocks. Jackaman (1972) later divided these rocks into three units, the Duwayr group, the Wassat group, and the Mahal group. He placed the contact between the Duwayr and Wassat groups 50-200 m east of the principal iron sulfide- bearing unit. This contact is a distinctive lithologic break, and we have followed Jackaman's usage.

Greenwood (1980) combined Jackaman's (1972) Duwayr group, Wassat group, and the eastern part of the Mahal group into a redefined Wassat formation and renamed the western part of Jackaman's Mahal group as the Qatan formation. He placed these two formations in the Jiddah group. We prefer to fol­ low the nomenclature of Jackaman, which is based on detailed studies and has priority. However, in keeping with Article 9 of the Code of Stratigraphic Nomenclature (Cohee, 1974), which requires that a group contain two or more formations, we recommend that Jackaman's units be reduced to formational status: that is, Wassat, Duwayr, and Mahal formations.

While resampling was being done in the Wadi Wassat dis­ trict during early 1975, the gossans and immediately adjacent wall rocks were remapped in places. During the course of this work, several observations of graded bedding and truncated beds in the upper part of the Wassat formation (near point a on fig. 2, approximate lat 18°22'N., long 44°13'E.) indicated that the Stratigraphic tops of beds are to the east. These observations were confirmed by T. Hopwood (oral commun., 1978), who measured cleavage intersections with bedding in the Wassat and adjacent Duwayr formations in the same area. Therefore, the Duwayr formation is apparently the youngest rather than the oldest of the three formations in the area. In addition, bedding and foliation attitudes and truncated beds near point b on figure 2 suggest that the iron sulfide unit is folded into an anticline-syncline pair that plunges steeply south. The positions of the syncline on the west and the anticline on the east also indicate that the Stratigraphic tops are to the east. So, although we accept Jackaman's (1972) formations, their order in the following account will be reversed to reflect our understanding of their relative ages.

Sedimentary, pyroclastic, and volcanic rocks

The sedimentary, pyroclastic, and volcanic rocks that contain the iron sulfide-bearing beds in the Wadi Wassat area were divided by Jackaman (1972) into three units: a unit of sedimentary and pyroclastic rocks (Mahal formation); a unit of sedimentary, pyroclastic, and volcanic rocks containing iron sulfide-bearing layers (Wassat formation); and a unit of pyroclastic and volcanic rocks (Duwayr formation) .

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SA(IR)-372

EXPLANATION

Alluvium

Granitic rocks

Diorite

Duwayr Formation

' Wassat Formation (gossan zone (g) near top of unit)

Mahal Formation

Contact _ dashed where approximately located; dotted where concealed

Fault _ dashed where approximately located; dotted where concealed; arrows show relative displacement

Thrust fault _ dashed where approximately located; dotted where concealed

18 22'

Figure 2.- Generalized geologic map showing trace of the mineralized zone. Capital letters refer to gossan areas as described in text; roman numerals indicate ore zone segments, a. Area of east-facing beds in upper part of Wassat formation and lower part of Duwayr formation, b. Syncline in Wassat formation.

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The sedimentary and volcanic rocks in Wadi Wassat were regionally metamorphosed to greenschist facies and are now characterized by sericite, chlorite, epidote, and locally graphite. In places, biotite schist and hornblende schist have formed in areas adjacent to or near plutonic rocks.

Mahal formation

The Mahal formation consists of andesitic pyroclastic rocks, rhyodacitic tuff, wacke, and minor amounts of marble (Jackaman, 1972). This unit ranges from 500 to 2,000 m thick and underlies the western part of the area 2>h?£.<j*^ on the plate. It is well exposed on the margins of Wadi Mahal, where it crops out in subparallel north-trending strike ridges. The upper beds of the Mahal formation grade into the overlying Wassat formation.

Locally, the Mahal formation contains lenses of iron sul- fide minerals that are now oxidized to gossans at the sur­ face. These lenses are thin, ranging from less than a meter to as much as 5 m^/cA<)verstreet and Rossman (1970, pi. 1) noted the presence of similar sulfide-bearing beds west of the mapped area and in other parts of the Wadi Wassat quadrangle .

Wassat formation

The Wassat formation comprises interlayered sedimentary, pyroclastic, and volcanic rocks, and iron sulfide-bearing units, which were estimated by Jackaman (1972) to aggregate as much as 5,000 m in thickness in the mapped area (plate). The thick volcanic and pyroclastic units of the lower and middle parts of the formation form bold outcrops in the rug­ ged upland between Wadi Mahal and Wadi Wassat. The iron sulfide-bearing units in the upper part generally weather readily to iron oxide gossans, forming valleys in most places; some siliceous gossans crop out as prominent ridges.

The lower beds of the Wassat formation include interbed- ded wacke, sandstone, siltstone, impure limestone, and tuff- aceous rocks. The middle part includes pyroclastic rocks, volcanic flows, and some coarse clastic units; the pyro­ clastic rocks include interlayered tuff, breccia, and locally thick agglomerate. The upper part contains some thin andesitic flows, pyroclastic rocks, and calcareous tuff, which are capped by laminated pyritic chert and tuff and intercalated iron sulfide lenses, now altered to gossan. The gossans crop out in a zone that is as much as 560 m wide. The gossans consist of iron oxides and secondary silica interlayered with laminated tuff, cherty tuff, and volcanic wacke; intertonguing calcareous tuff and impure marble are present locally.

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The middle unit of the Wassat formation contains coarse-grained clastic beds that suggest a high-energy en­ vironment. However, the middle unit also contains inter­ calated marble and tuff units that indicate accumulation in a lower energy subaqueous environment. In the higher beds of the middle unit and in the upper unit, more abundant, thinly laminated beds, as well as some pyritic beds, suggest depo­ sition under progressively lower energy conditions, possibly in a deepening basin. These transitions form a logical sequence in sedimentation and reinforce the conclusion that the uppermost beds in the Wassat formation are in the eastern part of the outcrop zone.

The final sedimentation phase of the Wassat formation was deposition of the principal sulfide-bearing beds and associ­ ated thinly laminated tuffaceous and calcareous rocks. Dur­ ing this phase, little clastic material was furnished to the basin of accumulation, and iron sulfides were deposited from solutions of volcanogenic origin. The sulfur in these sul- fides is characterized by large negative 6 34S values, indicating deposition in a euxinic environment (R.O. Rye, written commun., 1978).

Duwayr formation

The Duwayr formation (Jackaman, 1972) comprises flows of andesite, basaltic andesite, basalt, and rhyodacite, inter- layered with minor andesitic pyroclastic rocks and wacke.

Jackaman reported that the volcanic flows are mostly basaltic andesite in composition, which he plotted in the alkali olivine basalt field of Kuno (1966); these flows range from one meter to as much as 300 m in thickness and commonly show well-developed flow structures. Jackaman suggested that these flows accumulated partly in a subaerial environment; however, the widespread distribution of associated well- bedded sedimentary wacke indicates that much of the depo­ sition took place subaqueously.

Intrusive rocks

The sedimentary and volcanic rocks in the Wadi Wassat area are truncated both on the north and south by plutonic rocks that range in composition from gabbro to granite. In addition, numerous dikes obliquely transect the rocks of the district (Overstreet and Rossman, 1970; Jackaman, 1972). The oldest intrusive rock is diorite, which is associated with gabbro and granodiorite, followed by biotite granite and a variety of dikes.

The diorite is a fine- to medium-grained, dark-gray rock

8

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that locally grades into gabbro and granodiorite. It con­ tains biotite and locally contains hornblende; in places it is distinctly foliated. Along contacts with metavolcanic and metasedimentary rocks, a hornfels or tactite zone, 10-50 m wide, has developed; pyrite along the contact is locally converted to pyrrhotite. The diorite weathers to smooth slopes with poorly exposed outcrops.

The biotite granite is medium to coarse grained, massive, and equigranular. Near the granite, the calcareous beds were metamorphosed to garnet-diopside rock, and the andesite to biotite schist and hornfels. The granite weathers to promi­ nent spheroidal boulders characterized by caves, spires, and bridges.

Dike rocks

Many kinds of dike rocks have been mapped in the Wadi Wassat area. Only the more abundant types will be mentioned here.

Diorite dikes occur along the margins of diorite plutons in the northwestern part of the district. These dikes are cut by granodiorite and granite dikes that strike northwest, north-northwest, and northeast, and by felsite (rhyolite?) dikes that mostly strike north.

The rhyolite dikes and the older dikes are cut by younger diabase dikes that mostly trend northwest, but also trend north and northeast. Northwest-trending syenite porphyry dikes were reported by Overstreet (1966d) in the northern part of the area. Diabase dikes are abundant throughout the area mapped on the plate.

Alluvium

Deposits of Quaternary alluvium in the area include eolian silt, sand, and gravel on pediments and wadi floors. The gravel and sand are mostly unconsolidated, but in places they are cemented by secondary iron oxides and caliche and form a crust that is mapped separately. Talus deposits man­ tle some slopes, especially those below prominent exposures of dikes and silicified rock associated with gossans.

STRUCTURE

The Wadi Wassat iron sulfide deposits are in a north- trending belt of rocks that has been intruded by granitic rocks and complexly folded and faulted. Two kinds of folds have been mapped, major folds and minor folds superimposed on

9

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the major folds. The major folds are best delineated by iron sulfide lenses that outline the folds and can be easily traced. Those mapped in the Wadi Wassat area average about 300 m in amplitude.

For convenient description, the sulfide bodies in the map area were divided into four segments (fig. 2). At the northern end of the mapped area, the iron sulfide deposit is truncated by granite. The deposit then extends southward for 8 km (segment I), and turns abruptly in a northwest direction for about 3 km (segment II); thereafter, it turns sharply to the south again for 2.5 km; then it continues to the west for 2 km (segment IV) and butts into granite. These segments were further subdivided into areas (A through K) for purposes of discussion and resource calculations (appendix 1).

Segment I strikes north and generally dips east, 60°-85°, though local overturns were noted. The gossan is nearly con­ tinuous over this entire segment except for a 1-km gap be­ tween Areas D and E. At Area E the gossan is exceptionally wide (560 m). This great width is apparently caused by tight parallel folds (fig. 3). Continuing south, past drill hole WS-6, the iron sulfide unit crops out in two parallel belts that may represent two layers or a single folded layer. At the southern end of the segment, the strata turn to strike east-west, then are offset by a north-trending, right-lateral fault. The east-west turn may be a result of drag on the fault or possibly part of an anticlinal fold (fig. 3). In order to clarify these structural features, segment I should be mapped in greater detail.

Segment II strikes northwest and dips mostly to the southwest, though interruptions in the iron sulfide bed suggest local complications due to folding and faulting. Much of the ore zone in this area is covered by alluvium and iron oxide crust, and the details of folding and faulting were not worked out. East of drill hole WS-9, cherty and tuffaceous beds strike northeast, and their dip is steep to vertical; this structure implies a local cross fold. South of drill hole WS-9, calcareous beds overlying the iron sulfide unit form a broad synclinal fold on which are superposed minor folds and lineations that plunge 20°-45°. Though the gossan unit at drill hole WS-9 is interrupted by diorite, it appears to lie in a parallel synclinal fold.

Segment III continues south as a series of lenses, inter­ rupted locally by granitic bodies and alluvial cover. The lenticularity may be partly a result of folding and partly due to original deposition in lens-shaped bodies. In the wide gap betweeen segments III and IV, the sulfide-bearing zone appears to grade into a cherty tuff unit containing dis­ seminated pyrite. This unit has an iron-stained surface

10

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SA(IR)-372EXPLANATION

Alluvium

r Granitic rocks, rhyolitic (r)

Diorite

Duwayr Formation

-g Wassat Formation, gossan (g)

Con tact dotted wh^re concealed F&ult-dashed where approximately

located; dotted where concealed Fold axis dashed where approximately

located; dotted where concealed, queried where doubtful

Plunge of minor fold Anticline

Syncline

Strike and dip of bedding

Vertical bedding

Overturned bedding

Drill hole

Figure 3.- Detailed map showing structure in the vicinity of drill holes WS-6, -7, and -8.

11

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exposure that gives way at a depth of a few centimeters to pyrite disseminations in the cherty host rock.

The iron sulfide unit in Segment IV is intricately broken by intrusive bodies and furnishes little structural information. In several places, however, upright dips to the south were recorded; these are consistent with observations of stratigraphic tops elsewhere in the mapped area.

The folds in the Wadi Wassat area show two major patterns. The right-lateral sense of the large folds in segment I near drill hole WS-7 is consistent with right- lateral movement on north-trending faults of regional extent (Overstreet, 1968<l; Greenwood, 1980). The fold(?)-fault intersection at the southern termination of Area G may have been caused by similar forces.

The broad synclinal fold near drill hole WS-9 lies in a distinctly different setting. The core of the fold contains diorite and granite, and the gossan zone is separated from beds to the north by a postulated fault zone. Some faults in this area were thought by Overstreet (1960ci) to be thrusts formed during the emplacement of intrusive rocks; however, he did not show any thrusts on his geologic map. Jackaman (1972) and Greenwood (1980) advanced similar suggestions. Roberts mapped the area in some detail; his map shows a clear-cut arcuate break between two blocks of contrasting structure (fig. 4). A reasonable structural interpretation of this complex knot is that the two blocks are separated by a thrust fault that dips south at a low angle. Much of the thrust zone is now occupied by dioritic and granitic rocks. These rocks occupy the greater part of the syncline and their emplacement is considered to be the principal force in development of the syncline and associated thrust fault.

In order to completely understand the structure of this block, it should be mapped at a much larger scale so that all significant structural features can be plotted and evaluated.

IRON SULFIDE DEPOSITS

Introduction

Iron sulfide deposits in Wadi Wassat occur in a sedimentary sequence in the upper part of the Wassat formation. This sedimentary sequence includes laminated volcanic ash, cherty tuff, and calcareous slate and tuff. This sequence is as much as 300 m thick but locally pinches out completely along strike. The iron sulfides, mainly pyrite, pyrrhotite, and marcasite, are disseminated throughout the beds and locally form massive lenses along bedding. In places, chalcopyrite and sphalerite grains are scattered sparsely throughout the iron sulfides.

12

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Pyrite is the principal sulfide mineral at Wadi Wassat (Overstreet and Rossman, 1970; Jackaman, 1972). It occurs in four generations; three of these are primary, and the last is supergene: I, early cubic to anhedral pyrite that occurs mainly along bedding; II, later coarse-grained pyrite that occurs as metacrysts in pyrrhotite; III, veinlets of late pyrite that cut pyrites I and II; and IV, supergene pyrite associated with marcasite in the oxide zone.

The earliest primary pyrite is present as euhedral to anhedral grains and forms layers that commonly are parallel with laminations in the tuff (fig. 5A) . Jackaman (1972) showed that this pyrite mimics bedding and graded bedding. Most grains are equidimensional and range from 50 to as much as 600 microns in diameter (fig. 5B); a few are elon­ gate due to postdepositional shearing.

Pyrite of generation II formed as metacrysts in pyrrho­ tite; the most characteristic habit is large cubic crystals as much as 1 cm in diameter. These crystals show skeletal growth on their margins and have replaced the pyrrhotite (fig. 5C) . Pyrrhotite is a metamorphic facies of pyrite that is best developed in zones of contact metamorphism. The pyrrhotite is present as anhedral grains that have rag­ ged boundaries in contact with silicate gangue minerals.

The youngest primary pyrite (III) is present in frac­ ture zones and veinlets that cut the older pyrrhotite and pyrite. It is commonly anhedral and is associated with quartz and other gangue minerals (fig. 5D) .

The supergene pyrite (IV) and associated marcasite are mostly fine grained; they are present as concretionary masses and as disseminations in clay in the oxidized zone.

Gangue minerals in the iron sulfide bodies include chloritoid, sericite, biotite, tremolite, quartz, carbonate minerals, epidote, and zoisite. These commonly have re­ placed the pyrite along grain contacts, indicating that the pyrite developed prior to metamorphism.

The sulfide-bearing bodies at Wadi Wassat are lenticular, and they pinch and swell along strike. In the northern part of the mineralized zone (Segment I, fig. 2), the principal lens is about 3.3 km long and as much as 130 m thick. It consists of interlayered sulfide and silicate layers, as indicated in the logs of drill holes WS-1, -5, -3, and -4 (tables 3, 5, 8, and 10). Holes WS-3 and -4 intersected about 52 m of the ore zone that contains 80 percent or more of sulfide-bearing material.

14

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In the southern part of segment I the sulfide zone is as much as 560 m wide; this unusual width is thought to be a re­ sult of duplication on three or more parallel folds (fig. 3). In drill hole WS-7 (table 13), a cumulative thickness of 52 m contained 80 percent or more of sulfide-bearing material, the same thickness reported for drill holes WS-3 and -4. South of drill hole WS-7 the gossan belt gradually narrows and is less than 100 m wide at the southern end of segment I.

In segment II (fig. 2) the ore zone is poorly exposed. It has a maximum outcrop width of 300 m; however, it is com­ plexly broken by intrusive bodies and faults and may also be folded, so its true width is uncertain. In drill hole WS-8 (table 17) , about 107 m of sulfide-bearing material were intersected, of which 41 m contained more than 80 percent pyrite and pyrrhotite. Drill hole WS-9 (table 20) cut two sulfide-bearing zones containing a cumulative thickness of 16 m of 80 percent sulfide-bearing material, mostly pyrrhotite.

In segment III the ore zone is narrow, commonly less than 50 m wide, and discontinuous. In segment IV the zone is as much as 250 m wide, but is complexly cut by dioritic and granitic bodies and terminates against granite at its southern end .

Origin of the deposits at Wadi Wassat

The gossans of the iron sulfide deposits at Wadi Wassat were originally interpreted by Overstreet (1968<y p. 6), on the basis of anomalously high molybdenum content, to "have formed from high-temperature sulfide minerals, probably pyrite and pyrrhotite." Later, after a study of core samples from drill hole WS-1, Overstreet and others (196^a) concluded that the pyrite was of mixed sedimentary and replacement origin. Still later, Overstreet (196^6, p. 18) suggested that "the pyrite...was deposited as a hydrothermal re- placement mineral." Overstreet and others tl c/bj£s p. noted that "certain relict textures appear to be of syn- genetic sedimentary or sedimentary-volcanic origin... the Wadi Wassat massive sulfide deposit is obviously poly- genetic..." Overstreet and Rossman (1970, p. 51) reiterated "the concept of a metamorphosed syngenetic deposit... in and partly replacing a... sequence of sedimentary rocks of an- desitic composition and associated bedded volcanic rocks in the andesite sequence."

This concept of a metamorphosed syngenetic deposit was generally accepted by Jackaman (1972), with some modifi­ cations. Jackaman noted that the pyrite grains mimicked bedding structures such as layering and grading. He

15

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SA(IR)-372

Figure 5.- Photographs and photomicrographs of sulfide ore.A. Photograph showing layering in sulfide ore; dark layers are sulfides. B. Photomicrograph of early layered pyrite (p); light-colored layers are quartz

and silicate minerals.16

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SA(IR)-372

Figure 5.- Continued.C. Photomicrograph of metamorphosed pyrite and pyrrhotite: pyrite

metacrysts (p) have developed in a matrix of pyrrhotite (po) D. Latest pyrite (p) in veins that cut earlier sulfide and silicate minerals.

17

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pointed out that in part the pyrite enclosed original gangue material during growth and in part replaced the gangue. To explain this relationship, Jackaman postulated that the iron and base metals were derived from volcanic exhalations; the metals were thought to have been originally deposited as particles of oxides or hydroxides, then later sulfidized.

We argue that the sulfurization mechanism of Jackaman is improbable. The deposits are in fine-grained rocks that were probably deposited in a shallow to moderately deep aqueous environment (Goodwin, 1973); such rocks would have low permeability, thus inhibiting interstratal movement of solutions. If sulfurization had occurred, it seems likely that some remnants showing stages in the conversion process of oxides to sulfides would have remained. Such remnants have not been reported; therefore Roberts suggests that the iron sulfides were deposited mostly as syngenetic pyrite simultaneous with the deposition of associated siliceous sediments and tuffs. This suggestion is reinforced by the strongly negative sulfur isotope values in the pyrite (R.O. Rye, written commun., 1978)

Overstreet and others (1976, p. 104) considered the gen­ esis of the deposits from the viewpoint of their geochemis­ try. They determined the abundances of minor elements in sulfides from the core of drill holes WS-6 and -7 and found that (p. 104) "minor elements in the core... correlate posi­ tively with syngenetic sedimentary and volcanic deposits and negatively with deposits of hydrothermal, magmatic, and metamorphic origin... the deposit is here thought to be formed under marine volcanic-sedimentary conditions. 11

In view of the emphasis on replacement of groundmass minerals and rock fragments by pyrite (Overstreet and Rossman, 1970; Jackaman, 1972), it seems likely that the formation of the deposits involved more than simple sedimentary processes. The replacement could have been partly a diagenetic process, that is, recrystallization of constituents already present in the rock; it may also have included significant addition of iron sulfides from deep-seated sources, such as visualized by Roberts (1976) for sulfide deposits of dual origin, that is, dual syngenetic and epigenetic deposits found elsewhere in Saudi Arabia. The iron sulfides could have been derived from deep-seated igneous or fumarolic sources that continued to supply metals to the system long after burial .

The essential steps in the formation of the iron sulfide deposits at Wadi Wassat are visualized as follows:

1. Volcanism and sedimentation resulted in the accumu­ lation of pyroclastic, sedimentary, and volcanic rocks.

18

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Fine-grained, massive syngenetic pyrite was deposited in layers and pods during periods of slow accumulation of volcanic and clastic materials.

Analyses of sulfur isotope ratios in sulfides from Wadi Wassat by Rye and others (1979) show strongly negative

values (-15.3 to -30.5 permil), which indicate de­ position in a euxinic environment. The sulfur is considered by Rye to be largely derived from sea water sulfates.

2. Diagenetic alteration, including zeolitization, cem­ entation and other processes, of the pyroclastic and sedimen­ tary rocks followed. Some rearrangement of the iron sulfides probably took place at this time, leading to recrystal- lization and coarsening in grain size of the iron sulfides.

3. Possible late-stage introduction of iron sulfides and minor amounts of base metal sulfides from fluids of deep- seated (volcanogenic) origin also may have taken place (Corliss, 1971; Anderson and Halunen, 1974; McMurty and Burnett, 1975). Mauger (1972) has suggested that metals and sulfur in such deposits may be extracted from sediments by pore waters during compaction; the metal-bearing waters may move upward and deposit sulfides around submarine spring vents. Wright (1965) has also discussed the movement of metals through volcanic rocks.

4. Regional metamorphism and recrystallization of the rocks followed, favoring an increase in grain size of the pyrite and segregation into layers.

5. Finally, intrusion of diorite and granite bodies caused deformation, further recrystallization of pyrite to pyrrhotite , and mobilization of sulfides on a small scale.

Sampling program

In 1967 Rossman supervised the collection of about 1,200 gossan samples, of which 272 were analyzed in the USGS-DGMR Chemical Laboratory. The results of these analyses are sum­ marized in table 1.

In March and April 1975, the cores of drill holes WS-1 through WS-9 were resampled at 1-m intervals and reanalyzed. Also, about 450 surface samples were collected for comparison of the geochemistry of surface samples with those from the cores (appendices 1 and 2). Most of the samples have been analyzed for manganese, nickel, cobalt, copper, lead, zinc, silver, gold, molybdenum, and chromium to facilitate direct comparison of the results with samples from Wadi Qatan (Dodge and Rossman, 1975).

19

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Tabl

e 1. Su

mmar

y of

analytical

rcr,

ults

fr

om ;?

?,^

00:^-1*:,

rawp

ler,

, WaAi.

Vac sa

t[G

ossa

ns d

esignated

by le

tter

s, as a

n plate

1.

All

'results in

pa

rts

per mi

llio

n except silver-,

vdiich is

expressed in

oun

ces

[x?r

to

n.

Copper,

molybdenum,

and

x.in

c we

re a

naly

sed

chem

ical

ly,

silv

er

by ato

mic

absorption,

nickel a

nd c

obalt

by semiquantitative sp

ectr

ogra

phy.

-, in

dica

tes

not

anal

yzed

]

to o

Mean

High

Mean

Hi

gh

Valu

es

Mean

High

Mean

Hi

gh

Mean

High

Cu 25

115 10

10 10 18

60 37

150 24

150

Mo Gossan

4 40 Gossan

35

75 Gossan

15 Gossan

4 10 Gossan

11

40 Gossan

6 20

Zn L 30

22

50

Ag

Ni

samples

0 10

0

10

Co 10

10

K 3 sa

mple

s

16

250

10

0 10

10

10

J 1 sa

mple

25 I (SE

15

50 H 15

15

50

G--25

8 25

0 10

part) 5

samples

.04

.19

samp

les

.04

.09

samples

.01

.05

10 - - -

CuMo

Zn

Goss

an E

11

1

Mean

High

Mean

High

Mean

Hi

gh

Mean

Hi

gh

Mean

High

25

225 35

75 6 20 14

30 35

75

10

21

50

100

Goss

an

5 10

Goss

an

D--4

25

25

Ag

samples

.04

.04

samples

-

Ni 10

10 10

10

Co 10

10 10

10

C 16

samples

5 25

- 10

50

Gossan

7 115 Go

ssan

14

40

10

1010

10

B 25

samples

6 25 A 4

12

25

- samples

-

10

10 10

10

10

10 10

10

Bedded a

ndesitic tuff 11 samples

Mean

Hi

gh30

60

5 2025

25

-10

10

10

10

Mean

12

Goss

an F

(W part) 22 s

amples

5 5

.04

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Description of the deposits

The gossans of iron sulfide deposits in Wadi Wassat are discontinuously exposed along a sinuous zone having a total strike length of about 16 km and a width of as much as 300 m. The lack of continuity is due in part to faulting, in part to folding, and in part to alluvial cover. The depth of oxida­ tion in the district is variable, ranging from 16 m to 30 m.

Table 2. Depth of oxidation in the areaVertical depth

Drill hole Comment (in meters)

WS-1 Depth to sulfides 20WS-4 Depth to fresh bedded rock 16WS-6 Depth to massive sulfides 23WS-7 Depth to massive sulfides 17WS-8 Depth to unweathered bedded rock 17WS-9 Depth to fresh andesitic rock in

flank of hill 30

The gossans will be described, beginning in the northern part of the area and continuing to the southwestern part (see plate). Areas of outcrop, as designated on figure 2, will be described separately as areas A to L, together with tables of descriptions and analyses of drill cores.

Area A Gossan

Area A gossan (17,520 sq m), in the northern part of the area (see plate), is about 720 m long and as much as 90 m wide. The area was sampled along several lines, and two dia­ mond drill holes, WS-1 and WS-5, were put down in the gossan. The results of assays of surface samples are given in appendix 1.

Drill hole WS-1.--Hole WS-1 is located near the northern end of the mapped area, at an altitude of 1,203 m (see plate). It was drilled S.67°E., at an inclination of -45°, and is 139.5 m long. Fresh sulfides were encountered at a depth of 30 m, where a mineralized zone 68 m thick was inter­ sected (table 3). This zone contained a cumulative thickness of 25 m of 80-100 percent iron sulfide-bearing material (fig. 6A) .

21

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SA(IR)-372WS-1

EXPLANATIONWS-5

1200 METERS

Alluvium

Gossan

Zone number | |- 10-50'w

50-80

80-100

Percent suitide in core

100 METERS

153.6 meters

B. Section facing North

139.5 meters

WS-3

A. Section facing N.20°E.

WS41200 METERS-

129.9 meters

C. Section facing N.10°W.

Figure 6.- Cross sections along drill holes WS-1, -5, -3, -4, -6, -7, -8, and -9.

22

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WS-6

SA(lR)-372

WS-7

1200 METERS

D. Section facing N.23°E.

WS-8

1 52.6 meters

F. Section facing N.45°W.

138.5 meter*

E. Section facingN.25°E.

WS-9

1200 METERS

154.4 meters

G. Saction facing N.15° E.

Figure 6.- Continued.

23

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Table 3 .--Summary log of drill hole WS-1[Percent pyrite shown in parentheses]

Interval (meters) Description

0-30 Oxidized material30-31 Massive pyrite31-43 (80)43-47 Andesite bedded sequence (10)47-58 Diorite (10)

58-75 Fine-grained diorite75-76 Andesite bedded sequence76-78 15 percent pyrite grading to 30

percent pyrite at 78 m78-80 Andesite, well-bedded (20)80-83 (40)

83-85 (30-40)85-86 (10-15)86-87 (50)87-89 (60-80)89-90 (80)

90-92 (90)92-93 (20)93-95 75 percent pyrite (6 to 12 cm

intervals of 20 percent pyrite) 95-101 (90) 101-103 Fine-grained bedded andesite

103-107 (90)107-108 (50-75)108-110 (30) well-bedded110-111 (5-25)111-113 (20-30)

113-122 Fine-grained bedded andesite122-132 Fine-grained bedded andesite132-139.5 Fine-grained bedded andesite, end of

hole

24

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An electromagnetic survey by Alien and Davis (196^a, b) showed a pronounced high east of the projected end of hole WS-1. Hole WS-5 was drilled to test this magnetically high area and intersected 6.72 m of massive sulfides.

Analyses of core samples from hole WS-1 are given in table 4.

Drill hole WS-5.--Hole WS-5 is located about about 100 m east of hole WS-1, at an altitude of 1,201 m. It was drilled S.72°E., at an inclination of -60°, and is 103 m long (table 5). Hole WS-5 was designed to intersect a mineralized zone and an electromagnetic anomaly east of the zone explored in hole WS-1 (Alien and Davis, 196%, b) . The hole passed through bedded andesitic tuff and intersected massive pyrite and pyrrhotite at 53 m. A cumulative thickness of about 7 m of 80 percent iron sulfide-bearing material was found (fig. 6A) .

Analyses of core samples from hole WS-5 are listed in table 8, and major element chemical analyses are in table 7.

Area B gossan

Area B (105,110 sq m) is 1700 m long and as much as 200 m wide; it is displaced about 500 m to the southeast from area A along a northwest-trending, left-lateral fault. The gossan is siliceous and crops out as a prominent ridge for most of this distance; at the southern end it has been cut by many dikes of granitic to granodioritic composition. The results of surface sampling are given in appendix 1.

Three holes, WS-2, -3, and -4, were drilled in area B. Hole WS-2 was in rubbly rock that caved in; the hole was accordingly abandoned. The summary logs and analyses of the core of holes WS-3 and WS-4 follow (tables 8-12).

Drill hole WS-3. Hole WS-3 is located 200 m southeast of hole WS-2, at an altitude of 1,215 m (see plate). The hole was drilled west, at an inclination of -45°, and is 158.6 m long. Eighty meters of mineralized rock were intersected , of which about 52 m contained 80 percent or more sulfide-bearing material (fig. 6B, table 8).

Drill hole WS-3 intersected massive sulfides at a depth of 46.5 m and remained in sulfide-bearing material to a depth of 132 m. This sulfide-bearing interval appears to be repre­ sentative of the Wadi Wassat sulfide deposits; it consists of marginal zones of massive pyrite and a central zone contain­ ing 10-50 percent pyrite. Analyses of core samples are given in table 9.

25

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Table 4 .--Analyses of cores from drill hole WS-1[Material analyzed: MP, masive pyrite; DP, disseminated pyrite. Copper, results in parts per million, determined by semiquantitative spectrography by C.E. Thompson, USGS, and Mohamed Jambi, DGMR. Gold and silver, results in ounces per ton, determined by fire assay by S,M. Bahijrij DGMR. tr = trace, nil = not detected, -= not analyzed]

Sample number

3101031011310283101231029

3101331030310143101531031

3101631017310183103231019

3103331020310343102131035

3102231036310233102431037

310253102631027

Interval (meters)

29-3032-34

3536-38

39

4041427678

7982858688

8991939496

9799

100104105

106109112

Copper

1010101070

1010702070

2030201020

1015701010

1010010 15

____

Gold

trtr.02trtr

trnilnilnil

0.02

trnilniltrnil

trniltrtrtr

nil.02nil.02.02

nilnilnil

Silver

0.26.49nil1.68.12

.38

.14

.52

.16nil

.8nil

1.04nil.52

nil.12nil.46nil

.35nil.54.6.12

.92

.82

.88

Material analyzed

MPMPMPMPDP

MPDPMPMPDP

DPDPDPMPDP

MPMPDPMPMP

MPDPMPMPMP

MPDPDP

26

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Table 5. Summary log of dr-lll hole WS-5[Percent pyrite shown in parentheses]

Interval (meters)

0-50 50-5353-5454-5555-57

57-59 59-63 63-6565-6666-67

67-6868-6969-7070-73 73-76

76-79 79-83 83-8989-9090-103

Description

Bedded andesite Andesite Pyrite (60) Pyrite (85) Pyrite (40)

Pyrite (30-50) Pyrite, mainly Gray andesite, Gray andesite, Pyrite (60)

pyrite (10)

in veins (30) pyrite (10) pyrite (20)

Black bedded rock (10) Gray andesite Black bedded rock (10) Pyrrhotite (10) Pyrrhotite (90)

Pyrrhotite-pyrite (20-50) Pyrite-pyrrhotite (90) Pyrite-pyrrhotite (10) Pyrrhotite-pyrite (10) Gray andesite, end of hole

27

Page 33: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

Table 6. Analyses of core from drill hole WS-5

[Copper results in ppm, silver and gold in ounces per ton, percent pyrite in parentheses. Chemical analyses by Ibrahim Baradja, fire assays by S.M. Bahijri, and semiquantitative spectrographic analyses by Mohamed Jambi, USGS-DGMR Chemical Laboratory]

Sample number

35095

35094

35093

35092

35091

35090

35089

35088

35087

35086

35085

35084

35083

35082

35081

Interval (meters)

52

54

56

59

61

63

66

68

70

74

76

79

81

83

86

CopperSpectro- Chemical graphic

50

15

15

20

20

50

20

30

20

30

20

15

10

70

30

15

<10

15

30

40

75

30

40

20

30

10

<10

<10

115

60

GoldFire

nil

nil

nil

nil

nil

nil

nil

nil

nil

nil

nil

nil

nil

nil

nil

Silverassay

0.14

nil

.12

.26

.48

.46

.52

.09

.62

.26

.44

.13

.14

.13

.18

Material analyzed

Andesite

Pyrite (60)

Pyrite (40)

Pyrite (30)

Pyrite (30)

Pyrite (30)

Pyrite (30)

Andesite

Pyrite (10)

Pyrite (90)

Pyrite( 20-50)

Pyrite (90)

Pyrite (90)

Pyrite (10)

28

Page 34: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

Table 7. Ma

jor

element

chemical an

alys

es of

core from d

rill

ho

le WS-5

[*,

indicates

total

S an

d Fe,

resp

ecti

vely

. Ra

pid

rock

ana

lyse

s un

der

the

dire

ctio

n of L.

Shapiro, USGS L

aboratory, Wa

shin

gton

, D.

C.]

Samp

le

numb

er

35095

35094

35093

35092

35091

3509

035

089

3508

8CD

35087

35086

35085

35084

3508

33508

235

081

Interval

(meters)

52 54 56 59 61 63 66 68 70 74 76 79 81 83 86

Si0

2

20.2

12.5

35.2

41.9

54.1

46.1

48.4

40.7

39.0

18.1

49.9

17.8

16.5

45.6

49.4

A120

3

6.2

3.1

9.9

12.0

14.2

11.4

13.4 9.3

9.1

3.1

5.4

1.1

1.8

11.7 7.7

S* 30.1

37.8

22.1

16.5 9.0

13.3 7.5

15.8

18.2

16.2

15.5

36.1

32.7 9.6

6.2

Fe*

30.1

35.7

21.9

17.1

10.6

17.9

11.1

23.1

22.5

44.2

19.8

35.9

32.5

14.8

16.8

MgO

1.6

1.0 .85

1.0

1.5

1.5

2.3

1.0 .90

.25

.50

.37

.45

3.4

4.6

CaO

r&20

K20

(Res

ults

in weight

2.8

1.8

1.2

1.7

1.0 .55

2.6

1.4 .25

.45

2.7

1.0

6.4

3.0

4.6

0 0 1.2

2.1

2.5 .15

.75

0 .45

0 0 0 .15

1.2 0

1.9 .45

2.2

2.2

2.0

2.0

2.4 .85

1.2 .60

.20

.20

.25

2.5 .44

H20-

H2CH-

perc

ent)

0.61 .69

.44

.31

.33

.37

.68

.27

.46

.58

.58

.27

.21

.29

.61

1.8

3.2

1.8

1.8

2.7

1.6

4.2

4.0

3.4

1.7

2.4

1.8

2.0

3.4

3.9

Ti0

2

0.49 .14

.44

.47

.58

.54

.70

.46

.25

.19

.40

.20

.18

.48

.67

P20

5

0.22 .18

.16

.17

.17

.19

.21

.19

.22

.25

.16

.17

.17

.38

.30

Nfri

O

0.08 .14

.04

.05

.06

.10

.13

.08

.07

.09

.09

.03

.04

.13

.15

002

0.30 .94

.05

.42

.05

.08

2.8 .69

.45

1.2 .21

.62

2.9 .68

.58

Sum 96 98 97 97 99 96 97 98 96 87 98 96 96 97 91

Page 35: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

Table 8. Summary log of drill hole WS-3 [Percent pyrite in parentheses]

Interval (meters) Description

0-29 Porphyritic syenite dike29-38 Weathered andesite38-39.5 Disseminated pyrite in andesite

39.5-46.5 Andesite46.5-61 (90)

61-61.5 (10)61.5-62 (80)

62-64 (20-30)64-66 (90)66-67 (85)

67-68 (20)68-86 (90)86-90 (50)90-93 (75)93-94 (50)

94-95 (15)95-96 Core missing96-100 (10-25)100-103 Andesite (25)103-111 (90)

111-118 (80)118-119 (10)119-121 (70-85)U'l-122 (10)122-123 Bedded andesite

123-123.5 (20)123.5-124 (30)126-127 (20)127-129 (40)132-143 Andesite

143-153.6 Brecciated andesite, no sulfidesend of hole

30

Page 36: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

Table 9. Analyses of core from drill hole WS-3

[n.d. = not determined; - = not found; tr = trace. Gold and silver determined by fire assay by S.M. Bahijri. Copper of samples 31038, 31039, and 31040 determined by semiquantitative spectrographic analysis by C.E. Thompson and Mohamed Jambi. All other copper, lead, and zinc determinations are colorimetric chemical analyses by Saeed Osman. Work done at USGS-DGMR Chemical Laboratory]

Sample Number

3103831039310403911339114

3912339124391253912639120

3912139122391183911939131

3913239133391273912839129

Interval (meters)

48-4953-5456-586166

6972757880

84879093103

108110111114116

Gold Silver Copperounces per ton

tr 0.12 0.0015tr .11 .0015tr .23 .0015

<.002< .002

<.002_ _ _

< .002<.002< .002

< .002<.002< .002.005

< .002

< .002<.002< .002

n .d . - .002.002

Leadpercent

n.d.

<.0025<.0025

<.0025_

< .0025<.0025<.0025

<.0025<.0025< .0025<.0025< .0025

< .0025<.0025<.0025<.0025<.0025

Zinc

_

<.005<.005

<.005

.005

.005<.005

<.005<.005<.005<.005<,005

<.005<.005<.005.015.005

39130 121

31

Page 37: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

Drill hole WS-4. Hole WS-4 is located about 700 m south­ east of hole WS-1 (see plate), on the western side of the gossan explored by holes WS-2 and -3. The collar of the hole is at an altitude of 1,200 m. The hole was drilled N.80°E., at an inclination of -45°, and is 129.9 m long. It was in mineralized rock for 77 m, of which about 52 m contained 80 percent or more sulfide-bearing rock (fig. 6C) .

The hole was drilled to intersect the sulfide zone be­ neath a gossan. Although massive pyrite was intersected at a depth of 28 m, the principal body was not cut until 42 m (fig. 5C, plate). The hole probably passed through most of the mineralized zone (table 10). Massive pyrite is present both above and below the steeply dipping zone, with 5 to 50 percent pyrite in the center. Analyses of core samples are given in table 11. Major element chemical analyses are given in table 12.

Area C

Area C covers an area of 19,880 sq m and contains gossan outcrops over a strike length of about 780 m and a width of as much as 65 m. It overlaps slightly with area B, sugges­ ting either that it is a separate mineralized lens or a segment displaced on a north-northwest-trending, right- lateral fault.

Area C was sampled along several lines. Assays of gossan surface samples are given in appendix 1.

Area D

Area D covers an area of 24,240 sq m and is 650 m long am; us much as 60 m wide. It is a continuation of area C, bu has been displaced about 100 m to the east on a northwest-trending, left-lateral fault. At the southern end, the gossan either pinches out completely or plunges beneath the surface.

Assays of gossan surface samples are given in appendix 1.

Area E

Area E covers an area of 289,780 sq m and is 2.1 km long and as much as 560 m wide. This unusual width may be the re­ sult of duplication by folding and the mineralized zone may also be thicker here. Several mineralized beds may be present; some units on the western side are siliceous and crop out prominently. The units on the eastern side are not resistant and are overlain in places by soil crustified with iron oxides, sulfur, melanterite, and other secondary minerals.

32

Page 38: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

Table 10. Summary log of drill hole WS-4[Percent pyrite shown in parentheses]

Interval (meters) Description

0-13 Weathered andesite13-23 Gray andesite23-28 Weathered andesite28-29 (80)29-30 Core is soft, weathered, and contains

veinlets of melanterite30-31 Oxidized material31-32 (90)32-34 (90); lower 3.6 cm contains

disseminated pyrite34-35 Andesite (10)35-39 Disseminated pyrite in calcite39-56 (90)56-58 (30-50) with calcite58-59 (50-75)59-60 (30)60-61 (80)61-62 (30)62-64 (10)64-66 (10-20)66-75 Pyritiferous bedded andesite75-76 (90)76-76.5 (15)

76.5-77 (30-40)77-78 (80)78-80 (20)80-81 (10)81-81.5 (75)

81.5-83.5 (30-40)83.5-84 (50)

84-85 (10)85-87 (20-30)87-91 (90)91-92 90 percent pyrite and pyrrhotite92-93 (20-40)93-94 (90)94-95 (10-30)95-105 90 percent pyrite except for 0.3 m

bedded interval at 101 (30 percent)105-114 90 percent pyrite except for 0.5 m

rhyolite dike at 114 m114-117 (90)117-121 (10-40)121-129.9 (10-30), end of hole

33

Page 39: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

Table 11. Analyses of core from drill hole WS-4[ tr = trace, nil = not found, - = not determined. Copper results in parts per million, gold and silver in ounces per ton. Material analyzed: MP, massive pyrite; DP, disseminated pyrite; percent pyrite in parentheses. Chemical analyses by I. Baradja, fire assays by S.M. Bahijri, semiquantitative spectrographic analyses by K. Shahwan, USGS-DGMR Chemical Laboratory]

Sample number

3503735038350393504035041

35041A35042350433504435045

3504635047350483504935052

3505435055350563505735058

3505935063350653506835069

3507035071350723507335074

3507635077350783507935080

Interval (meters)

2831343542

4548515054

5558616467

7073767982

8587919399

102105108111114

117120124127125

CopperSpectro- Chemical graphic

1515 <2015 <10

101010 <- <

2040404040

4070301515

1515 <151515

1510101010

1020202030

CIOCIOCIOCIOCIO

CIOCIOCIOCIOCIO

CIO20202010

6075CIO30CIO

(10CIOCIOCIO(10

(10CIO(101010

1010301060

GoldFire

nilnilniltrtr

trtrtr tr

nilnilnilnilnil

nilnilnilnilnil

nilnilnilnilnil

nilnilnilnilnil

nilnilnilnilnil

Silverassay

0.09.09.13.27.17

.21

.18

.26 .26

.17

.34

.28

.32

.36

.09

.16

.05

.21

.05

.08

.06

.12

.15

.14

.52

.15nil.08.06

.11

.18

.13

.16

.34

Material analyzed

MPMPDPDPMP

MPMPMP9

MP

MP(30-50)

(30)9

(1CK30)

(10-20)DPMP(20)

(30-40)

(10)(20-30)

MP(90)(90)

(90)(90)(90)(90)(90)

MP(10-40)(10-30)(10-30)(10-30)

34

Page 40: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

!

OJ

p

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§en en>>

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35

Page 41: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

Surface samples collected in the area were analyzed (appendix 1).

Drill hole WS-7. Hole WS-7 is located on the northeas­ tern side of the gossan (see plate). The hole was drilled N.65°W., at an inclination of -45°, for a length of 138.5 m. The altitude at the collar of the hole is 1,225 m. The hole penetrated only a small part of the mineralized zone overlain by gossan. The gossan along the western side of the area was not explored, either by drilling or by geophysical surveys. About 103 m of mineralization were intersected in the hole, of which a cumulative thickness of 52 m contained more than 80 percent sulfide-bearing material (fig. 6E, table 13).

Analyses of core from drill hole WS-7 are given in table 14.

Area F

Area F is a continuation of area E and is located on the southern side of Wadi ab Arram. It consists of two lenses of gossan whose combined area is about 34,910 sq m; the longer lense is 370 m long and as much as 100 m wide, and the shorter lense is about 360 m long and as much as 60 m wide.

Analyses of surface samples are given in appendix 1.

Drill hole WS-6. Drill hole WS-6 was drilled into the into the gossan on the eastern side of area F. The collar is at an altitude of 1,235 m. The hole is 91.5 m long and was drilled S.67°E., at an inclination of -45°. About 26 m of material containing 80 percent or more pyrite-bearing material were cut in the hole (fig. 6D, table 15). Analyses of the core are given in table 16.

Area G gossan

Area G gossan covers an area of 35,600 sq m and is a southward continuation of area F. It has been displaced about 200 m to the southeast of area F on a northwest- trending, left-lateral fault. The gossan ends against another fault that trends north. The gossan is 1,100 m long and as much as 130 m wide. Some parts are siliceous and crop out prominently, but much of the gossanous area has low relief.

The analyses of surface samples are given in appendix 1.

Area H gossan

The gossan of area H is about 1,100 m long and is as much as 320 m wide. It covers an area of 74,580 sq m and strikes

36

Page 42: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

Table 13. Summary log of drill hole WS-7[Adapted from Overstreet and others, Percent pyrite in parentheses]

Interval (meters) Description

0-16.416.4-17.217.2-19.719.7-25.224.2-33.0

33.0-33.533.5-42.042.0-42.8

42.8-50.050.0-52.5

AlluviumAplite (1)Altered diorite (1)Gossan and gouge(90-99)

Gypsiferous massive(85-99)Disseminated pyrite

(20-70)(95-99)Disseminated pyrite

(20-60)

pyrite

in argillite

in agglomerate

52.5-71.0 71.0-72.4

72.4-78.8 78.8-83.5 83.5-92.9

92.9-94.8 94.8-108.8 108.8-117.5 117.5-119

119-126.4

126.4-128.5 128.5-138.5

(90-99)Interlayered massive and disseminatedpyrite (40-99)

Disseminated pyrite (20-60) Massive pyrite Disseminated pyrite

Massive pyrite Disseminated pyrite (85) Disseminated pyrite (10-30) Massive pyrite (85-80) Massive and disseminated pyrite,

interlayered (1-15)

Disseminated pyrite (2-5) Massive andesite, disseminated pyrite (0.5), end of hole

37

Page 43: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

Table 14. Analyses of core from drill hole WS-7[nil = not detected. Chemical analyses for copper and zinc by John C. Chandler, USGS Laboratory, Washington, D.C. Fire assays for gold and silver by M. Fourati, USGS-DGMR Chemical Laboratory]

Sample number

3008730088300893009030091

3009230093300943009530096

3009730098300993010030101

3010230103301043010530107

3010830109301103011130112

3011330114301153011630117

3011830119301203012130122

Interval (meters)

24-2629-3032-3339-4042-42.5

45-45.547-47.5

48.4-49o & o ~o o54.5-55

58-58.561-61.564-64.567-67.570-70.5

73-73.576-76.579-79.582-82.585-85.5

88-88.591-91.594-94.5

97.5-98100-100.5

103.5-104106.5-107109.5-110112.5-113118.5-119

122-122.5125-125.5128-128.5131-131.5134-134.5

Copper(parts per

10<2<25

37

1071<2<24

7<211<29

282110<224

7414

4572

3793622843

4620717343

Zincmillion)

35

<29

72

3441034276

1616298

37

4751461349

3242213636

3290503524

5129576232

Gold(ounces

nilnilnilnilnil

nilnilnilnilnil

nilnilnilnilnil

nilnilnilnilnil

nilnilnilnilnil

nilnilnilnilnil

nilnilnilnilnil

Silverper ton)

0.48.40.34.47.24

.16

.23

.39

.40

.32

.32

.32

.12

.04

.24

.28

.28

.38

.23nil

nil.06

nilnil.16

nil.06.04

nilnil

.06

.12

.40

.26

.28

30123 137-137.5 56 43 nil .16

38

Page 44: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

Table 15. --Summary log of drill hole WS-6

[Adapted from Overstreet and others, 1969 Percent pyrite in parentheses]

Interval Description(meters)___________________________________________

0-18.2 Alluvium and weathered rock18.2-21.2 Gossan21.2-22.7 Leached gray andesite22.7-25.1 Leached microdioritic porphyry25.1-27.3 Leached microdiorite

27.3-30.3 Leached diorite altered togypsiferous rock

30.3-33.3 Clay, gypsum, and iron oxide 33.3-35.7 Upper part of interval is oxidized;

lower part is massive pyrite 35.7-43.3 (95) 43.3-48.0 (90)

48.0-55.7 (95)55.7-58.8 Massive and disseminated pyrite,

average (40)58.8-62.0 (85-90) 62.0-64.0 Average (40) 64.0-66.8 (5-15)

66.8-68.2 Disseminated pyrite in microdiorite(30-60)

68.2-69.2 Andesite with disseminated pyrite 69.2-71.2 Disseminated pyrite in andesitic

agglomerate (5-60) 71.2-74.2 Disseminated pyrite in andesitic

agglomerate, (up to 25) 74.2-91.5 Disseminated pyrite in masssive

andesite and andesitic agglomerate(1-15)

39

Page 45: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

Table 16. Analyses of core from drill hole WS-6

[nil = not detected. Copper and zinc results in parts per million, silver and gold in ounces per ton. Chemical analyses for copper and zinc by John C. Chandler, USGS Laboratory, Washington, D.C. Fire assays for gold and silver by M. Fourati, spectrographic analyses for copper, USGS-DGMR Chemical Laboratory]

Sample number

30129

30130

30131

30132

30133

30134

30135

30136

30140

30144

Interval (meters)

48.5-49

51.5-52

54.5-55

57-58.5

60-61.5

64-64.5

67-67.4

70-70.5

79-79.5

88-88.5

Copper Gold Silver ZincChemical Spectro­

graphic

5

10

5

5

14

9

68

86

78

60

<10

<10

<10

<10

10

10

75

115

115

75

nil

nil

nil

nil

nil

nil

nil

nil

nil

nil

0.24

.60

.54

.61

.50

.66

.68

.60

.68

.62

27

8

8

14

16

11

22

42

11

12

40

Page 46: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

north-northwest and dips west-southwest. Originally the mineralized zone of area H was probably continuous with that of area G, but is now displaced about 400 m to the north of area G. On the north, gossan H apparently ends against a fault in Wadi ab Arram.

Analyses of surface samples collected in area H are given in appendix 1 .

Drill hole WS-8. Hole WS-8, which was drilled in the northwestern part of the gossan, is at an altitude of 1,244 m; it is 152.6 m long and was drilled N.45°E., at an inclina­ tion of -45°. About 107 m of massive and disseminated pyrite and pyrrhotite were cut in the hole; of this, a cumulative thickness of 41 m is 80 percent or more sulf ide-bearing material (fig. 6F, table 17). Analyses of core samples are tabulated in table 18. Major element chemical analyses of 30 samples from drill hole WS-8 are given in table 19.

Area I gossan

Gossan bodies in Area I cover an area of 76,900 sq m and are scattered along a zone about 1,300 m long and 200 m to 300 m wide. The bodies are poorly exposed and crop out mostly on low hills that rise only a few meters above the pediment surface. At the northwestern end of the area, the mineralized zone forms a tight arc as it bends from a northwest-trending strike and southwest dip to a southwest- trending strike and southeast dip.

Analyses of surface samples are given in appendix 1.

Drill hole WS-9. Hole WS-9 was drilled in the north­ western part of the gossan. The collar of the hole is at an altitude of 1,265 m; it is 154.4 m long and was drilled N.75°W., at an inclination of -45° (fig. 6G, table 20). It penetrated two sulfide zones about 88 m apart; the cumulative thickness was 16 m of 80 percent sulfide-bearing material, mostly pyrrhotite.

Analyses of core from hole WS-9 are given in tables 21and 22.

41

Page 47: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

Table 17. Summary log of drill hole WS-8

IntervalDescription(meters)______________________________________________

0-27 Weathered material27-34 Andesite intruded by granite at 32 m34-38 Gray, fine-grained andesite with

feldspar phenocrysts38-39 30-50 percent pyrite-pyrrhotite39-41 Gray andesite, 90

41-44 80 pyrite44-48 90 pyrite48-49 50 percent pyrite-pyrrhotite49-58 90 percent pyrite-pyrrhotite58-59 75 percent pyrite-pyrrhotite

59-64 80 percent pyrrhotite64-65 Gray andesite (<10 pyrite)65-67 40 percent pyrrhotite67-69 10 percent pyrrhotite69-70 75 percent pyrrhotite

70-82 90 percent pyrrhotite82-84 30 percent pyrrhotite84-85 90 percent pyrrhotite, disseminated

pyrite85-86 50-70 percent pyrrhotite86-87 90 percent pyrrhotite

87-95 Gray andesite, intruded by granite95-96 Andesite96-99 Massive pyrrhotite99-108 Disseminated pyrrhotite108-109 85 percent pyrrhotite

109-110 45 percent pyrrhotite110-112 Massive pyrrhotite112-116 Gray andesite116-117 80-90 percent pyrrhotite117-121 Gray andesite, 30 percent pyrrhotite

121-125 Gray andesite125-134 Gray andesite intruded by diorite134-135 Gray andesite135-136 80-90 percent pyrrhotite136-142 Gray andesite intruded by diorite

142-143 10-50 percent pyrrhotite143-144 Gray andesite, 90 percent pyrrhotite144-152.6 Gray andesite intruded by diorite

except for the interval 149-150 m which is 30-50 percent pyrrhotite, end of hole

42

Page 48: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

Table 18. Analyses of core from drill hole WS-8

[- = not determined. Copper results in parts per million, silver in ounces per ton. Material sampled: MP, massive pyrite; DP disseminated pyrite. Percent pyrite in parentheses. Chemical analyses for copper by Ibrahim Baradja, fire assay for silver by S.M. Bahijri, spectrographic analyses for copper by K. Shahwan, USGS-DGMR Chemical Laboratory]

CopperSample number

3512535124351233512235121

3512035119351183511753116

3511535114351133511235111

3511035109351083510735106

3510535104351033510235101

3510035099350983509735096

Interval (meters)

3941434750

5356596164

6670727577

8184858790

94-

112118

121130136142144

SilverSpectro- Chemical graphic

_----

_----

_20202020

2030203070

3015201570

7010010070

100

_----

_----

_10101010

10101010

115

6020101015

7522510-

10

0.14.04.02.10.06

.09

.02

.32

.40

.12

.02

.08

.06

.14nil

.11nil.14.17

1.06

1.12.06.24.36.38

.32

.16

.36

.24

.16

Material analyzed

(90)(90)(90)(90)(90)

(90)(90)(75)(80)(80)

(40)(75)(90)(90)(90)

(90)(30)(90)DP(50-70)

(90) _MP(80-90)

(30)Andes! te(80-90)(60)Andesite

43

Page 49: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

Tab

le 10.

Majo

r el

emen

t ch

emic

al

analy

ses

of

coi-

e fr

om

M

S-8

[*

indic

ates

to

tal

S an

d F

e,

resp

ecti

vely

. R

apid

ro

ck a

nal

yse

s un

der

the

dir

ecti

on o

f L

. S

hap

iro

, U

SGS

Lab

ora

tory

, W

ashi

ngto

n,

D.C

.]

Sample

number

3512

535

124

3512

335

122

3512

1

3512

035

119

3511

835117

35116

35115

35114

3511

335112

35111

35110

35109

3510

835

107

35106

3510

535

104

3510

335

102

3510

1

35100

3509

935098

3509

735096

Interval

(met

ers)

39 41 43 47 50 53 56 59 61 64 66 70 72 75 77 81 84 85 87 90 94 - 112

118

121

130

136

142

144

Si0

2A1

203

S*Fe

*%o

CaO

(Results

30.8

33.6

23.2 9.0

24.6

11.7

16.4

44.1

17.2

13.8

46.4

20.7

12.2

18.6

25.7

21.0

15.5

32.6

27.9

39.8

48.7

38.6

20.7

54.6

38.3

43.8

44.4

17.6

23.1 9.4

7.8

10.5 7.4

4.2

5.6

4.4

6.0

14.0 5.5

4.5

14.1 6.3

4.2

5.5

8.3

7.5

4.8

8.8

9.3

12.3

15.5

10.5 8.0

18.2

12.3

12.4

14.7 6.3

6.7

2.8

16.6

12.8

15.7

25.3

15.9

16.8

21.8 9.4

22.8

22.8 7.6

27.2

36.6

26.1

13.8

20.8

19.7

13.4

10.0

12.3 5.6

12.7

24.7 2.2

6.5

7.9

7.7

17.6

20.8

18.2

32.7

29.1

36.6

48.7

40.1

42.4

44.6

16.9

16.8

41.0

15.8

37.3

37.1

39.3

37.8

36.2

39.2

31.6

31.2

16.7 9.4

20.4

35.2 6.6

23.4

15.3

15.5

42.0

37.2

50.4

1.2

1.6

1.4 .35

.92

2.2 .70

2.1

2.2 .80

2.8 .92

1.0 .65

.80

1.0

1.0

1.2

1.1

3.4

4.7

2.4

1.3

2.6

2.4

4.1

2.5 .80

.85

.17

1.2

2.3

4.0

1.4

1.0

6.5

1.3

2.6

3.7

1.5

2.8

1.9

2.0

1.1

1.3

3.2

1.8

1.2

1.6

3.1

4.2

5.0

1.7

4.1

2.1

3.4

2.1

1.9

1.6

1.6

Na.20

K20

H2O-

H2O

in w

eight

perc

ent)

1.4

1.2

0.50

0.90

2.3

1.0

.16

.94

1.2

.85

.18

.80

.45

.40

.52

.38

1.4

1.2

.08

.58

.25

.72

.09

.60

.80

.45

.27

.85

3.1

3.5

.18

1.2

3.1

.82

.58

.31

.80

.95

.18

.82

3.2

3.1

.18

.34

1.1

1.2

.39

1.6

1.2

.70

.92

.68

.80

.40

.79

.71

.95

.60

.14

.48

1.3

1.0

.08

.77

1.2

.65

.36

.39

1.7

2.4

.18

.82

1.4

1.6

.15

2.9

1.8

4.1

.55

2.9

2.6

4.2

.32

1.7

1.7

.75

.32

2.2

1.9

.20

1.1

1.2

4.8

2.8

.34

1.4

2.4

1.4

.36

1.1

2.0

3.9

.59

1.5

3.1

3.0

.59

1.8

1.2

.80

.16

1.2

1.4

1.2

.60

1.7

.20

.35

.11

.70

Ti0

2

0.32 .29

.24

.09

.20

.15

.14

.14

.26

.25

.14

.42

.17

.12

.17

.24

.19

.16

.20

.21

.79

.32

.16

.52

.52

.36

.44

.18

.15

.08

P20

5

0.24 .26

.27

.24

.25

.24

.25

.24

.06

.24

.25

.35

.24

.22

.23

.24

.24

.29

.23

.26

1.2 .41

.21

.31

.25

.51

.36

.25

.22

.25

mo

0.07 .07

.31

.31

.05

.08

.05

.05

.05

.05

.09

.06

.08

.04

.07

.09

.06

.06

.06

.12

.12

.11

.08

.16

.12

.13

.12

.05

.04

.09

00?

<.05

<.05

<.05 .08

.05

2.5

<.05

<.05

<.05

<.05

<.05

<.05

<.05 .05

.05

.05

.05

.05

.05

.11

.65

.05

.05

.05

.05

.05

.18

.11

.05

.12

Sum

95 93 92 91 92 97 94 98 78 98 97 93 97 94 90 94 90 94 88 96 100

95 96 99 91 96 96 93 97 84

Page 50: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

Table 20. Summanj log of drill hole WS-9

Interval Description (meters)_____ _____

0-35 Diorite, fine-grained (little core15-35 m)

35-42 Diorite, fine- to coarse-grained,slightly pyritic

42-45 Pyrrhotite, 90 percent sulfide45-46 Andesite with pyrite and pyrrhotite,

5-10 percent sulfide46-50 Pyrrhotite, some pyrite, 40-60

percent sulfide

50-51 Diorite, some pyrrhotite, <5 percentsulfide

51-53 Pyrrhotite, some pyrite, 60-80percent sulfide in diorite. Faults at 53 m at acute angle to axis of core

53-67 Diorite, trace pyrrhotite67-76 Brecciated zones cemented by

pyrrhotite, pyrite, and calcite in andesitic sedimentary rock, calc-silicate rock, and chloritic and kaolinitic diorite

76-89 Diorite; chloritic and calc-silicaterock, slightly pyritic

89-91 Calc-silicate rock, brecciated ,pyritic

91-93 Diorite, chloritic93-106 Argillite, calc-silicate, contorted 106-111 Diorite, brecciated in part, calcite

veins111-117 Argillite and calc-silicate; breccia

zone with calcite veining and cement. Structures about parallel to axis of core

117-129 Diorite, chloritic, and argi31ite.Brecciated 122-123 m with some pyrrhotite and pyrite

129-142 Pyrrhotite, massive, 80-90 percentsulfide

142-143 Diabase143-154.4 Argillaceous calc-silicate rock,

contorted

45

Page 51: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

Table 21. Analyses of core from drill hole WS-9

[nil = not detected. Copper results in parts per million, silver and gold in ounces per ton. Material analyzed: MP, massive pyrite; DP, disseminated pyrite. Fire assays for gold and silver by S.M. Bahijri, chemical analyses for copper by Ibrahim Baradja, spectrographic analyses by K. Shahwan, USGS-DGMR Chemical Laboratory]

CopperSample number

3500335005350063500735008

3501135013350193502035024

35027350293503135033

Interval (meters)

374242.54343.5

4446

120123129

130137138141

Spectro­ graphic

3010101020

15010151520

20201515

Chemical

3010101010

1010101010

10<10<10<10

GoldFire

nilnilnilnilnil

nilnilnilnilnil

nilnilnilnil

Silverassay

nil0.10.17.17.13

.11

.14

.16

.28

.16

.06

.17

.05

.11

Material analyzed

DPDPMPMPMP

MPMPDPDPMP

MPMPMPMP

46

Page 52: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

Table 22. Major

elem

ent

chemical an

alys

es of

core from d

rill

ho

le W

S-9

[* in

dica

tes

tota

l S

and

Fe,

respectively.

Rapi

d ro

ck ana

lyse

s un

der

the

dire

ctio

n of L.

Shapiro, US

GS La

bora

tory

, Washington,

D.C.]

Sample

number

35003

3500

535006

3500

735

008

3501

135

013

35019

35020

35024

3502

735029

3503

13503

3

Interval

(met

ers)

37 42 42.5

43 43.5

44 46 120

123

129

130

137

138

141

SiOz

48.1

15.4

10.8

19.8

43.2

23.2

16.7

39.4

42.4 9.1

7.8

6.7

9.0

10.3

A120

3

8.0

5.6

3.8

5.4

9.0

5.7

4.3

11.4

12.2 2.3

2.4

2.2

3.2

3.4

S* 2.6

26.0

21.0

20.9 4.6

19.9

32.4 5.4

1.2

20.5

22.6

25.8

27.0

30.9

Fe*

6.8

39.9

50.6

42.5

15.9

35.4

35.0 7.8

5.8

52.2

53.2

53.2

48.2

43.4

MgO

15.2 2.1 .86

.84

8.1

2.2

1.8

5.2

5.5 .91

.56

.52

.85

.53

CaO

Na20

K20

(Res

ults

in weight

11.4 1.8

1.1 .70

.94

2.5

1.2

8.8

8.6

1.9 .95

1.0

1.0

.85

0.94 .62

.71

1.2

1.5 .90

.57

1.8

1.8 .38

0 .02

.29

.23

0.65 .37

.37

1.5 .45

.72

.52

.80

1.4 .45

.32

.08

.62

.22

H20-

H2O

percent)

0.18 .90

.21

.10

.25

.52

.66

2.7 .39

.30

.35

.57

.78

1.6

2.4

2.3 .56

.84

2.0

2.8

3.2

6.1

8.3 .90

.65

.63

1.0

1.7

Ti02

0.44 .30

.15

.31

.36

.26

.25

1.0 .79

.11

.11

.06

.12

.14

PzQs

0.40 .30

.26

.26

.59

.24

.19

.34

.44

.21

.23

.23

.23

.22

MnO

0.18 .12

.04

.05

.29

.14

.07

.09

.14

.12

.08

.05

.14

.07

<X>2

0.08

<.05

<.05

<.05 .21

1.6

3.0

8.8

10.2 .5

2

.05

.05

.05

.05

Sum 97 96 90 94 87 96 100

100 99 90 89 92 92 94

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Area J gossan

The area J gossan covers an area of 10,390 sq m and is a discontinuous zone about 500 m long and 10 to 40 m wide. The zone is truncated by granitic bodies to the north and south and by a dioritic body to the east.

Analyses of surface samples are given in appendix 1.

Area K gossan

The area K gossan is 400 m long and is 15 to 60 m wide; it covers an area of 14,790 sq m. It ends against granitic rocks to the north and dioritic rocks to the east and is overlapped by alluvium in a tributary of Wadi Mahal on the south .

Analyses of surface samples are given in appendix 1.

Area L

Area L covers an area of 60,760 sq m and is shown in the southwestern part of the plate. The principal gossan zone has an overall length of about 750 m and a width of as much as 200 m. The area contains discontinuous gossan bodies that are separated by septae of granite and diorite intrusive bodies and probably underlain by intrusive rocks at shallow depths.

Samples along several lines cut across the area. The analyses of these samples are given in appendix 1.

Geochemistry

Minor elements in pyrite-pyrrhotite-bearing core from Wadi Wassat are present in comparatively low abundances. Precious metals are virtually absent, base metal abundances are low, and many other elements are present in amounts below their detection limits (Overstreet and others, 1976).

In drill holes WS-6 and WS-7, Overstreet and others (1976) found that 16 elements, antimony, arsenic, beryllium, bismuth, cadmium, germanium, gold, silver, tin, lanthanum, niobium, selenium, tellurium, thallium, tungsten, and vanad­ ium, are present in both the massive sulfide-bearing material and the wall-rock material in amounts below the limits of analytical detection for the methods used. Minor elements present in greater amounts in the massive sulfide-bearing material than in the wall-rock material are boron, cobalt, gallium, lead, molybdenum, and tin. The minor elements that are more abundant in the wall-rock material than in the sulfide-bearing material are barium, chromium, copper, lith-

48

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ium, manganese, mercury, nickel, rubidium, scandium, titan­ ium, vanadium, yttrium, zinc, and zirconium.

Results of analytical work

Approximately 1100 samples from Wadi Wassat were analyzed in the USGS-DGMR Chemical Laboratory in Jiddah. Of these, about 450 were gossan samples and 650 were sulfide-bearing samples from drill core. In addition to nickel and cobalt, silver, copper, lead, zinc, manganese, chromium, and molyb­ denum were routinely determined; gold was also determined in some samples. These analytical determinations were entered in the DGMR PDP-11/45 computer, and the means and correlation coefficients were calculated.

Resources

Mapping in the Wadi Wassat area indicates that about 765,000 sq m of gossans are exposed (plate). Some of these gossans were explored and found to grade into sulfide-bearing units at a depth of about 30 m. The calculation of sulfide resources is subject to some uncertainties, but using reason­ able assumptions, estimates of the minimum available tonnage can be made.

During exploration, the percentage of pyrite and pyrr- hotite in each unit of core was estimated, and the unit was placed into one of the following classes: 100-80 percent sulfide, 80-50 percent sulfide, and 50-10 percent sulfide (table 23). The total length of each class was then divided by the total aggregate length, giving the following percentages of each class:

100-80 percent - 53 percent of total mineralized interval 80-50 percent - 6 percent of total mineralized interval 50-10 percent - 41 percent of total mineralized interval

Hole WS-5 was excluded from the computation, because it ex­ plored a stratigraphically higher bed that is not considered to be representative of the other mineralized beds.

The computation of tonnage of sulfide ore was carried out as follows:

The percentage of sulfide-bearing material containing more than 80 percent sulfide (53 percent) is multiplied by the specific gravity of pyrite (5.0), and then by the total square meters (less areas J, K, and L, 678,520 sq m) of gos­ san (appendix 1) to give metric tons per meter depth. Thus .53 x 5.0 x .80 x 678,520 x 100 = 143,846,240 (total metric tons per 100 m depth) .

49

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Table 23. Distribution of pi/rite and pyrrhotite in drill holes WS-1 through WS-9

[Thickness computed on assumption that all bedding is vertical]

Hole number

1

3

4

5

6

7

8

9

Cumulative length (meters) Percent sulfide class

100-80 80-50 50-10

25

52

52

7

26

52

41

16

6

10

2

2-

-

5

2

37

18

23

70

14

28

15

4

Total

68

80

77

79

40

80

61

22

50

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On the assumption that the interval from the surface to the bottom of the oxidized zone (averaging about 25 m) to the bottom of the holes (averaging about 100 m) is 80 percent sulf ide-bearing ore, then the resources are 75 percent of 143,846,240, or 107,884,680 tons, which can be rounded off to 107,500,000 tons. This iron sulfide resource averages about 40 percent iron and 35 percent sulfur.

In addition, large blocks in areas J, K, and L, which may be underlain by sulfide-bearing material, were not included in the calculations, and therefore the resources calculated above represent a minimum value. In order to obtain a more accurate idea of the total available tonnage, additional drilling both along strike and down dip is required.

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REFERENCES CITED>

Akhrass, M. N. , 1966, Magnetic survey on the gossan of Wadi Wassat (near Bi'r Idimah): Saudi Arabian Directorate General of Mineral Resources Open-File Report 267, 2 p.

Alien, R. V., and Davis, W. E., 1969a, Geophysical investigations in theBi'r Idimah-Wadi Wassat area, Saudi Arabia Part One: U.S. Geological Survey Open-File Report (IR)SA-53, 3 p.

_________ 1969b, Geophysical investigations in the Bi'r Idimah-Wadi Wassat area, Saudi Arabia Part Two: U.S. Geological Survey Open-File Report (IR)SA-54, 4 p.

Anderson, R. N. , and Halunen, A. J., 1974, Implications of heat flow for metallogenesis in the Bauer Deep: Nature, v. 251, p. 473-75.

Brown, D. G. , and Jackson, R. 0., 1959, Geology of the Asir quadrangle, Kingdom of Saudi Arabia: U.S. Geological Survey Miscellaneous Geologic Investigations Map I-217A, scale 1:500,000.

Cohee, G. C. , 1974, Stratigraphic nomenclature in reports of the U.S. Geological Survey: Washington, D.C., Geologic Names Committee, 45 p.

Corliss, J. G., 1971, The origin of metal-bearing submarine hydrothermal solutions: Journal of Geophysical Research, v. 76, p. 8128-8138.

Dodge, F. C. W., and Rossman, D. L. , 1975, Mineralization in the Wadi Qatan area, Kingdom of Saudi Arabia: U.S. Geological Survey Saudi Arabian Project Report 190, 71 p. (U.S. Geological Survey Open-File Report 75-309).

Goodwin, A. M., 1973, Archean iron-formations and tectonic basins of the Canadian Shield: Economic Geology, v. 68, p. 915-933.

Greenwood, W. R., 1980, Reconnaissance geology of the Wadi Wassat quadrangle sheet 18/44 C, Kingdom of Saudi Arabia: Saudi Arabian Directorate General of Mineral Resources Geologic Map GM-40, 52 p., scale 1:100,000.

52

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jacKaman , Barry, 1972, Genetic and environmental factors controlling the formation of the massive sulfide deposits of Wadi Bidah and W'adi Wassat, Saudi Arabia: Saudi Arabian Directorate General of Mineral Resources Technical Record, TR-1972-1, 244 p.

Kuno, H., 1966, Lateral variation of basalt magma type across continental margins and island arcs: Bulletin Volcanologique, v. 29, p. 195-221.

Martin, Conrad, 1973, Wadi Wassat pyrite, in Mineral resources research, 1968-69: Saudi Arabian Directorate General of Mineral Resources, p. 94-96.

Mauger, R. L. , 1972, A sulfur isotope study of the Ducktown Tennessee district, U.S.A.: Economic Geology, v. 67, p. 497-510.

McMurty, G. M., and Burnett, W. C. , 1975, Hydrothermal metallogenesis in the Bauer Deep of the southeastern Pacific: Nature, v. 254, p. 42-44.

Overstreet, W. C. , 1968a, Mineral investigations between Khamis Mushayt and Bi'r Idimah, Saudi Arabia: U.S. Geological Survey Open-File Report (IR)SA-23, 18 p.

_________ 1968b, Mineral exploration between Bi'r Idimah and Wadi Haraman, Asir quadrangle, Saudi Arabia: U.S. Geological Survey Open-File Report (IR)SA-39, 70 p.

________ 1968c, Preliminary results of a trip October 30-December 21, 1965, to the area between Sha'ya and Jabal Bani Bisqan, Saudi Arabia, together with a synopsis of mineral reconnaissance in the Asir quadrangle: U.S. Geological Survey Open-File Report (IR)SA-40, 48 p.

________ 1969d, Summary of results from a trip February 6-March 5, 1966, to Bi'r Idimah, Jabal Ashirah, and the As Sarat mountains, Saudi Arabia: U.S. Geological Survey Open-File Report (IR)SA-49, 47 p.

Overstreet, W. C., Bahijri, S. M., Fourati, M. A., and Gonzales, Louis, 1967a, Progress Report II. Assays and analysis of pyritic core from Wadi Wassat gossan, Saudi Arabia: U.S. Geological Survey Open-File Report (IR)SA-63, 8 p.

Overstreet, W. C., Bahijri, S. M., and Shararahly, A. H., 1969a, Results of a trip October 25-29, 1966, to the Bi'r el Adhbat area and the Esh Qay'ib (Esh Sha'ib) mine, eastern Asir, Saudi Arabia, including assays of materials from ancient mines in the eastern Asir: U.S. Geological Survey Open-File Report (!R)SA-84, 20 p.

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Overstreet, W. C., Gonzalez, Louis, Thompson, C. E., Fourati, M. A., Sharah, All, and Sumbul, Jamal, 1967b, Progress report on analyses of pyritic core from diamond drill holes under gossan at Wadi Wassat, Saudi Arabia: U.S. Geological Survey Open-File Report (IR)SA-58, 17 p.

Overstreet, W. C., Hubert, A. E. , Crenshaw, G. L. , , and Mosier, E. L., 1976, Petrogenic significance of minor elements in pyritic core from the Wadi Wassat massive sulfide deposit, Kingdom of Saudi Arabia: U.S. Geological Survey Saudi Arabia Project Report 214, 116 p. (U.S. Geological Survey Open-File Report 76-863).

Overstreet, W. C., Raisanen, Eino, Fourati, M. A., Shahwan, K. H., and Baradja, Ibrahim, 1969b, Progress Report III. Description and analyses of pyritic core from drill holes 6 and 7, Wadi Wassat area: U.S. Geological Survey Open-File Report (IR)SA-92, 75 p.

Overstreet, W. C., and Rossman, D. L., 1970, Reconnaissances geology of theWadi Wassat quadrangle, Kingdom of Saudi Arabia: U.S. Geological Survey Open-File Report (IR)SA-117, 67 p.

Roberts, Ralph, J., 1976, The genesis of disseminated and massive sulfide deposits in Saudi Arabia: U.S. Geological Survey Saudi Arabian Project Report 207, 54 p. (U.S. Geologicval Survey Open-File Report 76-602).

Rye, R. 0., Roberts, R. J., and Mawad, M. M. , 1979, Preliminary sulfur isotope investigations of mineral deposits in the Precambrian Shield, Kingdom of Saudi Arabia, in Evolution and mineralization of the Arabian-Nubian Shield: Oxford, Pergamon Press, v. 1, p. 131-140.

Weissenborn, A. E., and Earhart, R. L., 1969, Appraisal of the Wadi Wassat and Wadi Adhbat pyrite deposits, Asir quadrangle, Kingdom of Saudi Arabia: U.S. Geological Survey Open-File Report (IR)SA-lOl, 21 p.

Wilch, L. 0., 1978, Rock analysis storage system (RASS), Saudi Arabia - An introduction to the system and sample submittal manual - 1978, with a. section on Keypunching . instructions by L. 0. Wilch, and L. D. North: U.S. Geological Survey Saudi Arabian Project Report 241, 42 p. (U.S. Geological Survey Open-File Report 79-591).

Wright, C. M., 1965, Syngenetic pyrite associated with a Precambrian iron ore deposit: Economic Geology, v. 60, p. 998-1019.

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A.

APPENDIX 1

List of surface sample areas (gossans) and sample numbers

Area A

87892-897 87938-939

Area B

87850-863 87864-873 87874-881 87882-889 87890-891

Area C

87824-829 87830-835 87836-838 87839-849

Area D

87811-815 87816-823

Area E

87730-749 87750-774 87775-810 87898-914

Area F

87718-729

Area G

87681-717

Area H

87645-655 87656-680 87915-922

Area I

87586-600 87601-611 87612-622 87623-624 87625-629 87630-639 87640-644 87923-939

Area J

87569-585

Area K

87553-568

Area L

87470-477 87500-506 87507-531 87532-533 87534-545 87546-552

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B* Areas of gossan blocks (in square meters)

A. 17,519

B. 105,114

C. 19,876

D. 24,239

E. 289,778

F. 34,912

G. 35,620

H. 74,582

I. 76,897

J.

K.

L.

SUBTOTAL

10,930

14,788

60,759

TOTAL

17,520

105,110

19,880

24,240

289,780

34,910

35,600

74,580

76,900

678,520

10,930

14,790

60,760

765,000

not included

in tonnage cal­

culations

56

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C. Descriptions and geochemical data for gossan samples

Description codes (pages 58-66); Wilch, 1978)

Column* Field Code Meaning

11 rock type A12 sample type B13 sample source A14 rock type Y17 matrix A19 oxidation state A21 ore minerals D22 mineral deposit

form D 24 geologic age D

25-26 rock name GO 28 area

29 subarea

rockcompositeoutcropothersilicaoxidizedother

massive sulfidelate Precambriangossanalphabetic code refersto areas as on figure2 (see text, p. 21)numeric code (seeBlain, 1981, fig. 13,for location ofsubarea)

* numbers read vertically on listing

Geochemical data: AA, atomic absorption analysis; P, partial digestion; T, total digestion; CM, colorimetric analysis. Cu, copper; Pb, lead; Zn, zinc; Ag, silver; Co, cobalt; Ni, nickel; Mo, molybdenum; Cr, chromium; Mn, manganese. N, not detected at value stated; L, less than value stated; B, not analyzed.

57

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Page 65: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

RASS II ROCK ANALYSIS STORAGE SYSTEM FOR GEOCHEHICAL DATA PROGRAM NO, B36C ( 3/ 1/79)

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Page 66: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

RASS II - ROCK ANALYSIS STORAGE SYSTEM FOR CEOCHEMICAL DATA PROGRAM NO, B360 1/79)

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Page 67: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

RASS II - ROCK ANALYSIS STORAGE SYSTEH FOR GEOCHEHICAL DATA PROGRAH NO, B860 ( 3/ 1/79)

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Page 68: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

RASS II - ROCK ANALYSIS STORAGE SYSTEM FOR GEOCHEHICAL DATA PftOGRAH NO, B860 ( 3/ 1/79)

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RASS II - ROCK ANALYSIS STORAGE SYSTEM FOR GEOCHEHICAL DATA PROGRAM NO, B860 ( 3/ 1/79)

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Page 70: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

RASS II - ROCK ANALYSIS STORAGE SYSTEM FOR GEOCHEMICAL BATA PROGRAM NO, B860 ( 3/ 1/79)

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Page 71: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

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Page 72: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

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GOSSANS AT WADI UASSAT KINGDOM OF SAUDI ARABIA (CONTINUED)

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GOSSANS AT UADI UASSAT KINGDOM OF SAUDI ARABIA (CONTINUE*)

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Page 78: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

GOSSANS AT UADI WASSAT KINGDOM OF SAUDI ARABIA (CONTINUED

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Page 79: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

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Page 84: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

GOSSANS AT UADI HASSAT KINGDOM OF SAUDI ARABIA (CONTINUED)

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GOSSANS AT WABI WASSAT KINGDOM OF SAUDI ARABIA (CONTINUED)

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Page 86: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

GOSSANS AT KADI UASSAT KINGDOM CF SAUDI ARABIA (CONTINUED)

SAHPLE LATITUDE LONGITUD AA-CU-P AA-PB-P AA-ZN-P AA-CO-P AA-NI-P AA-A8-T Ch-hQ CH-Cft

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GOSSANS AT yADI WASSAT KINGDOM OF SAUDI ARABIA (CONTINUED)

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GOSSANS AT WADI WASSAT KINGDOM OF SAUDI ARABIA (CONTINUED)

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GOSSANS AT WADI JJASSAT KINGOON OF SAUDI ARABIA (CONTINUED)

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Page 90: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

GOSSANS AT WABI UASSAT KINGDOM OF SAUDI ARABIA (CONTINUED)

SAMPLE LATITUDE LON6ITUD AA-CU-P AA-PB-P AA-ZN-P AA-CO-P AA-NI-P AA-AG-T CH-HO CH-CR

8787487875878768787787878

8787987880878818788287883

8788487885878868788787888

8788987890878918789287893

8789487895878968789787898

8789987900879018790287903

8790487905879068790787908

8790987910879118791287913

8791487915

18 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

18 2318 2218 2318 2418 24

18 2418 2418 2418 2418 21

18 2118 2118 2118 2118 21

18 2118 2118 2118 2118 21

18 2118 2118 2118 2118 21

IS 2118 20

31N31N31N31N31N

31N31N31N27N27N

27N27N27N27N27N

27N42N45N05N05N

05N04N04N04NUN

IONIONIONIONION

ION09N09N09N09N

09N09N08Nm08N

08N14N

44 13 27E44 13 28E44 13 28E44 13 29E44 13 29E

44 13 30E44 13 30E44 13 31E44 13 27E44 13 27E

44 13 28E44 13 28E44 13 29E44 13 29E44 13 30E

44 13 30E44 13 39E44 13 29E44 13 17E44 13 17E

44 13 17E44 13 18E44 13 19E44 13 19E44 12 42E

44 12 42E44 12 43E44 12 44E44 12 44E44 12 45E

44 12 46E44 12 46E44 12 47E44 12 48E44 12 49E

44 12 49E44 12 Jk)E44 12 51E4', 12 52E44 12 52E

44 12 53E44 12 22E

30.000015.000015.000015.000015.0000

10.000015.000025,000025.000025.0000

30.000025.00005.000010.000010.0000

10.00005.000030.000010.000010,0000

10,00005,000020,000030,000015,0000

10,000010,000010,000010,000010,0000

5,000010,000030,000050,000040,0000

10,000020,00005,000010,000010,0000

15,000020,0000

20,000030,000015,000020,000030,0000

10,000010,000015,000045,000015,0000

20,000020,000015,000015,000025,0000

20,000020,000025,000020,000020,0000

35,000015,000020,000015,000020,0000

10.0000L10,000010,000025,000010,0000

15,000010.0000L35,000015.000010,0000

20,000020,000015,000015,000010,0000

30,000020,0000

30,000015,000015,000015,000020,0000

10,000015,000020,000025,000020,0000

15,000020,000020,000010,000020,0000

15,000025,000015,000030,000015,0000

20,000010,000020,000025,000020,0000

10,000010,000010,000020,000010,0000

10,000010,000040,000030,000025,0000

20,000020,000015,000020,000015,0000

20,000020,0000

25,000010,000010,000020,000020,0000

15,000015,000015,000030,000020,0000

10.0000L10,000010,000010.0000L15,0000

15,000010,000030,000015,000025,0000

25,000025,000015,000020,000015,0000

10.0000L10,000010,OOOOL15,000010,OOOOL

10,000010,OOOON35,000040,000020,0000

25,000015,000015,000010,000010.0000

25,000030,0000

20,000040,000030,000035,000025,0000

30,000035,000020,000025,000030,0000

35,000035,000020,000030,000025,0000

30,000030,000045,000035,000050,0000

20,000020,000030,000035,000020,0000

30,000030,000035,000020,000035,0000

20,000020,000025,000040,000030,0000

45,000025,000035,000030,000015,0000

25,000030,0000

0,5000N2,50001,75002,50000.5000N

1,75002,50003,00000.5000N1,7000

1,70003,70000.5000N1,70001,7000

1,70000.5000N1,70004,20003,0000

0.5000N3,00002,50003,00000.5000N

1,70001,70001,70000.5000N0,7000

1,70000,70000.5000N2,50001,7000

2,50000.5000N1,70001,70000,7000

0.5000N3,7000

5,00005.0000L5.0000L5,GOQOL5.0000L

5.0000L5.0000L5.0000L5,00005.0000L

5,00005,00005,00005,00005,0000

5,00005,0000

20,000030,000020,0000

20,000020,000010,000040,00005,0000

5.0000L5,OOOOL5.0000L5.0000L5.0000L

5.0000L5»OOOOL5.0000L5,000015,0000

10,000010,000015,000020,000020,0000

60,000030,0000

700,000035,000040,000060,0000325,0000

90,0000100,0000200,0000225,000050,0000

60,000080,0000750,000030,000030,0000

35,0000275,000040,000060,000030,0000

1200,000035,000085,000050,0000300,0000

40,0000195,000070,0000150,0000105,0000

120,0000155,00001000,000090,000080,0000

70,0000150,000070,000050,000070,0000

150.000060,0000

85

Page 91: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

GOSSANS AT UADI UASSAT KINGDOM OF SAUDI ARABIA (CONTINUED}

SAHPLE LATITUDE LONGITUD AA-HN-P

8787487875878768787787878

8787987880878818788287883

8788487885878868788787888

8788987890878918789287893

8789487895878968789787898

87399&7900879018790287903

8790487905879068790737908

8790987910879118791287913

8791487915

1818181818

1818181818

1818181818

1818181818

1313181818

1818181318

18181818IB

1818181818

1818

2323232323

2323232323

2323232323

2322232424

2424242421

2121212121

2121212121

2121212121

2120

31N31N31N31N31N

31N31N31N27N27N

27N27N27N27N27N

27N42N45N05N05N

05N04N04N04NUN

IONIONIONIONION

ION09N09N09N09N

09NmOSN08NOSN

08N14N

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

1313131313

1313131313

1313131313

1313131313

1313131312

1212121212

1212121212

1212121212

1212

27E28E28E29E29E

30E30E31E27E27E

28E28£29E29E30E

30£39£29E17E17E

17E18E19E19E42E

42E43E44E44E45E

46E46E47E48E49E

49E50E51E52E52E

53E22E

95, 000075,000085,

125,00000000

125,0000

85,85,

110,175,145,

170,

00000000000000000000

0000225,000080,000055,75,

65,115,55,100,30,

45,30,40,

350,45,

125,70,75,

00000000

00000000000000000000

00000000000000000000

000000000000

215,0000125,

100,160,65,

400,115,

65,55,75,65,90,

155,

0000

00000000000000000000

00000000000000000000

0000175,0000

86

Page 92: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

2,8

0000 '0210000 'S2V0000 '0010000 '58

0000*0210000 '00010000 '0120000 'S20000 '06

0000 *OS£0000 *OVOOOO'SOI0000 '080000 'S28

0000*060000 '080000 '0V0000 '0060000 'SV

0000 'OS0000 'SV0000 '002OQOQ'OV0000 'OS

0000*02OOOO'Sl0000 'SOOOO'OI

0000 '010000 'SOOOO'OI0000*01OOOO'Sl

0000'02OOOO'OI0000 'S0000 'SOOOO'OI

OOOO'OIOOOO'OI0000 'S0000 'S10000 'S

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0002*1NOOOS'OOOOS'20002*1

0002'!NOOOS'O0002'!0002*10002'!

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0000 *S20000 *OV0000 'S£0000 '0V0000 'S2

0000 '0£0000 *OV0000*020000*090000 *SV

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Page 93: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

GOSSANS AT UADI fcASSAT KINGDOM OF SAUDI A8ABJ

SAHPLE LATITUDE LON6ITUD AA-MN-P

8791637917379188791987920

87921879228792387924S7925

8792687927879288792987930

8793187932879338793487935

8793687937S793887939

1818181818

1818181818

1818181818

1818181818

18181818

2020202020

2020202020

2020202020

2020202020

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14N15N15N15N16N

16N16H58N58N58N

58H58K5SN58H58N

58N57N57N57N56*

56N56N20N20N

4444444444

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4444444444

4444444444

44444444

1212121212

1212111111

1111111111

1111111111

11111313

22E23E23E23E24E

24E24C44E44E44E

44E45E45E45E46E

46E46E47E47E47E

47E47E16E18E

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15024012012565

80851205550

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88

Page 94: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

APPENDIX 2

A.

Locations, altitudes, azimuths, and inclinations of

diamond drill holes

[Elevations by Wallace an

d Tiernan Altimeter calibrated in 10

-m divisions, referred to

reference points an

d existing 1:10,000-scale 10

-m contour interval topographic map. Holes

located on

1:14,000-scale pl

ates

. Geodetic locations referred to Station "A

stro

" as

located on

1:50,000-scale photomosaic sheet 9F

, covering lat

18°15' to 18°30' N. ;

lo

ng

44°00' to

44°30' E.

Location of "Astro", lat

18°24'41" N.

, long

44°13'13" E.

]

Dril

l number

WS-1

CD

WS-2

oWS-3

WS-4

WS-5

WS-6

WS-7

WS-8

WS-9

Approximate location

latitude

(nor

th)

18°2

4'06

"

18°2

3'16

"

18°2

3I13"

18°2

3'45

"

18°24'04"

18°20'35"

18°21'20"

18°20'21"

18°21 '16

"

longitude

(eas

t)

44°13'16"

44°13'32"

44°13'34"

44°13

I27"

44°13'20"

44°12'43"

44°13'03"

44°12'18"

44°11'35"

Approximate

elevation

(meters)

1,203

1,21

4

1,215

1,200

1,201

1,235

1,225

1,244

1,265

Direction

S.67

°E.

West

West

N.80

°E.

S.72

°E.

S.67

°E.

N.65°W.

N.45°E.

N.75°W.

Inclination

-45°

-45°

-45°

-45°

-60°

-45°

-45°

-45°

-45°

Depth

(met

ers)

139.5

37.0

158.6

129.9

103.0

91.5

138.5

152.6

154.4

Remarks

Aborted

Pyrrhotite

Pyrrhotite

1,100.0

Page 95: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

B. List of samples from drill holes

[Zones are indicated on drill holes section, figure 6. Lithology: V-S, volcanic and sedimentary rocks; D sul, disseminated sulfides; M sul, massive sulfides; D + M sul, disseminated and massive sulfides. Areas shown on figure 2]

Depth (meters) Sample numbers Zones Lithology

Area A

WS-1

0-30

30-51

48.75-58

58-75

75-80 80-83 83-101.4

101.4-113

113-132.6

WS-5

0-50

54-56.5 54-70.1

70.1-78 73-89.4

90-103

Area C

WS-3

0-29.5 29.5-37 37-47

47-59 59-79 62-67

79.3-94

107010-107012

107013-017025 107282-107286 107214-107221

107222-107238

107239-107241 107242-107244 107027-107052 107245-107256

107257-107,281

107413-107446

107159-107160 107447-107461 107462-107470 107161-107169

107471-107482

107287-107302 107303-107309 107310-107314

107057-107064 107065-107084 107315-107318 107085-107098

1 0-30 m

30-^3 2

43-58

3 58-75

75-86 4 86-109

109-113

5 113-139

1 0-50

2 50-73 73-83 83-90

3 90-103

1 0-47

2 47-94

Gossan + V-S

M sul

D sul

V-S

D sul Msul D sul

V-S

D sul

D + M sul M sul D sul

V-S

V-S

M sul

91

Page 96: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

B. List of samples

Depth (meters)

WS-3 (cont.)

94-9696-101 103-121 101-121 121-132

133-153.6

Area B

WS-4

0-28

28-^3 28-43 43-56.4 55-64.9

64.4-74

74-85.3 85-95.5 92-94.5

95.5-117

117-129.9

Area F

WS-6

0-35 35-63 63-91.5

Area E

WS-7

0-24

24-8467-67.582-82.5

84-126

126-138.5

from drill holes

Sample numbers

107099-107100 107319-107323 107101-107116 107324-107327 107328-107337

107338-107356

[continued]

Zones Lithology

107357-107360

107361-107368 107117-107121 107122-107134 107369-107375 107376-107383

107384-107393 107394-107401 107135-107146 107147-107158

107402-107412

107483-107499 107600-107613 107614-107625

107626-107639

107640-107670107212107213

107671-107702

107703-107711

94-103 D sul3 103-121 M sul

121-132 D sul

4 132-153.6 V-S

0-28

28-392 39-61

61-74

V-S

M sul, V-S M sul D sul

74-87 D + M sul 3 87-117 M sul

4 117-129.9 D sul

1 0-35 V-S2 35-63 M sul3 63-91.5 D sul

1 0-24 V-S

24^84 M sul2

3 84-126 D + M sul

4 126-138.5 V-S

92

Page 97: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

B. List of samples from drill holes

Depth (meters)

Area H

WS-8

0-38

39^4.3 44.3-64

44-65 70-71.4 65-74.9

74.9-87

85-87

87-95

95-121

121-152.6

Area I

WS-9

0-4141-42

42-52 44-45.5 50-51.6 52-53

67-67.8 53-128

130-141 123-129141-142142-154.4

Sample numbers

[continued]

Zones

107712-107722

107170-107174107175-107185107723-107728107186107729-107735107211107736-107744

107187-107188

107745-107799

107750-107763

107764-107787

107788-107794 107189

107190-107197 107795-107797

107198 107798-107851

107199-107210 107852-107853

107854-107863

1 0-38

38-82

82-87

3 87-95

4 95-121

5 121-135 135-152.6

1 0-42

2 42-53

3 53-128

4 128-142

5 142-154.4

Lithology

V-S

M sul

M sul, V-S

V-S

D + M sul

V-SD sul, V-S

Gossan + V-S

M sul

Diorite

M sul

Diorite

93

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SAMPLE

C. ANALYSES OF CORE SAMPLES

[See page 57 for description of geochemical data]

LATITUDE LONGITUD AA-CU-P AA-PB-P AA-ZN-P AA-AG-P AA-CO-P AA-NI-P CM-MO AA-CR-T

107010107011107012107013107014

107015107016107017107018107019

107020107021107022107023107024

107025107027107028107029107030

107031107032107033107034107035

107036107037107038107039107040

107041107042107043107044107045

107046107047107048107049107050

107051107052

18 2418 2418 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 24

06N06N06N06N06N

06N06N06N06N06N

06N06N06N06N06N

06N06N06N06N06N

06N06N06N06N06N

06N06N06N06N06N

06N06N06N06N06N

06N06N06N06N06N

06N06N

44 13 16E44 13 16E44 13 16E44 13 16E44 13 16E

44 13 16E44 13 16E44 13 16E44 13 16E44 13 16E

44 13 16E44 13 16E44 13 16E44 13 16E44 13 16E

44 13 16E44 13 16E44 13 16E44 13 16E44 13 16E

44 13 16E44 13 16E44 13 16E44 13 16E44 13 16E

44 13 16E44 13 16E44 13 16E44 13 16E44 13 16E

44 13 16E44 13 16E44 13 16E44 13 16E44 13 16E

44 13 16E44 13 16E44 13 16E44 13 16E44 13 16E

44 13 16E44 13 16E

3,00003,000012,000014,000025,0000

29,000016,000018,000018,000012,0000

18,000038,000099,0000150,000029,0000

O.OOOOB34,000028,000021,000015,0000

25,000021,000020,000049,000078,0000

70,000019,000015,000010,000014,0000

15,000017,000015,000016,000022,0000

16,0000155,000028,000014,000012,0000

13,000012,0000

33,000036,000069,000069,000043,0000

84,000069,000075,000090,000090,0000

60,000069,000069,000075,000036,0000

O.OOOOB36,000024,000069,000084,0000

84,0000110,0000126,0000110,000069,0000

75,0000117,000056,0000100,000080,0000

90,000092,0000110,0000110,000092,0000

97,000092,000092,000092,000090,0000

90.000090,0000

10,000010,000020,000019,000050,0000

45,000050,000050,000060,000045,0000

51,000030,000033,000038,000040,0000

O.OOOOB85,000077,000060,000042,0000

73,000048,000042,000045,000080,0000

80,000057,000040,000035,000030,0000

40,000029,000030,000029,000030,0000

43,000037,000032,000035,000024,0000

31,000033,0000

1,15000,90000,25000,50000,4000

0,40000,40000,40000,40000,4000

0,25000.1000N0,40000.100W0,5000

O.OOOOB0,25000,40000.1000N0,4000

0,40000,40000,50000,50000,5000

0,40000,40000,50000,70000,6000

0,40000,70000,40000,50000,4000

0,40000,40000,25000,40000,4000

0,50000,5000

50,000060,0000

223,0000195,0000200,0000

145,0000170,0000108,0000183,0000158,0000

165,0000185,0000233,0000275,000068,0000

O.OOOOB165,0000120.0000145,0000210,0000

158,0000210,0000195,0000183,0000108,0000

133,0000183,0000210,0000215,0000195,0000

210,0000250,0000210,0000275,0000250,0000

210,0000223,0000215,0000215,0000233,0000

240,0000210,0000

23,000035,000067,000041,000078,0000

67,000067,000060,000060,000060,0000

73,000067,000060,000094,000041,0000

O.OOOOB73,000060,000055,000067,0000

50,000073,000073,000064,000073,0000

87,0000100,000067,000067,000087,0000

55,000080,000060,000080,000080,0000

55,000073,000064,000064,000050,0000

67,000057,0000

20,000020,00005.0000L5.0000L5.0000L

5.0000L5.0000L5,00005.0000L5.0000L

5.0000L5.0000L5.0000L5.000015.0000L

O.OOOOB5.0000L5.0000L5.0000L5.0000L

5.0000L5,00005,00005,00005.0000L

5,000010,00005.0000L5,00005,0000

5,000010,00005,000010,00005.0000L

5.0000L5.0000L5.0000L5.0000L5.0000L

5.000015.0000L

20.0000N20.0000N20.0000N20.0000N20.0000N

20.0000N20.0000N20.0000N20.0000N20.0000N

20.0000N20.0000N20.0000N20.0000N20.0000N

O.OOOOB20.0000N20.0000N20.0000N20.0000N

20.0000N20.0000N20.0000N20.0000N20.0000N

20.0000N20.0000N20.0000N20.0000N20.0000N

20.0000N20.0000N20.0000N20.0000N20.0000N

20.0000N20.0000N20.0000N20.0000N20.0000N

20.0000N20.0000N

94

Page 99: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAHPLES (CONTINUED)

SAHPLE LATITUDE LONGITUD AA-HN-P

107010 107011 107012 107013 107014

107015107016107017107018107019

107020107021107022107023107024

107025107027107028107029107030

107031107032107033107034107035

107036107037107038107039107040

107041107042107043107044107045

107046107047107048107049107050

107051107052

18 18 18 18 18

13IS181818

1818181818

1818181818

181818IS18

1818181818

1818181818

1818131818

1818

24 24 24 24 24

2424242424

2424242424

2424242424

2424242424

2424242424

2424242424

2424"sis.

24

2424

06N 06N 06N 06N06N

06N06H06N06N06N

06N06N06N06306N

Q6N06N06N06N06N

06N06N06*106N06H

06N06N06M

06Nm

06H06M06N06NOdN

m06^«%>:!W$06JI

06NWN

44 44 44 44 44

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

13 13 13 13 13

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313131311

1313

16E 16E 16E 16E 16E

16E16E16E16E16E

16E16E16E16E16E

16E16E16E16E16E

16E16E16E16E16E

16E16E16E16E16E

!6E16E16E16E16E

16E16E16E16E16E

16E

8.0000 9,0000 2,0000 22,0000

560,0000

850,0000850,00001000,0000830,0000565,0000

560280242680355

0500430

,0000,0000,0000.0000,0000

,00008,0000,0000

430*0000145

680280245322970

830312192

,0000

,0000,0000,0000,0000,0000

.0000,0000,0000

182,0000155

245312312210245

150355185430375

265

,0000

,0000,0000.0000,0000,0000

,0000,0000,0000,0000,0000

,0000m 312,0000

95

Page 100: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAMPLES (CONTINUED)

SAMPLE LATITUDE LONGITUD AA-CU-P AA-PB-P AA-ZN-P AA-AG-P AA-CO-P AA-NI-P CH-HO AA-CR-T

107057107058107059107060107061

107062107063107064107065107066

107067107068107069107070107071

107072107073107074107075107076

10707710707S107079107080107081

107082107083107084107085107086

107087107088107089107090107091

107092107093107094107095107096

107097107098

18 23 13N18 23 13N18 23 13N18 23 13N18 23 13N

18 23 13N18 23 13N18 23 13N18 23 13N18 23 13N

18 23 13N18 23 13N18 23 13N18 23 13N18 23 13N

18 23 13N18 23 13N18 23 13N18 23 13N18 23 13N

18 23 13N18 23 13N18 23 13N18 23 13N18 23 13N

18 23 13N18 23 13N18 23 13N18 23 13N18 23 13N

18 23 13N18 23 13N18 23 13N18 23 13N18 23 13N

18 23 13N18 23 13N18 23 13N18 23 13N18 23 13N

18 23 13N18 23 13N

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

13 34E13 34E13 34E13 34E13 34E

13 34E13 34E13 34E13 34E13 34E

13 34E13 34E13 34E13 34E13 34E

13 34E13 34E13 34E1.3 34E13 34E

13 34E13 34E13 34E13 34E13 34E

13 34E13 34E13 34E13 34E13 34E

13 34E13 34E13 34E13 34E13 34E

13 34E13 34E13 34E13 34E13 34E

13 34E13 34E

12.000012.000012.000021.000016.0000

16.000020.000011.000014.000012.0000

34.000011.000012.000012.000012.0000

20,000014.000016.000012.000011.0000

9.000012.000012.000010.000010.0000

11.000012.000018.000014.000017,0000

15.000016.000018.000014.000015.0000

30,000029.000030.000031.000019.0000

21.000020.0000

84.000090.000080.000075.000084.0000

75.000075.000084.000092,000084.0000

50.0000100,000090,000069.000090.0000

90.000063.000075.0000117.0000110.0000

92.0000110.000097.0000100.0000117.0000

105.0000110.0000114.0000105.0000105.0000

114,0000110,0000102.000092.000090.0000

92.000090.000090.000080.0000100.0000

75.0000110,0000

16.000018.000015.000024.000020.0000

24.000024.000025.000022.000024.0000

130.000024.000032.000058.000033.0000

35.000027.000031.000031.000033.0000

27.000030.000031.000024.000029.0000

38.000040.000037.000038.000040.0000

33.000037,000038.000043.000044.0000

55,000045.000057.000058.000040.0000

64.000071.0000

0.1000N0.40000.40000.20000.1000N

0.1000N0.1000N0.1000N0.20000.1000N

0.50000.40000.20000.20000.1000N

0.1000N0.1000N0.1000N0.40000.1000N

0.40000.40000.60000.60000,3000

0.25000.45000.30000.30000.3000

0.20000.30000.20000.20000,2500

0,40000,40000,40000,40000,4500

0,40000.5000

233.0000240.0000183.0000233,0000215.0000

223,0000263,0000190,0000223,0000210.0000

73.0000223.0000190.0000150.0000210.0000

233.0000183.0000215.0000195,0000233.0000

195.0000233,0000210,0000210,0000190,0000

210,0000230.0000223.0000210.0000215.0000

210.0000190.0000233.0000170.0000145.0000

133.0000133.0000115.0000145.0000158.0000

128.0000140.0000

67.000060.000060.000067.000050.0000

48,000055.000055.000064.000048.0000

41.000057.000060.000057.000055.0000

50.000055,000067,000064,000055,0000

67,000078,000073,000057,000060,0000

64,000067,000070,000070,000073,0000

67.000055.000055.000067.000050.0000

67,000055.000055,000087,000067,0000

78,000070.0000

5.0000L5.0000L5.0000L5.0000L5.0000L

5.0000L5.0000L5.0000L5.0000L5.0000L

5.0000L5.0000L5,OOOOL5,OOOOL5.0000L

5.0000L5,OOOOL10.00005.0000L5.0000L

5.0000L5.0000L5,000010,00005.0000

5.0000L5,00005,000010,00005 ,00001

5.0000LSrOOOOL5.0000L5,OOOOL5,00001

5.0000L5,OOOOL5,OOOOL5.0000L5.0000L

5.0000L5,OOOOL

20.0000N20,0000*120.0000N20.0000N20.0000N

20.0000N20.0000M20,0000*120»OOOON20.0000M

20,OOOON20,00001120.0000N20.0000N20.0000N

20,OOOON20.0000N20.0000N20.0000H20.0000N

20.0000N20,OOOON20.0000N20.0000N20.0000N

20,OOOON20.0000N20,OOOON20.0000N20.0000N

20.0000N20.0000N20.0000N20.0000N20»OOOON

20.0000N20.0000N20.0000N20.0000N20.0000N

20*OOOON20.0000N

96

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ANALYSIS OF CORE SAMPLES (CONTINUED)

SAHPLE LATITUDE LONGITUD AA-HN-P

107057107058107059107060107041

107062107063107064107065107066

107067107068107069107070107071

107072107073107074107075107076

107077107078107079107080107081

107082107083107084107085107086

107087107088107089107090107091

107092107093107094107095107096

107097107098

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818

2323232323

2323232323

2323232323

2323232323

2323232323

2323232323

2323232323

2323232323

2323

13N13N13N13N13N

13N13N13N13N13N

13N13N13N13N13N

13N13N13N13N13N

13N13N13N13H13N

13N13N13N13N13N

13N13N13N13N13N

13N13N13N13N13N

13N13N

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E34E

34E34E

27,000050.000028,000060,000020,0000

32.000027,000065.0000122,000085,0000

700.000058.000075,0000275,000085,0000

240.0000275,0000225.0000400,0000230,0000

200,0000270,0000162.0000200,0000235.0000

280,0000230,0000115.0000180,0000130,0000

135,0000140,0000142,0000255,0000220,0000

455,0000322,0000300.0000368,0000292,0000

430,0000500,0000

97

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ANALYSIS OF CORE SAHPLES (CONTINUED)

SAHPLE LATITUDE LONGITUD AA-CU-P AA-PB-P AA-ZN-P AA-AG-P AA-CO-P AA-NI-P CH-HO AA-CR-T

107099107100107101107102107103

107104107105107106107107107108

107109107110107111107112107113

107114107115107116107117107118

107119107120107121107122107123

107124107125i07l2cio/i27107128

107129107130107131107132107133

107134107135107136107137107138

107139107140

18 2318 2318 2318 2318 23

. 18 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

18 2318 2318 2313 2318 23

18 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

18 2318 23

13Nmm13N13N

13N13N13N13N13N

13N13N13N13N13N

13N13N13N45N45N

45N45N45N45N45N

45N45N45N45N45N

45N45N45N45N45N

45N45N45N45N45N

45N45N

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E

38,000034,000018,000016,000014,0000

12,000012,000012,000016,000016,0000

30,000029,000018,000025,000042,0000

32,000020,000044,000019,000029,0000

80,000032,000021,000027,000022,0000

15,000024,000034,000016,000016,0000

30,000044,000026,000024,000031,0000

27,000016,000014,000029,000019,0000

18,000021,0000

117,000092,0000126,0000105,0000105,0000

131,000084,000095,0000117,0000110,0000

113,000090,0000100,0000100,000084,0000

75,000084,0000

100,000025,0000126,0000

126,000090,000097,000097,0000110,0000

110,0000110,000080,000092,000097,0000

75,000050,000069,000075,000069,0000

78,000097,000084,000092,000090,0000

84,000050,0000

60,000073,000037,000029,000031,0000

25,000025,000026,000035,000055,0000

45,000040,000026,000045,000055,0000

45,000031,000030,000021,000022,0000

28,000026,000025,000022,000026,0000

25,000028,000080,000026,000057,0000

57,000045,000045,000090,000035,0000

45,000035,000052,000068,000044,0000

45,000057,0000

0,25000,25000,40000,20000,2000

0,25000,30000,25000,25000,4000

0,40000,40000,25000,25000,2500

0,50000,25000,40001,70000,2500

0,40000,20000,20000,1000N0.1000N

0,28000.1000N0.1000N0.1000N0.1000N

0,1000N0.1000N0,1000N0.1000N0.1000N

0.1000N0,1000N0.1000N0,1000N0.1000N

0.1000N0.1000N

128,000098,0000178,0000158,0000158,0000

170,0000200,0000210,0000170,0000170,0000

108,0000165,0000233,0000165,0000158,0000

145,0000178,0000183,000028,0000

230,0000

195,0000183,0000195,0000183,0000210,0000

190,0000210,0000133,0000195,0000170,0000

128,0000145,0000183,0000170,0000210,0000

133,0000178,0000133,0000120,0000150,0000

183,0000195,0000

64,000055,000050,000070,000055,0000

67,000087,000050,000050,000057,0000

60,000060,000060,000050,000055,0000

55,000060,000064,000078,000070,0000

70,000039,000050,000048,000060,0000

60,000078,000070,000060,000064,0000

60,000073,000060,000067,000064,0000

70,000078,000060,000094,000080,0000

94,000087,0000

5,000015,OOOOL5,OOOOL5,OOOOL5.0000L

5,OOOOL5,OOOOL5,000015.0000L5.0000L

5.0000L5.0000L5*000015,OOOOL5.0000L

5,OOOOL5.0000L5,OOOOL5.0000L5,0000

10,00005,00005,OOOOL5,00005,0000

5,OOOOL5.0000L5.0000L5.0000L5.0000L

5,OOOOL5.0000L5.0000L5.0000L5.0000L

5.0000L5,OOOOL5,00005,00005,0000

10,000010,0000

20,OOOON20.0000N20,OOOON20.0000N20.0000N

20.0000N20.0000N20,OOOON20.0000N20,OOOON

20,OOOON20.0000N20.0000N20.0000N20.0000N

20.0000N20.0000N20.0000N20,0000120.0000N

20.0000N20.0000N20.000QN20.0000N20.0000N

20,OOOON20.0000N20.0000N20,OOOON20.0000N

20.0000N20.0000N20,OOOON20,OOOON20.0000N

20.0000N20.0000N20,OOOON20.0000N20.0000N

20.0000N20,OOOON

98

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ANALYSIS OF CORE SAMPLES (CONTINUED)

SAMPLE LATITUDE LONGITUD AA-HN-P

107099107100107101107102107103

107104107105107106107107107108

107109107110107111107112107113

107114107115107116107117107118

107119107120107121107122107123

107124107125107126107127107128

107129107130107131107132107133

107134107135107136107137107138

107U9107140

18 23 13N 44 13 34E 850.000018 23 13N 44 13 34E 455.000018 23 13N 44 13 34E 250.000016 23 13N 44 13 34E 275.000018 23 13N 44 13 34E 375.0000

18 23 13N 44 13 34E 285.000018 23 13N 44 13 34E 260.000018 23 13N 44 13 34E 245.000018 23 13N 44 13 34E 275.000016 23 13N 44 13 34E 220.0000

18 23 13N 44 13 34E 680.000018 23 13N 44 13 34E 425.000018 23 13N 44 13 34E 368.000018 23 13N 44 13 34E 355.000018 23 13N 44 13 34E 430.0000

18 23 13N 44 13 34E 455.000018 23 13N 44 13 34E 255.000018 23 13N 44 13 34E 182.000018 23 45N 44 13 34E 22.000018 23 45X 44 13 34E 170.0000

18 23 45N 44 13 34E 236.000018 23 45M 44 13 34E 172.000018 23 45H 44 13 34E 205.000018 23 45N 44 13 34E 245.000018 23 45H 44 13 34E 355.0000

18 23 45N 44 13 34E 220.000018 23 45H 44 13 34E 298.000018 23 45K 44 13 34E 462.000016 23 45N 44 13 34E 172.000018 23 45N 44 13 34E 192.0000

18 23 45N 44 13 34E 322.000018 23 45H 44 13 34E 560.000018 23 45H 44 13 34E 338.000018 23 45H 44 13 34E 215.000018 23 45N 44 13 34E 325.0000

16 23 45H 44 13 34E 242.000018 23 45N 44 13 34E 125.000018 23 45H 44 13 34E 125.000018 23 45N 44 13 34E 230.000013 23 45H 44 13 34E 145.0000

13 23 4tiN 44 13 34E 135.000018 23 45N 44 13 34E 172.0000

99

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ANALYSIS OF CORE SAMPLES (CONTINUED)

SAHPLE LATITUDE LONGITUD AA-CU-P AA-PB-P AA-ZN-P AA-AG-P AA-CO-P AA-NI-P CH-HO AA-CR-T

107141107142107143107144107145

107146107147107148107149107150

107151107152107153107154107155

107156107157107158107159107160

107161107162107163107164107165

107166107167107168107169107170

107171107172107173107174107175

107176107177107178107179107180

107181107182

18 23 45N18 23 45N18 23 45N18 23 45N18 23 45N

18 23 45N18 23 45N18 23 45N18 23 45N18 23 45N

18 23 45N18 23 45N18 23 45N18 23 45N18 23 45N

18 23 45N18 23 45N18 23 45N18 24 04N18 24 04N

18 24 04N18 24 04N18 24 04N18 24 04N18 24 04N

IS 24 04N18 24 04N18 24 04H18 24 04N18 20 21N

18 20 21N18 20 21M18 20 21N18 20 21N18 20 21N

18 20 21N18 20 21N18 20 21N18 20 21M18 20 21N

18 20 21M18 20 21N

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

13 34E13 34E13 34E13 34E13 34E

13 34E13 34E13 34E13 34£13 34E

13 34E13 34E13 34E13 34E13 34E

13 34E13 34E13 34E13 34E13 34E

13 34E13 34E13 34E13 34E13 34E

13 34E13 34E13 34E13 34E12 18E

12 18E12 18E12 18E12 18E12 18E

12 18E12 18E12 18E12 18E12 18E

12 18E12 18E

14,000012,000019,0000130,000070,0000

14,00008,000011,000014,000015,0000

10,000011,000012,000014,000019,0000

11,000016,000021,000015,000029,0000

163,000060,000019,000015,000028,0000

19,000029,0000O.OOOOB0,00006

38,0000

38,000068,000060,000043,000050,0000

73,000047,000059,000043,000050,0000

43,000047,0000

53,000060,000069,000043,000072,0000

69,000072,000092,000092,0000117,0000

170,000084,000090,000075,000060,0000

60,000075,000060,000075,000084,0000

69,000092,0000100,0000110,000092,0000

69,000050,00000,000060,00006

60,0000

50,0000110,0000110,0000100,0000100,0000

92,000084,000092,000090,000075,0000

56,000075,0000

48,000033,000028,000029,000026,0000

26,000029,000026,000024,000031,0000

37,000035,000031,000042,000040,0000

42,000037,000035,000040,000045,0000

48,000037,000031,000064,000040,0000

42,000040,00000,000060,OOOOB45,0000

52,000031,000045,000058,0000110,0000

55,000048,000060,000048,000076,0000

70,000053,0000

0,1000N0.1000N0.1000N0.1000N0.1000N

0,1000N0.1000N0.1000N0,1000N0,1000N

0,1000N0,1000N0,iOOON0,1000N0,1000N

0,1000N0,14000,1000N0.1000N0.1000N

0,34000,1000N0,14000.1000N0,1000N

0,1000N0,28000,000080,OOOOB0,6500

0,50001,20000,65000,90001,5000

1,30001,45001.60000,90002,4500

2,85002,6000

170,0000170,0000195,0000150,0000195,0000

183,0000183,0000170,0000195,0000210,0000

183,0000183,0000183,0000183,0000178,0000

183,0000190,0000170,0000170,0000115,0000

223,0000195,0000165,0000190,0000223.0000

210,0000158,00000,00006O.OOOOB

170,0000

145,0000215,0000190,0000158,0000233,0000

230,0000263,0000223,0000150,0000255,0000

158,0000215,0000

100,000070,000064,000073,000055,0000

60,000057,000067,000060,000094,0000

73,000067,000080,000060,000080,0000

70,000064,000067,000073,000073,0000

145,000094,000087,000067,000087,0000

80,000080,0000O.OOOOBO.OOOOB

55,0000

55,000055,000055,000064,000073,0000

80,000090,000080,000060,0000

100,0000

78,000087,0000

10,00005.00005.00005.00005,0000

5,00005,00005,00005,000010,0000

10,00005,00005,000010,00005,0000

5,00005,00005,00005,000010,0000

5,00005,00005,00005,000010,0000

5,00005,00000,00006O.OOOOB

10,0000

5,OOOOL5<OOOOL5.0000L5.0000L5,OOOOL

5.0000L5.0000L5,OOOOL5.0000L5,OOOOL

5.0000L5.0000L

20.0000N20,OOOON20.0000N20,OOOON20,OOOON

20.0000N20.0000N20.0000N20.0000N20,OOOON

20.0000N20.0000N20.0000N20,OOOON20.0000N

20,OOOON20.0000N20.0000N20.0COON20.0000N

20.0000N20.0000N20.0000N20.0000M20.0000N

20.0000N20.0000NO.OOOOBO.OOOOB

20.0000N

20.0000N20.0000N20.0000N20.0000M20.0000N

20.0000N20.0000N20.0000N20.0000N20.0000N

20.0000N20.0000N

100

Page 105: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAMPLES (CONTINUED)

SAMPLE LATITUDE LQNGITUD AA-MN-P

107141107142107143107144107145

107146107147107148107149107150

107151107152107153107154107155

107156107157107158107159107160

107161107162107163107164107165

107166107U7107168107169107170

107171107172107173107174107175

107176107177107178107179107180

107181107132

1818181818

1818181818

1818181818

1818181818

1818181818

1818181813

1818181818

1818181818

1818

2323232323

2323232323

2323232323

2323232424

2424242424

2424242420

2020202020

2020202020

2020

45H45N45N45N45N

45N45N45N45N45N

45N45N45N45N45N

45N45N45N04H04N

04H04N04N04N04N

04M04N04N04N21N

21N21H21M21N21N

21H21H21N21N21H

21H21N

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

44

44444444

4444444444

4444

1313131313

13IS131313

1313131313

1313131313

1313131313

1313131312

1212121212

1212121212

1212

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E18E

18E18E18E18E1S£

i8E18E18E18E18E

18EiSt

120*0000130*0000192.0000215,0000100*0000

172.0000290.0000168.000082.0000

305*0000

275 ,0000275*0000342.0000183 .0000182.0000

168150155242180

43511017208105

160220

00

208

2902202705*0

290

3153482tS322265

.0000

.0000

.0000

.0000

.0000

.0000,0000,0000.0000.0000

,0000.0000.OOOOB.OOOOB,0000

.0000,0000,0000*0000,0000

.0000,0000.0000,0000,0000

322,0000318 .0000

101

Page 106: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAHPLES (CONTINUED)

SAHPLE LATITUDE LQNGITUD AA-CU-P AA-PB-P AA-ZN-P AA-AG-P AA-CO-P AA-NI-P CH-HO AA-CR-T

107183107184107185107186107187

107188107189107190107191107192

107193107194107195107196107197

107198107199107200107201107202

107203107204107205107206107207

107208107209107210107214107215

107216107217107218107219107220

107221107222107223107224107225

107226107227

18 20 21N18 20 21N18 20 21N18 20 21N18 20 21N

18 20 21M18 21 16N18 21 16N18 21 16N18 21 16N

18 21 16N18 21 16N18 21 16N18 21 16N18 21 16N

18 21 16N18 21 16N18 21 16N18 21 16N18 21 16N

18 21 16N18 21 16N18 21 16N18 21 16N18 21 16N

18 21 16N13 21 16N18 21 16N18 24 06N18 24 06N

18 24 06N18 24 06N18 24 06N18 24 06N18 24 06N

18 24 06N18 24 06N18 24 06N18 24 06N18 24 06N

18 24 06N18 24 06N

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

12 18E12 18E12 18E12 18E12 18E

12 18E11 35E11 35E11 35E11 35E

11 35E11 35E11 35E11 35E11 35E

11 35E11 35E11 35E11 35E11 35E

11 35E11 35E11 35E11 35E11 35E

11 35E11 35E11 35E13 16E13 16E

13 16E13 16E13 16E13 16E13 16E

13 16E13 16E13 16E13 16E13 16E

13 16E13 16E

45.000050.000050.000047.000050.0000

65.000082.000070.000078.000061.0000

64.000065.000059.000064.000075.0000

70.000057.000050.000040.000036.0000

48.000042.000042.000050.000048.0000

50.000039.000045.000013.000015.0000

20.000025.000017,000018.000021.0000

20.000013.000023.000022.000031.0000

28.000017.0000

84.000082.000060.0000110.000060.0000

69.000036.000036.0000110.000092.0000

97,000080.000075.000084.0000100.0000

105.0000100.0000110.000092.0000

126.0000

153.000075.000069,000080,000084.0000

82.0000105.000084.000027,000027.0000

24.000024,000025,000017,000017,0000

18.000019,000079.000023.000016.0000

45.000017.0000

43.000055,000050.000066.000050.0000

63.000035.000053.000043.000035.0000

52.000063.000068.000037.000045.0000

35.000045.000048.0000135.000090.0000

50.000073.000035.000071.000053.0000

43.000055.000042.000031.000040.0000

28.000021.000027.000030.000025.0000

30.000032.000022.000043,000023.0000

132.000030.0000

2.25002.10002.25002,05001.9500

2.65003.05002.40002.80002.6000

2,60002.40002.25002.15002.6000

1.95002.40002.95002,95002.4000

2.60002,15002.95002.80002.6500

2.80002.40002,40002,10001.4000

1.50001.60001.00001.50001.3000

1,80001.60001.40001.50001.4000

1,70001,4000

190,0000195.0000215.0000158.0000170.0000

170.0000210.0000158,0000190,0000210.0000

195.0000178,0000158.0000183.0000183.0000

150.0000233.0000183.0000215.0000190.0000

223.0000145.0000195.0000195,0000223,0000

183.0000195.0000170,000025,000033.0000

37,000035,000033,000032,000030.0000

34,000032.000029.000027.000031.0000

40.000029.0000

64,000064,000064.000060.000073.0000

73.0000180.000087,000094.000067,0000

73.000080.000073.000067.000094.0000

73.000080.000084.000087,000094.0000

64.000067,000067,000090,000073,0000

60,000087,000084,000023,000023,0000

22,000021,000020.000022.000023.0000

23,000025,000020,000020,000023.0000

15,000022,0000

5.0000L5.0000L5.0000L5.0000L5.0000L

5.0000L5.0000L5.0000L5.0000L5.0000

5,00005,00005,00005.00005.0000

5.00005.0000L5.0000L5.0000L5.0000L

5.00005,00005.00005,00005,0000

5.000010.000010.00005.0000L5.0000L

5.0000L5.0000L5.0000L5.0000L5.0000L

5.0000L5.0000L5.0000L5.0000L5,00001

5.0000L5.0000L

20.0000N20.0000N20, 000 W20.0000N20.0000N

20.0000N20.0000N20.0000N20.0000N20.0000N

20.0000N20.0000N20, 000 W20.0000N20.0000N

20.0000N20.0000N20.0000N20.0000N20.0000N

20,0000*20.0000N20,0000*20.0000N20.0000N

20,0000*20.0000N20.0000ft20.0000L80.0000

20.0000L20.0000L20.0000L180.0000120,0000

120,000020.0000L85.0000170.000020.0000L

115.000020.0000L

102

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ANALYSIS OF CORE SAMPLES (CONTINUED)

SAMPLE LATITUDE LONGITUD AA-HN-P

107183107184107185107186107187

107188107189107190107191107192

107193107194107195107196107197

107198107199107200107201107202

107203107204107205107206107207

107208107209107210107214107215

107216107217107218107219107220

107221107222107223107224107225

10722610722?

1818181818

1818181818

1818181818

18181818IS

1818181818

1818131818

1818181818

181818!818

1818

2020202020

2021212121

2121212121

2121212121

212121212i

2121212424

2424242424

2424242424

2424

21N21N21N21N21N

21N16N16N16N16N

16N16N16N16N16N

16H16H16H16N16N

16N16N16H16N16N

16N16N16N06H06N

06N06N06NW06N

06K06H06N06Nm

m06H

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444«44444

4444444444

4444

1212121212

1211111111

1111il1111

a111111n

11il11n11

ilil111313

1313131313

1313131313

1313

18E18E13E13E13E

18E35E35E35E35E

35E35E35E35E35E

35E35E35E35E35E

35E35E35E35E35E

35E35E35E16E16E

16£16£16E16E16£

16E16E16E16E16£

16E16E

455.0000278.0000375.0000255.0000462.0000

375.0000198.0000290,0000230,0000245.0000

222.0000472.0000388.000092.0000290.0000

275.0000440.0000308.0000620.0000435.0000

335,0000280.0000200.0000255.0000900.0000

680.0000560,0000620,0000533,0000653.0000

365.0000250.0000305.0000305,0000340.0000

288.0000455,0000365.0000290.0000265.0000

320,0000350,0000

103

Page 108: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAMPLES (CONTINUED)

SAMPLE LATITUDE LONGITUO AA-CU-P AA-PB-P AA-ZN-P AA-AG-P AA-CO-P AA-NI-P CM-HO AA-CR-T

107228107229107230107231107232

107233107234107235107236107237

107238107239107240107241107242

107243107244107245107246107247

107248107249107250107251107252

107253i 0725415725510725^107257

107258107259107260107261107262

107263107264107265107266107267

107268107269

18 2418 2418 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 2*13 2418 2418 24

18 2418 2418 2418 2418 24

18 24IS 24IS 2418 2418 24

18 2418 24

06N06N06N06N06N

06N06N06N06N06N

06*06*106N06N06N

06N06N06N06N06H

06N06M06N06N06N

06N06N06N06K'

06N

06H06M06N06N06N

06N06N06M06M06N

06N06H

44 13 16E44 13 16E44 13 16E44 13 16E44 13 16E

44 13 16E44 13 16E44 13 16E44 13 16E44 13 16E

44 13 16E44 13 16E44 13 16E44 13 16E44 13 16E

44 13 16E44 13 16E44 13 16E44 13 16E44 13 16E

44 13 16E44 13 16E44 13 16E44 13 16E44 13 16E

44 13 16E44 13 16E44 13 16£44 13 16E44 13 16E

44 13 16E44 13 16E44 13 16E44 13 16E44 13 16E

44 13 16E44 13 16E44 13 16E44 13 16E44 13 I6E

44 13 16E44 13 16E

25,000020*000016,000015,000016,0000

20.000026,000045,0000100,000033,0000

22,000036.000038,000028.000037,0000

30,000039,000035,000025,000025,0000

24,000020,000032,000042,000025,0000

43.000073,000096.000022,0000102.0000

117,0000185,0000114,0000142.0000144,0000

139,0000116.0000141.0000152,0000147,0000

150,0000160,0000

25,000014,000013,000024,000034,0000

78,0000351,0000565.0000360,0000179,0000

310,0000135,000029,000030,000032,0000

24,000031,000046,000024,000019.0000

20,000038,000023,000024,000027.0000

23,000031,000020,000017,000025.0000

25,000023.000025,000024.000021.0000

25,000026,000024,000024,000021,0000

25,000020,0000

46,000022,000027.000043,0000110,0000

200,0000540,0000

1180,0000580,0000420,0000

610,0000264,000071,000063.000067.0000

40.000083.000048.000050,000044,0000

110,000019,000026.000036.000026,0000

36,000028,000018,000033,000094,0000

99,000042,000092,0000

870.000052.0000

100,000098,000074,000075,000056,0000

45,000065.0000

3.30001,50001,50001,40001,4000

1,30001,70001,60001,10001.6000

1,40001,50001,20001.20001,1000

1,40000,90001,10001,50001,1000

1,60001,40001.50001.30001,1000

1,30001,50001,40001,40001.4000

1.30001.30001,40001,30001,1000

1,20001,20001,40001,70001,5000

1,50001,3000

32,000031,000030,000027,000026,0000

30,000030,000044.000033.000030,0000

33.000050,000031,000037,000028,0000

37,000031,000036,000037,000036,0000

54,000048,000046,000048,000045,0000

46,000054,000051,000036,000051,0000

47,000070,000036,000047,000035,0000

45,000056,000051,000040,000035,0000

42.000035,0000

12,000023,000017,000018,000015,0000

17,000011,000016,000021,000018,0000

24.000041.000052,000059,000054,0000

72,000055,000030,000030,000051.0000

31,000060,0000149,0000117.0000142,0000

114.0000146,0000151,000078,000027,0000

35,000045,000040,000046,000039,0000

34,000036,000051,000044,000033,0000

46,000042,0000

5.0000L5.0000L5.0000L5,000015.0000L

5.0000L5.0000L5.0000L5.0000L5.0000L

S.OOOOL5.0000LS.OOOOLS.OOOOLS.OOOOL

S.OOOOLS.OOOOLS.OOOOLS.OOOOLS.OOOOL

S.OOOOLS.OOOOLS.OOOOLS.OOOOLS.OOOOL

S.OOOOLS.OOOOLS.OOOOLS.OOOOLS.OOOOL

S.OOOOLS.OOOOLS.OOOOLS.OOOOLS.OOOOL

S.OOOOLS.OOOOLS.OOOOLS.OOOOLS.OOOOL

S.OOOOLS.OOOOL

80,0000125,000020.0000L170.000020.0000L

20.0000L40,000095,0000125,000020.0000L

95,000045.000020.0000L75.000080,0000

90,0000105,000020.0000L20.0000L20,00001

20.0000L105,000020,0000L

675,000080,0000

110,0000280,0000445,0000235,000060,0000

20,00001215,0000105,0000100,000090,0000

50 , 000020, COM.20.0000L20.0000L80,0000

300,0000100,0000

104

Page 109: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAMPLES (CONTINUED)

SAtflE LATITUDE LONGITUD AA-MN-P

107228107229107230107231107232

10723310723410723510723610723?

107238107239107240107241107242

107243107244107245107246107247

107248107249107250107251107252

107253107254107255107256107257

107258107259107260107261107262

107263107264107265107266107267

107268107269

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818

2424242424

2424242424

2424242424

2424242424

2424242424

2424242424

2424242424

2424242424

2424

06N06N06N06N06N

06N06N06N06N06N

06N06N06N06N06N

06N06N06N06N06N

06N06N06N06N06N

06N06N06N06N06N

06N06N06N06N06N

06N06N06N06N06N

06N06N

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313

16E16E16E16E16E

16E16E16E16E16E

16E16E16E16E16E

16E16E16E16E16E

16E16E16E16E16E

16E16E16E16E16E

16E16E16E16E16E

16E16E16E16E16E

16E16E

535,0000220,0000350,0000288,0000250,0000

470,0000740,0000276,0000425,0000500*0000

625,00001365,0000650*0000650,0000550,0000

248,0000500,0000315,0000400,0000300,0000

450,0000375,0000248,0000283,0000235,0000

283,0000280,0000280,0000340,0000725,0000

910,0000382,0000550,0000750,0000575,0000

650,0000535,0000825,0000712,0000600,0000

500,0000700,0000

105

Page 110: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAMPLES (CONTINUED)

SAHPLE LATITUDE LONGITUD AA-CU-P AA-PB-P AA-ZN-P AA-AG-P AA-CO-P AA-NI-P CH-HO AA-CR-T

107270107271107272107273107274

107275107276107277107278107279

107280107281107282107283107284

107285107286107287107288107289

107290107291107292107293107294

107295107296107297107298107299

107300107301107302107303107304

107305107306107307107308107309

107310107311

18 2418 2418 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 2418 2318 2318 23

18 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

18 2318 23

06N06H06N06N06N

06N06N06N06N06N

06H06N06N06N06N

06N06N13N13N13N

13N13Nm13N13H

13Nm13N13N13N

13N13Nm13N13N

13N13N13N13N13N

13N13N

44 13 16E44 13 16£44 13 16£44 13 16E44 13 16E

44 13 16£44 13 16E44 13 16E44 13 16E44 13 16E

44 13 16E44 13 16E44 13 16E44 13 16E44 13 16E

44 13 16E44 13 16E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E

151.0000113.000076,000037,000065,0000

24,0000169,0000110.000056,000093*0000

169,0000129,000015,000019,000019*0000

22,000023,000021,00009*00005*0000

8,00006,00007,000017,000026,0000

187*000092,000054,000038,000052,0000

76,000058.000096,000093,000078,0000

79,000096,000068.000078.0000

105*0000

91,000093,0000

10,OOOOL11*000019,000023,000030,0000

20,000013,000017.000023.000035.0000

23,000030.000016,000019*000016.0000

19,000030,000018,000012,000014,0000

12.000020*000013.000013,000014*0000

26,000016.000017,000020*000030.0000

30.000022.000022.000024*000056.0000

19,000041*000016.000022*000025,0000

36,000024,0000

28,000042,000068,000080,0000105,0000

50.000028.000041,000050,000087*0000

87.000074.000029,000031.000034,0000

30.000090.000047.000057,000063.0000

50.000070,000058,000054.000043.0000

140,000040,000055.000083,000048.0000

67.000066.000046.000051*000028*0000

30,000062,000021,000024,000028,0000

40,000033,0000

1*40000,90001,10001,20001,5000

1,80001.00001,00001,50001.9000

0,90001,40001*20001*20001*2000

1.20001,40000.60000*60000,5000

0.60000*60000.60000,70000*7000

1.50000*80000,90001,30001,5000

1,40001.10001,30001,40000.9000

1,20000,10000,90000.90001,1000

1.50001,3000

29.000025.000037,000043,000057,0000

33,000026,000026,000038.000050.0000

32,000050.000022,000020,000025,0000

28,000037,000010.000010,OOOOL10,OOOOL

10,OOOOL15,000010.0000L10,0000110.0000

35,000018,000025.000035.000045,0000

50,000038,000046,000036.000040.0000

40.000045.000037,000051,000060.0000

47,000070,0000

24.000023.000027,000055,000036,0000

25.000032,000045,000021,000032,0000

14.000026.000020,000018,000020,0000

23.000011.000023,000011.000010,0000

10.0000L3,000012,000012.000010,0000

37.000021,000022.000022.000012.0000

11,000043,0000

117,000083,0000371,0000

123,000094,0000128,0000122,0000126.0000

133.0000157.0000

5,OOOOL5,000015,000015,OOOOL5.0000L

5.0000L5.0000L5,000015,000015,00001

5,OOOOL5.0000L5,OOOOL5,OOOOL5,OOOOL

5,000015.0000L5,OOOOL5*OOOOL5,OOOOL

5,OOOOL5.0000L5.0000L5.0000L5.0000L

5,OOOOL5,000015.0000L5,OOOOL5.0000L

5.0000L5»OOOOL5,OOOOL5.0000L5.00001

5,OOOOL5,OOOOL5,OOOOL5.0000L5.0000L

5,OOOOL5.0000L

20.0000L80,0000

280,000080,0000

460.0000

150.0000110,0000230,0000170,000020.0000L

35,000050,0000175,0000390.0000560,0000

750,000065,0000165,0000105,000070,0000

190,0000130,000020.0000L155,000095,0000

140.0000145.0000505,0000145,000050,0000

50,0000145.0000160,0000515,0000415,0000

665,000030,0000

970,0000635,0000825,0000

750,0000195,0000

106

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ANALYSIS OF CORE SAMPLES (CONTINUED)

SAMPLE LATITUDE LONGITUD AA-HN-P

107270 107271 107272 107273 107274

107275 107276 107277 107278107279

107280107281107282107283107284

107285107286107287107288107289

107290107291107292107293107294

107295107296107297107298107299

107300107301107302107303107304

107305107306107307107308107309

107310107311

18 18 18 18 18

18 18 18 1818

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818

24 24 24 24 24

24 24 242424

2424242424

2424232323

2323232323

2323232323

2323232323

2323232323

2323

06N 06N 06N 06N 06N

06N 06N 06N 06N06N

06N06H06N06N06N

06H06N13Nm13N

13N13N13N13N13N

13N13N13N13N13N

13N13N13N13N13N

13N13N13N13N13N

13N13N

44 44 44 44 44

44 44 44 4444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

13 13 1313 13

13 13 13 1313

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313

16E 16E 16E 16E 16E

16E 16E 16E 16E16E

16E16E16E16E16E

16E16E34E34E34E

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E34E

34E34E

425,0000 575,0000 650,0000 900,0000 1200,0000

650,0000 427,0000 625,0000 575,00001650,0000

350,0000397,0000475,0000430,0000403,0000

538,0000277,0000225350

,0000,0000

275,0000

247275

,0000,0000

410,0000375350

,0000,0000

687,00003004109001100

900

,0000,0000,0000,0000

,0000750,0000575500287

427262300392500

600500

,0000,0000,0000

,0000,0000,0000,0000,0000

,0000,0000

107

Page 112: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAMPLES (CONTIMUED)

SAMPLE LATITUDE LON6ITUD AA-CU-P AA-PB-P AA-ZN-P AA-AG-P AA-CO-P AA-HI-P CH-HO AA-CR-1

107312107313107314107315107316

107317107318107319107320107321

107322107323107324107325107326

107327107328107329107330107331

107332107333107334107335107336

107337107338107339107340107341

107342107343107344107345107346

107347107348107349107350107351

107352107353

18 2318 2318 2318 2318 23

IS 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

18 23IS 2318 2318 2318 23

18 2318 23

m13N13N13N13N

13N13M13N13N13N

13N13Nm13N13N

13N13N13N13N13N

13Nmm13N13N

13M13N13M13Nm

13Mi3Hmmm

mm13N13N13N

13N13N

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E

81.000083,000035,000015.000021,0000

15.000018,000088,0000120,0000112,0000

105,0000120,0000101,000083,0000105,0000

150,0000140,000055,000075,000052,0000

72,000076,000075.000071.000082,0000

78,000061.5000130.0000102,0000122,0000

79,000093,500095,000090,000093,5000

93,500069,500087,000040,0000100,0000

93,0000103,0000

21,000024,000020,000012,000016,0000

11,000011,000031,000038,000030,0000

38,000030,000041,000032,000032,0000

38,000034,000035,000040,000041,0000

30,000033,000030,000025,000036,0000

27,000026,000020*000017,500020,0000

21,500022,000020,000020,500021,0000

22,500025,000030,000030,000027,5000

23.500025,0000

50.000065,000020,000088,0000108,0000

106,0000123,000064,000072.000068*0000

70,000074,000086,000065,000087,0000

67,000061,000060,000085,000068,0000

86,000092,0000188,000097,000089,0000

77,0000222,000035,000033,000037,0000

71,000076,000077,000074,0000192,0000

113,000074,000088,000070,000086,0000

77,000071,0000

1,00001,30000,40000,30000,8000

0,40000,60000,90001,50001,3000

1,20001,20000,30001,30001,8000

2,00001,80001,50001,50001,6000

0,50001,80001,70000,50001,5000

1,80002,10001,80001,60001,8000

2,00002,20002,20002,40002,2000

2,00002,30002,30002,60002,4000

2,40002,2000

52,000065,000024,000040,000045,0000

69,000064,000061,000038,000062,0000

65,000066,000050,000078,000035,0000

38.000043,000039,000031,000031,0000

30,000026,000032,000029,000034,0000

35,000037,000049,000035,000039,0000

37,000036,000038,000039,000038,0000

42,000038,000040,000040,000042,0000

45,000044,0000

127,0000127,000055,000028,000033,0000

55,000055,000065,000045,000056,0000

70,000064,000056,000088,000076,0000

90,000084,000058,000020,000023,0000

21,000012,000018,000029,000021,0000

18,000021,000084,000029,000046,0000

21,000025,000023,000025,000022,0000

26,000022,000024,000025,000029,0000

27,000026,0000

5.0000L5,OOOOL5.0000L5.0000L5.0000L

5,OOOOL5.0000L5.0000L5,OOOOL5.00001

5,OOOOL5*OOOOL5.0000L5.0000L5.0000L

5.0000L5,OOOOL5,OOOOL5.0000L5.0000L

5.0000L5.0000L5,OOOOL5.0000L5*0000L

5.0000L5,OOOOL5,000015.0000L5.0000L

5,OOOOL5.0000L5,OQOOL5.0000L5.0000L

5.0000L5,OOOOL5.0000L5.0000L5,OOOOL

5,OOOOL5,OOOOL

720*0000600*0000240,000095,0000100,0000

20»OOOOL95,0000100,000095*0000105,0000

105,000020,OOOOL25,000060,0000125,0000

105,0000115,000085,000095,000020,OOOOL

40,000085,000095,0000110*0000100,0000

90,0000120,000095,0000115,000011.0,0000

90,0000105,000095,000090,0000105,0000

140.0000100,0000100,000095,0000105.0000

90,000090,0000

108

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ANALYSIS OF CORE SAMPLES (CONTINUED)

SAMPLE LATITUDE LONGITUD AA-HN-P

107312107313107314107315107316

107317107318107319107320107321

107322107323107324107325107326

107327107328107329107330107331

107332107333107334107335107336

107337107338107339107340107341

107342107343107344107345107346

107347107348107349107350107351

107352107353

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818

2323232323

2323232323

2323232323

2323232323

2323232323

2323232323

2323232323

2323232323

2323

13N13N13N13H13H

13N13N13N13N13N

13H13N13N13N13H

13N13N13N13N13N

13N13K13N13N13N

13*13H13N13N13N

13N13N13N13N13N

13N13N13N13N13N

13N13H

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E34E

34E34E

2150.00002420.0000

21.0000655.0000850.0000

435.00001150.0000151.00001000.0000858.0000

1000.00001050.0000785.0000888.00001450.0000

1150.0000700.0000460.0000950.0000830.0000

1400.00001630.00001400.00001350.0000900.0000

1250.00001000.0000625.0000440.0000550.0000

1090.00001250.00001250.00001300.00001175.0000

1260.00001200.00001500.00001150.00001200.0000

1100.00001100.0000

109

Page 114: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAMPLES (CONTINUED)

SAHPLE LATITUDE LON6ITUD AA-CU-P AA-PB-P AA-ZN-P AA-A6-P AA-CO-P AA-NI-P C«-HO AA-CR-T

107354107355107356107357107358

107359107360107361107362107363

107364107365107366107367107368

107369107370107371107372107373

107374107375107376107377107378

107379107380107381107382107383

107384107385107386107387107388

107389107390107391107392107393

107394107395

18 23IB 2318 2318 2318 23

18 2318 2318 2318 2318 23

IB 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

IB 2318 23

13N13N13N45N45N

45N45N45N45N45N

45N45N45N45N45N

45N45N45N45N45N

45N45N45N45N45N

45N45N45N45N45N

45N45N45N45N45N

45N45N45N45N45N

45N45N

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E

97,000086,0000111,000054,000077,0000

82,0000109,0000125,000017,000022,0000

27,000053,000024,000028,000058,0000

68,000074,000086,000014,0000

120,0000

118,0000116,000068,000094,0000127,0000

105,0000105,0000119,000095.000093,0000

111,000047,000022,000036,000040,0000

58,000047,000029,000035,000051,0000

37,000045,0000

24.500024,000028,000026,500031,0000

27,000029,000025,000023,000038,0000

33,000049,000048,000050,000062,0000

38,000026,000042,0000168,000034,0000

30,000032,000029,000030,000044,0000

35,000046,000048,000050,000043,0000

44,000090,000030,000040,000044,0000

23,000032,000031,000025,000030,0000

30,000021,0000

75.000078,000089,000076,000065,0000

202,000046,000036,000012,000018,0000

97,00001650,000035,000028,000025,0000

37,000053,000055,000064,000090,0000

77,000054,000058,000063.000065,0000

81,000056,000087,000060,000047,0000

64,000072,000089.000077,000067,0000

78,000074,000062,000046,000052,0000

87,000067,0000

2,40002,60002,80002,50003,0000

2,60002,80002,80002,60003,7000

1,20002,70002,80002,90002,7000

3,00000,40002,80003,00003,0000

3,00003,00003,00003,40004,0000

0,40003,40003,80000,50000,8000

1,00000,80000,20000,70001,0000

1,10002,00000,40001,10000,8000

0,70000,8000

48,000045,000050,000047,000050,0000

53,000058,000061,000038,000098,0000

45,000046,000092,0000103,000099,0000

82.000045,000054,000054,000060,0000

75,000057,000074.000061,000056,0000

37,000077.000079,000088,000080,0000

78,000050,000035,000072,000082,0000

77,000086,000035,000057,000053,0000

32,000077,0000

29,000026,000048,000042,0000

201,0000

161,0000153,0000150,000026,000070,0000

32,000017,000075,000088,000078,0000

100,000063,000052,000038,000039,0000

73,000051,000060,000051,000044,0000

45,000067,000076,000077,000070,0000

85,000031,000046,000070,000070,0000

77,000073,000036,000040,000047,0000

44,000078,0000

5.0000L5.0000L5.0000L5.0000L5.0000L

5.0000L5.0000L5.0000L5.0000L5.0000L

5.0000L5.0000L

20,000040,00005.0000L

5.0000L5,000$.5,000(15.0000LS.OOOOL

5.0000L5,OOOOL5«oom5*0000L3,00001

5.000CH.5,0000L5*000315.0000L5.0000L

5.0Q00L5,00001D.OOOOL5.0000120,0000

10,000010,00005.0000L5*0000110,0000

5*000015,0000

90,0000120,0000515,0000600,0000805,0000

400,0000375,0000235,000080,000020.0000L

20,OOOOL20.0000L20.0000L90,000020.0000L

20.0000L120,000020,0000L70*000085,0000

50,000060,000090,000075*000085.0000

110,000080,0000105,000085,000070,0000

50,000070,000020,0000L95.000020.0000L

60.000080.000020,OOOOL45,000060,0000

20,0000L20.0000L

110

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ANALYSIS OF CORE SAMPLES (CONTINUED)

SAHPLE LATITUDE LON6ITUD AA-HN-P

107354107355107356107357107358

107359107360107361107362107363

107364107365107366107367107368

107369107370107371107372107373

107374107375107376107377107378

107379107380107381107382107383

107384107385107386107387107388

107389107390107391107392107393

107394107395

18 23 13N 44 13 34E 1150.000018 23 13N 44 13 34E 1150.000018 23 13H 44 13 34E 1370.000018 23 45N 44 13 34E 450.000018 23 45N 44 13 34E 600.0000

18 23 45N 44 13 34E 350.000018 23 45N 44 13 34E 445.000018 23 45N 44 13 34E 200.000018 23 45H 44 13 34E 80.000018 23 45N 44 13 34E 16.0000

18 23 45N 44 13 34E 162.000018 23 45N 44 13 34E 410.000018 23 45H 44 13 34E 335.000018 23 45N 44 13 34E 470.000018 23 45N 44 13 34E 270.0000

18 23 45N 44 13 34E 365.000013 23 45fi 44 13 34E 550.000018 23 45H 44 13 34E 675.000018 23 45H 44 13 34E 730.000018 23 45N 44 13 34E 630.0000

18 23 45N 44 13 34E 650.000018 23 45N 44 13 34E 625.000018 23 45N 44 13 34E 688.000018 23 45N 44 13 34E 775.000018 23 45H 44 13 34E 750.0000

18 23 45N 44 13 34E 900.000018 23 45N 44 13 34E 710.000018 23 45N 44 13 34E 875.000018 23 45N 44 13 34E 595.000018 23 45N 44 13 34E 452.0000

18 23 45N 44 13 34E 645.000018 23 45N 44 13 34E 500.000018 23 45N 44 13 34E 630.000013 23 45N 44 13 34E 618.000018 23 45N 44 13 34E 673.0000

18 23 45N 44 13 34E 773.000018 23 45N 44 13 34E 775.000018 23 45N 44 13 34E 500.000013 23 45N 44 13 34E 378.000018 23 45N 44 13 34E 565.0000

18 23 45N 44 13 34E 587.000018 23 45N 44 13 34E 424,0000

111

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ANALYSIS Of CORE SAMPLES (CONTINUED)

SAMPLE LATITUDE LON6ITUD AA-CU-P AA-PB-P AA-ZN-P AA-A6-P AA-CO-P AA-NI-P CH-HO l-CR-T

107396107397107398107399107400

107401107402107403107404107405

107406107407107408107409107410

107411107412107413107414107415

107416107417107418107419107420

107421107422107423107424107425

107426107427107428107429107430

107431107432107433107434107435

107436107437

18 2318 2318 23182318 23

18 2318 2318 2318 2318 23

18 2318 2318 2318 2318 23

18 2318 2318 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 2418 2418 241824

18 2418 2418 2418 2418 24

18 2418 24

45N45N45N45N45H

45N45N45N45N45fi

45H45N45N45fi45N

45N45N04H04N04N

04N04N04N04N04N

04N04N04N04N04N

04N04N04N04N04N

04N04N04N04N04N

04N04N

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 34E44 13 34E

44 13 34E44 13 34E44 13 34E44 13 20E44 13 20E

44 13 20E44 13 20E44 13 20E44 13 20E44 13 20E

44 13 20E44 13 20E

32,000039,000024,000063,0000104.0000

60,000060,000060,000062,000086,0000

86,000060,000067,000066,000089,0000

70.000075,0000125.000010.0000

115,0000

100.000093*000095,0000110.0000120.0000

105,000085.000085.000085,0000130,0000

110.0000130,000061,000085.000070.0000

70,000070,000085,000080,000085.0000

90.0000105.0000

33,000044,000039,000030,000030,0000

30,000030,000030,000033,000028,0000

34.000030,000027,000033,000035,0000

20.000033,000015,000015,000015.0000

110,000026.000013.000010,000015,0000

16.000020,000021,000012,000010,0000

15,000020,000028.000018.000016,0000

18,000020,000018,000015,000018.0000

20,000025 0000

62,000068,000041.000060,000072,0000

59.000026,000037,000028,000034,0000

42,000057,000025,000050,0000151,0000

27,000025.000028,000035,000028.0000

36,000055,000043.000049.000040.0000

50.000061,000056,000056.000068.0000

40.000061.000067.000044.000043,0000

42,000060.000054,000044.000056,0000

62.000066,0000

1,10000,80001,10001,50001,3000

1,1000*1,60001.10001,60001,5000

1,40001,40001,60000,80000,7000

1,30001,50001,00000,40000,3000

0.30000,30000,20000,30000,3000

0,20000,20000.40000.30000,1000

0.20000,20000,30000,20000,2000

0,20000,30000,20000,20000.3000

0,20000,3000

96,000091,000048,000062,000062,0000

65,000066,000072,000072,000074,0000

74,000073,000075,000050,000061,0000

72,000069,000063,000047,000051,0000

41,000045,000043,000040,000047,0000

26,000026,000029,000024,000022,0000

28,000029,000030,000028,000027,0000

25,000029,000030,000030,000028,0000

29,000028,0000

80,000073.000036,000034,000034,0000

57,0000107,0000140,0000142,0000129,0000

114,0000126.0000137,0000182.0000155.0000

152,0000100,0000123,0000167,0000161,0000

134.0000104,000092,000088,000085,0000

33.000031.000035.000031,000026.0000

27.000028,000013,000028,000028,0000

27.000030,000030,000032,000031,0000

31,000033,0000

5,00005,00005.0000L5.0000L5.0000L

5.0000L5.0000L5,00005,00005,0000

5,00005,000015,000015.0000L5,OOOOL

5,00005.00005,00005,OOOOL5.0000L

5,00005,000015,OOOOL5.0000L5.0000L

5,OOOOL5.0000L5.00005.0000L5.0000L

5,00005,00005.0000L5,00005.0000L

5.0000L5.0000L5.0000L5.0000L5.0000L

5.0000L5.0000L

65,000020.0000L35,000020.0000L20.0000L

20.0000120.0000L180,0000465.0000785.0000

20.0000L235,0000200,000020*OOOOL

205.0000

395.000065*000020.0000L185,0000505,0000

360,0000360,000055,000050, -000065.0000

20.0000L50,000020.0000L20.0000L20.0000L

20,0000120,OOOOL115,000025,000020.0000L

20,0000120,OOOOL20,0000145*000045,0000

20.04XKH.40,0000

112

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ANALYSIS OF CORE SAMPLES (CONTIMUED)

SAtfLE LATITUDE LONGITUB AA-HN-P

107396107397107398107399107400

107401107402107403107404107405

107406107407107408107409107410

107411107412107413107414107415

107416107417107418107419107420

107421107422107423107424107425

107426107427107428107429107430

107431107432107433107434107435

1074J6107437

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818131818

1818181818

1818

2323232323

2323232323

2323232323

2323242424

2424242424

2424242424

2424242424

2424242424

2424

45N45N45N45N45N

45N45N45N45N45N

45N45N45H45N45N

45N45N04N04N04N

04H04N04N04N04H

04N04H04N04N04N

04N04N04N04N04N

04N04N04H04H04N

04H04H

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E34E

34E34E34E34E34£

34E34E34E34E34E

34E34E34E34E34E

34E34E34E20E20E

20E20E20E20E20E

20E20E

454 .0000550.0000162 .0000

1060.0000775 ,0000

600.0000285.0000290.0000310 .0000340.0000

387231180378385

213273245445350

365249435530665

6007451030815570

550880825

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000595.0000555

700655575685

.0000

.0000

.0000

.0000

.0000690.0000

680 .0000850.0000

113

Page 118: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAMPLES (CONTINUED)

SAMPLE LATITUDE LONGITUD AA-CU-P AA-PB-P AA-ZN-P AA-A6-P AA-CO-P AA-NI-P CH-HO AA-CR-T

107438107439107440107441107442

107443107444107445107446107447

107448107449107450107451107452

107453107454107455107456107457

107458107459107460107461107462

107463107464107465107466107467

107468107469107470107471107472

107473107474107475107476107477

107478107479

18 2418 2418 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 2418 2418 241824

18 2418 2418 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 2418 2418 2418 24

18 2418 24

04N04N04N04N04N

04N04N04N04N04N

04N04N04H04N04N

04N04N04N04N04N

04N04N04N04N04N

04N04N04N04N04N

04N04N04N04N04N

04N04N04N04N04N

04N04N

44 13 20E44 13 20E44 13 20E44 1320E44 13 20E

44 13 20E44 13 20E44 13 20E44 13 20E44 13 20E

44 13 20E44 13 20E44 13 20E44 13 20E44 13 20E

44 13 20E44 13 20E44 13 20E44 13 20E44 13 20E

44 13 20E44 13 20E44 13 20E44 13 20E44 13 20E

44 13 20£44 13 20E44 13 20E44 13 20E44 13 20E

44 13 20E44 13 20E44 1320E44 13 20E44 13 20E

44 13 20E44 13 20E44 13 20E44 13 20E44 13 20E

44 13 20E44 13 20E

75.0000115.0000100,0000115,000087.0000

105,000084,000095.0000110,0000130,0000

70,000035.000055,000039,000035.0000

42,000045.000050,000045,000010.0000

35,000035.000035,000040,000032,0000

25.000045,000045,000040,000055.0000

90,000095.000045,000030.000026,0000

35,000052,000035,000045,000040,0000

41.000050.0000

15,000016.000015.000016,000029,0000

70,000066,000071.000073.000020.0000

20,000030.000030.000046,000035,0000

46.000030,000030,000020,000025.0000

30,000028,000032,000032.000025,0000

30.000035,000035,000028,000035,0000

25,000023,000015.000018,000029.0000

23,000032,000018.000020,000020.0000

25,000018.0000

52.000041.000041,000043,000071,0000

49,000058,000076,000073,000041.0000

66.000055.000090.000065,000046.0000

70.000090.000090.0000117,000090,0000

95.000044.000077,000045,000084,0000

150.000037.000035.000060.000069.0000

50,0000850,000082,0000103.0000108.0000

108,0000146,0000115.0000103.000085,0000

95,000065,0000

0.30000,20000,10000,10001,4000

0,30000.10000.40000,30000,2000

0,30000.40000,60001,10000,8000

1,40000.40000,60000,80000,4000

0,40000,30000.50000,20001.4000

1.40000,60000.60000,90001.0000

0,60001.20000,60000.30001,4000

0.50001.40000,30000,70000.6000

1,00000.4000

25.000023.000020,000020.000025,0000

25,000026,000027,000027,000029,0000

26,000033.000036.000035,000030,0000

37,000029,000030,000041,000036,0000

29,000038,000029,000035.000037,0000

35,000038,000045,000046,000039,0000

29,000030,000029,000030,000030,0000

33,000035,000032,000035,000031,0000

30,000029,0000

30,000030.000031.000029.000010,0000

30.000029.000030,000030.000030.0000

30.000078,000080,000056.000078.0000

61.000070,000071.000062,000029,0000

46,000097,000059.000083.000025.0000

10.000076,000086.0000140,000098,0000

50,000010,000050,000028,00009,0000

30,000016.000030.000035,000031,0000

20.000035.0000

5.0000L5.0000L5.0000L5.0000L5.0000L

5.0000L5.0000L5.0000L5.0000L5.0000L

5.0000L5.00005.0000L5.0000L5.0000

5.0000L5,00005.00005.00005,0000

5,000010,000020.000010.00005.0000L

5.0000L10.000010,00005,00005,0000

5,00005.0000L5.0000L5.0000L5.0000L

5.0000L5.0000L5.0000L5.0000L5.0000L

5.0000L5,OOOOL

45,000020.0000L65*000070.000055.0000

45.000020*00001120*000040,000035,0000

40,000090.000030,000020.0000L45,0000

20.0000L80.000075,000050,000045,0000

130,0000150,000080,0000125.000020.0000L

20.0000L95.000035,0000

420.0000420,0000

175,000090,0000135,000095,000020.0000L

160,000065.0000110,000060.000090,0000

20.0000L145,0000

114

Page 119: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAMPLES (CONTINUED)

SAHPLE LATITUDE LONGITUD AA-WhP

107438 107439 107440 107441107442

107443107444107445107446107447

107448107449107450107451107452

107453107454107455107456107457

107458107459107460107461107462

107463107464107465107466107467

107468107469107470107471107472

107473107474107475107476107477

107478107479

18 18 18 1818

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818

24 24 24 2424

2424242424

2424242424

2424242424

2424242424

2424242424

2424242424

2424242424

2424

04N 04N 04N 04H04N

04N04H04N04N04N

04H04N04N04N04N

04N04N04N04N04N

04N04N04N04N04N

04N04N04N04N04N

04N04N04M04N04N

04N04N04N04N04N

04N04N

44 4444 4444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

13 13 13 1313

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313

20E 20E 20E 20E20E

20E20E20E20E20E

20E20E20E20E20E

20E20 20 20E20E

20E20E20E20E20E

20E20E20E20 20E

20E20E20E20E20E

20E20E20E20E20E

20 20£

650.0000 425.0000 450.0000 1180.0000805.0000

675.0000770.00001080.00001040.0000810.0000

930.0000380.0000765.0000354.0000250,0000

369.0000400.0000365.0000940.00001000.0000

790.0000230.0000645.0000295.00001050.0000

1225.0000185.0000285.00001100.00001200.0000

900.0000785.0000785.0000855.00001000.0000

970.00001180.00001140.00001220.0000990.0000

725.0000600.0000

115

Page 120: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAHPLES (CONTINUED)

SAMPLE LATITUDE LON6ITUD AA-CU-P AA-PB-P AA-ZN-P AA-AG-P AA-CO-P AA-NI-P CH-HO AA-CR-T

107480107481107482107483107484

107485107486107487107488107489 *

107490107491107492107493107494

107495107496107497107498107499

107600107601107602107603107604

107605107606107607107608107609

107610107611107612107613107614

107615107616107617107618107619

107620107621

18 24 04N18 24 04N18 24 04N18 20 35N18 20 35N

18 20 35N18 20 35N18 20 35N1820 35N18 20 35N

18 20 35N18 20 35N18 20 35N18 20 35N18 20 35N

18 20 35N18 20 35N18 20 35N18 20 35N18 20 35N

18 20 35N18 20 35N18 20 35N18 20 35N18 20 35N

18 20 35N18 20 35N18 20 35N18 20 35N18 20 35N

18 20 35N18 20 35N13 20 35N18 20 35N18 20 35N

18 20 35N18 20 35N18 20 35N18 20 35N18 20 35N

18 20 35N18 20 35N

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

13 20E13 20E13 20E1243E1243E

12 43E1243E12 43E12 43E12 43E

12 43E12 43E12 43E12 43E12 43E

12 43E12 43E12 43E12 43E12 43E

12 43E12 43E12 43E12 43E12 43E

12 43E12 43E12 43E12 43E12 43E

12 43E12 43E12 43E12 43E12 43E

12 43E12 43E12 43E12 43E12 43E

12 43E12 43E

55,000045,000045,000095,000040,0000

38,000025,000018.000020,000015,0000

15,000025,000020,000015,000015,0000

15,000015,000020,000035,000055,0000

25,000020,000019,0000100,000087,0000

95,000035,0000140,0000140,0000140,0000

145,000085,0000

100,000090,000095,0000

84,000086,000092,0000106,000065,0000

82,000098,0000

18,000020,000020,000020,000018,0000

30,000025,000030,000028,000028,0000

25,000028,000030,000028,000035,0000

35,000033,000030,000026,000020,0000

38,000033,000038,000020,000020,0000

23,000018,000020,000023,000016,0000

20,000026,000020,000015,000015,0000

17,500018,000020,000019,000017,0000

16,000020,0000

54,000095,000080,000033,000018,0000

45,000037,000030,000033,000031,0000

34,000024,000033,000029,000029,0000

34,000026,000030,000048,000047,0000

54,000028,000026,000041,000067,0000

39,000047,000053,000045,000045,0000

30,000052,000034,000040,000035,0000

35,000037,000040,000025,000033,0000

23,000034,0000

0,30000,40000,40000,60000,3000

2,20000,60001,20000,90001,0000

0,10001,40000,30000,40002,0000

2,40000,80000,10000,40001,1000

0,70001,30002,10000,60001,4000

0,60000,70000,80000,50000,8000

0,90001,60000,80000,60000,4000

0,50000,70000,80000,70000,4000

0,50000,5000

32,000029,000030,000043,000045,0000

44,000033,000040,000031,000027,0000

29,000032,000033,000030,000037,0000

40,000030,000018,000021,000021,0000

19,000047,000035,000018,000040,0000

32,000048,000027,000039,000031,0000

35,000055,000034,000033,000044,0000

35,000032,000038,000051,000038,0000

43,000040,0000

38,000033,000048,000054,000097,0000

25,000063,000015,000068,000055,0000

52,000063,000060,000055,000023,0000

23.000056,000067,000081,000075,0000

75,000066,000044,0000160,0000119,0000

145,0000185,0000150,0000140,0000106,0000

130,0000109,0000115,0000120,0000140,0000

125,0000120,0000115,0000135,0000113,0000

120,0000116,0000

5.0000L5.0000L5,OOOOL5.0000L5.0000L

5,OOOOL5,OOOOL5,OOOOL5,OOOOL5,OOOOL

5,OOOOL5,OOOOL5,OOOOL5,OOOOL5,OOOOL

5.0000L5.0000L5.0000L5.0000L5.0000L

5.0000L5,OOOOL5,OOOOLS.OOOOL5,OOOOL

5.0000L5.0000L5,OOOOL5.0000L5,OOOOL

5,OOOOL5 ,000015,OOOOL5,OOOOL5,0000

5,OOOOL5,OOOOL5.0000L5,OOOOL5,OOOOL

5,OOOOL5.0000L

80,0000130,0000165,0000130,000070,0000

20,OOOOL135,000020,OOOOL30,000030,0000

495,000020,OOOOL20.0000L20,OOOOL20,OOOOL

20,OOOOL20,OOOOL20,OOOOL

235,0000215,0000

20.0000L20.0000L20,OOOOL620,0000415,0000

900,0000495,0000390,000020,OOOOL

600,0000

835,000020,OOOOL

415,0000390,0000295,0000

565,0000440,0000385,0000385,0000485,0000

20,00001205,0000

116

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ANALYSIS OF CORE SAMPLES (CONTINUED)

SAMPLE LATITUDE LON6ITUD AA-HN-P

107480107481107482107483107484

107485107486107487107488107489

107490107491107492107493107494

107495107496107497107498107499

107600107601107602107603107604

107605107606107607107608107609

107610107611107612107613107614

107615107616107617107618107619

107620107621

1818131818

1818131818

1818181818

1818181818

1818131818

1818181818

1818181818

1818181818

1813

2424242020

2020202020

2020202020

2020202020

2020202020

2020202020

2020202020

2020202020

2020

04N04N04N35N35N

35N35N35N35N35N

35N35N35N35N35N

35N35N35N35N35N

35N35H35N35N35N

35N35N35N35N35H

35N35N35N35M35N

35N35N35H35M35N

35N35N

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

1313131212

1212121212

1212121212

1212121212

1212121212

1212121212

1212121212

1212121212

1212

20E20E20E43E43E

43E43E43E43E43E

43E43E43E43E43E

43E43E43E43E43E

43E43E43E43E43E

43E43E43E43E43E

43E43E43E43E43E

43£43E43E43E43E

43E43E

570.0000670.0000600.000085.000015.0000

270.0000235.0000126.0000180.000090.0000

60.000085.0000130.0000100*000070.0000

105.000025.000080.0000155.0000110.0000

250.0000325.0000435.0000410.0000740.0000

420,0000320.0000460.0000475.0000660.0000

300.0000580.0000285.0000300.0000232.0000

236.0000339.0000307.0000251.0000275.0000

276.0000314.0000

117

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ANALYSIS OF CORE SAMPLES (CONTINUED)

SAMPLE LATITUDE LONGITUD AA-CU-P AA-PB-P AA-ZN-P AA-A6-P AA-CO-P AA-NI-P CM-MO AA-CR-T

107622107623107624107625107626

107627107628107629107630107631

10763210?633107634107635107636

107637107638107639107640107641

107642107643107644107645107646

107647107648107649107650107651

107652107653107654107655107656

107657107658107659107660107661

107662107663

18 2018 2018 2018 2018 21

18 2118 2118 2118 2118 21

18 2118 2118 2118 2118 21

18 2118 2118 2118 2118 21

18 2118 2118 2118 2118 21

18 2118 2118 2118 2118 21

18 2118 2118 2118 2118 21

18 2118 2118 2118 2118 21

18 2118 21

35N35N35N35N20N

20N20N20N20N20N

20N20N20N20N20N

20N20N20N20N20N

20N20N20N20N20N

20N20N20N20N20N

20N20N20N20N20N

20N20N20N20N20N

20N20N

44 12 43E44 12 43E44 12 43E44 12 43E44 13 03E

44 13 03E44 13 03E44 13 03E44 13 03E44 13 03E

44 13 03E44 13 03E44 13 03E44 13 03E44 13 03E

44 13 03E44 13 03E44 13 03E44 13 03E44 13 03E

44 13 03E44 13 03E44 13 03E44 13 03E44 13 03E

44 13 03E44 13 03E44 13 03E44 13 03E44 13 03E

44 13 03E44 13 03E44 13 03E44 13 03E44 13 03E

44 13 03E44 13 03E44 13 03E44 13 03E44 13 03E

44 13 03E44 13 03E

95,000087,500080,000095,000064,0000

18,000012,500011,000015,000026,5000

34,000019,000045,000039,000022,5000

16,000052,500018,000018,000024,0000

22,000016,500031,500016,500016,5000

15,500016,000020,000025.000018.5000

14,000044,000021,500020,000034,0000

45,000050,000047,500027,500033,0000

25,000019*0000

21,000022,000030,000030,000026.0000

31,000046,000030,000029,000027,0000

30,000030.000026,500026,500031,0000

42,000040,000035,000030.000025,0000

30,000030,000030,000030,000027,5000

32,500035,000030,000030,000035,0000

40,000045,000027,500030,000030,0000

25,000030,000025,000035,000043,0000

20,000027,5000

40,000033.000035.000028.000034,0000

28,000021,000025,000023,000046,0000

35,000044,000067,000050,000034,0000

35,000055,000054,000027,000051,0000

35,000033,000054.000085,000070,0000

40,000035,000048,000038.000034,0000

27,000038,000065,000039,000043,0000

59,000062,000048,000039,000049,0000

55,000035,0000

0.60000.50000,30000,10002,7000

2,7000O.OOOON0,30000,10000,1000

0,10000,30000,60000,30000,5000

0,20000,20000,20000,20000,2000

0,10000,40000,30000,10000,1000

0,10000,20000,10000,10000,3000

0,90000,20000,20000,10000,2000

0,40000.20000,10000.10000.1000

0,10000,1000

48,000037,000039,000055,000090,0000

44,000017,000019,000017,000021,0000

22,000021,000022,000026,000021 ,0000

20,000020,000022,000018.000021,0000

19,000022,000020,000021,000021,0000

12,000023,000023,000019,000021,0000

19,000020,000022,000022,000022,0000

24,000023,000021,000022,000023,0000

23,000022,0000

150,0000115,0000131,0000155.0000210,0000

34,000073,000072,000077,000079.0000

86,000083.000071,000088,000083.0000

81,000080,000086.000088,000084,0000

88.000033,000099,000082,000079,0000

78,000083,000081,000083,000085,0000

78,000083,000075,000084,000078,0000

76,000080,000069,000073,000079,0000

65,000074,0000

5.0000L5.0000L5,00005,00005.0000L

5.0000L5,00005,00005,00005,0000

5,00005.00005.0000L5,00005,0000

5,000020,00005.0000L5,00005.0000L

5,00005.00005,00005.00005.0000

5,00005,00005.0000L5,00005,0000

5,00005,00005,00005,00005.0000L

5,00005,00005,00005.0000L5,0000

5.0000L5.0000L

475,0000475,0000320,0000360,000020.0000L

20,OOOOL20,OOOOL20.0000L20.0000L20,OOOOL

20.0000L20.0000L20.0000L20.0000L20.0000L

20.0000L20.0000L20.0000L20.0000L20.0000L

20.0000L20.0000L20,OOOOL20.0000L20.0000L

20.0000L20.0000L20.0000L20,OOOOL20.0000L

20.0000L20.0000L20.0000L20.0000L20.0000L

20.0000L20.0000L20.0000L20.0000L20.0000L

20.0000L20.0000L

US

Page 123: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAMPLES (CONTINUED)

SAHPLE LATITUDE LONGITUB AA-HN-P

107622107623107624107625107626

107627107628107629107630107631

107632107633107634107635107636

107637107638107639107640107641

107642107643107644107645107646

107647107648107649107650107651

107652107653107654107655107656

107657107658107659107660107661

107662107663

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818

2020202021

2121212121

2121212121

2121212121

2121212121

2121212121

2121212121

2121212121

2121

35N35N35N35N20N

20H20N20N20N20N

20N20N20H20N20N

20N20N20N20N20N

20N20N20N20N20N

20N20N20N20N20N

20N20N20N20N20N

20N20N20N20N20N

20N20N

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

1212121213

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313

43E43E43E43E03E

03E03E03E03E03E

03E03E03E03E03E

03E03E03E03E03E

03E03E03E03E03E

03E03E03E03E03E

03E03E03E03E03E

03E03E03E03E03E

03E03E

202.0000265*0000185,0000190.0000165,0000

22,000016*000027,000056,0000

217,0000

388,0000398,0000850,0000315,0000394,0000

173,0000316,0000327,0000332,0000430,0000

404,0000486,0000565,0000250,0000400,0000

210,0000159,0000271,0000355,0000245,0000

279,0000289,0000425,0000330,0000260,0000

683,0000865,0000765,0000371,0000452,0000

478,0000325,0000

119

Page 124: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAMPLES (CONTINUED)

SAHPLE LATITUDE LQNGITUD AA-CU-P AA-PB-P AA-ZN-P AA-AG-P AA-CO-P AA-NI-P CM-MO AA-CR-T

107664107665107666107667107668

107669107670107671107672107673

107674107675107676107677107678

107679107680107681107682107683

107684107685107686107687107688

107689107690107691107692107693

107694107695107696107697107698

107699107700107701107702107703

107704107705

182118 21182118 2118 21

182118 211821182118 21

18 2118 2118 2118 2118 21

18 2118 2118 2118 2118 21

18 2118 2118 2118 2118 21

18 2118 2118 2118 2118 21

18 2118 2118 2118 2118 21

18 2118 2118 2118 2118 21

18 2118 21

20N20N20N20N20N

20N20N20N20N20N

20N20N20N20N20N

20N20N20N20N20N

20N20N20N20N20N

20N20H20N20N20N

20N20N20N20N20N

20N20N20N20N20N

20N20N

44 13 03E44 1303E44 1303E44 13 03E44 1303E

44 13 03E44 13 03E44 13 03E44 13 03E44 13 03E

44 13 03E44 13 03E44 13 03E44 13 03E44 13 03E

44 13 03E44 13 03E44 13 03E44 13 03E44 13 03E

44 13 03E44 13 03E44 13 03E44 13 03E44 13 03E

44 13 03E44 13 03E44 13 03E44 13 03E44 13 03E

44 13 03E44 13 03E44 13 03E44 13 03E44 13 03E

44 13 03E44 13 03E44 13 03E44 13 03E44 13 03E

44 13 03E44 13 03E

17,500016,000038,000039,000025,0000

56,000052,500020,000030,000033,5000

26,000021,000034,000034,000048,0000

70,500070,500055,000045,000031,5000

35,000060,500063,000061,000050,0000

59,000037,500046,500061,500037,0000

59,000040,000080,000083,000040,0000

31,500031.000067,000053,500069,5000

17,500048,0000

25,000027,000024,000025,000030,0000

37,000035,000030,000025,000030,0000

35,000040,000030,000025,000020,0000

15,000015,000020,000020,000017,5000

20,000020,000020,000017,500020,0000

20,000020,000020,000020,000025,0000

25,000020,000025,000020,000015,0000

25,000025,000025,000020,000025,0000

15,000020,0000

29,000037,000058,000059,000053,0000

61,000040,000045,000084,000047,0000

34,000040,000042,000047,000056,0000

85,000085,000064,000077,000053,0000

56,000068,000079,000081,000061,0000

79,000063,000065,000083,000066,0000

65,000049,000061,0000

520,000061,0000

56,000054,000055,0000430,000058,0000

92,000076,0000

0,10000,10000,20000,20000,2000

0,10000,20000,10000,20000,1000

0,20000,60000,60000,50000,6000

0,50000,60000,50000,70000,6000

0,50000,70000,90000,60000,7000

0,60000,60000,90000,10001,1000

0,90000,80000,80001,00000,9000

1,10001,30001,00001,30001,4000

1,10001,3000

24,000024,000022,000023,000023,0000

22,000024,000024,000023,000024.0000

26,000024,000025,000026,000025,0000

25,000017,000023,000023,000024,0000

24,000030,000027,000026,000026,0000

24,000023,000027,000026,000026,0000

30,000025,000032,000023,000025,0000

29,000035.000037,000023,000021,0000

40,000023,0000

75,000073,000067,000074,000079,0000

73,000077,000073,000065,000076,0000

83,000079,000085,000083,000070,0000

64,000042,000066,000074,000067,0000

65,000063,000073,000060,000067,0000

71,000063,000065,000045,000077,0000

75,000092,000094,000080,0000124,0000

139,000091,0000132,000055,000036,0000

29,000041,0000

5,00005.0000L5,00005,00005.0000L

5.0000L5.0000L5.0000L5.0000L5,OOOOL

5.0000L5.0000L5.0000L5.0000L5.0000L

5.0000L5.0000L5.0000L5.0000L5.0000L

5.0000L5.0000L5.0000L5.0000L5.0000L

5.0000L5,000015.0000L5,00005,0000

5,00005.0000L5.0000L5,00005,00001

5,OOOOL5,00005,00005,00005.0000L

5,000015.0000L

20,000020.0000L20,0000120,OOOOL65,0000

20.0000L20,0000120,0000120,OOOOL20,00001

20.0000L20.0000L20,OOOOL20.0000L20,00001

155,0000125,0000100,0000100,000060,0000

90.000065,000020,OOOOL20.0000L20.0000L

60,000055,000095,000075,000020.0000L

50,0000105,000020.0000L75,000040,0000

20,OOOOL20.0000L20,0000155,000065,0000

20.0000L50,0000

120

Page 125: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAHPLES (CONTINUED)

SAMPLE LATITUDE LONGITUD AA-HN-P

107664107665107666107667107668

107669107670107671107672107673

107674107675107676107677107678

107679107680107681107682107683

107684107685107686107687107688

107689107690107691107692107693

107694107695107696107697107698

107699107700107701107702107703

107704107705

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818

2121212121

2121212121

2121212121

2121212121

2121212121

2121212121

2121212121

2121212121

2121

20N20ti20N20N20N

20N20N20N20H20N

20N20N20H20N20N

20NW20N20N20N

20N20N20N20N20N

20N20N20N20N20N

20N20N20N20H20N

20N20N20N20N20N

20N20N

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313131313

1313

03E03E03E03E03E

03E03E03E03E03E

03E03E03E03E03E

03E03E03E03E03E

03E03E03E03E03E

03E03E03E03E03E

03E03E03E03E03E

03E03E03E03E03E

03E03E

213.0000310.0000640*0000568.0000465.0000

590.0000375.0000285.0000470.0000330.0000

462.0000292.0000500.0000402.0000588.0000

813.0000835.0000690.0000610.0000500.0000

451.0000675,0000715.0000740.0000635.0000

720.0000525.0000590.0000670.0000625.0000

568.0000608.0000725.0000788.0000388.0000

188.0000317.0000388.00001135.0000650.0000

390.0000563.0000

121

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ANALYSIS OF CORE SAMPLES (COHTMO)

SAHPLE LATITUDE LONGITUD AA-CU-P AA-PB-P AA-ZN-P AA-AG-P AA-CO-P AA-NI-P CK-HO AA-CR-T

107706107707107708107709107710

107711107712107713107714107715

107716107717107718107719107720

107721107722107723107724107725

107726107727107728107729107730

107731107732107733107734107735

107736107737107738107739107740

107741107742107743107744107745

107746107747

18 2118 2118 2118 2118 21

18 2118 2018 2018 2018 20

18 2018 2018 2018 2018 20

18 2018 2018 2018 2018 20

18 2018 2018 2018 2018 20

18 2018 2018 2018 2018 20

18 2018 2018 2018 2018 20

18 2018 2018 2018 2018 20

18 2018 20

20N20N20N20N20N

20N21N21N21N21N

21N21N21N21N21N

21N21N21N21N21N

21N21N21N21N21N

21N21N21N21N21N

21N21N21N21N21N

21N21N21N21N21N

21N21N

44 13 03E44 13 03E44 13 03E44 13 03E44 13 03E

44 13 03E44 12 18E44 12 18E44 12 18E44 12 18E

44 12 18E44 12 18E44 12 18E44 12 18E44 12 18E

44 12 I8E44 12 18E44 12 18E44 12 18E44 12 18E

44 12 18E44 12 18E44 12 18E44 12 18E44 12 18E

44 12 18E44 12 18E44 12 18E44 12 18E44 12 18E

44 12 18E44 12 18E44 12 18E44 12 18E44 12 18E

44 12 18E44 12 18E44 12 18E44 12 18E44 12 18E

44 12 18E44 12 18E

68,000061.000043.000055.000055.5000

50,500020,000025,000015,000028,0000

14,000022,000019,000036,000071,0000

81,000039,000037,000049,000044,0000

24,000023,000027,000019,000015,0000

22,000023,000037,000042,000045.0000

42.000051,000055.000058,000049,0000

35,000040,000018,000047.000070,0000

57,000060,0000

20.000015.000020,000020,000020,0000

25.000012.000010.0000L16,000018,0000

13,000014.000025.000017,000017.0000

22,000021,000027,000031.000029,0000

18.000019,000020,000018,000020,0000

25,000025.000025,000028,000032,0000

27,000030,000030,000035.000025.0000

25,000027,000020,000020,000016,0000

15,000015,00*?

47.000045,000044.000053.0000150.0000

51,000016,000010,000053.000050,0000

79,000060,000068,000063,000058.0000

48.000066,000038,000062.000055,0000

53.000034,000047,000046,000045.0000

62,000065,000060,000035,000074,0000

41.000046,000057,000044,000046,0000

39,000061,000062,000042,000052.0000

45,000041,0000

1,50001,10001,40001,30001.3000

1.60000,80000,60000,90000,5000

0,50000.50000.70000,50000,5000

0,80000,50000,50000,40000,3000

2,10000,40000,30000,40000,5000

0.50000.60000.60001.30000,4000

0,20000.30000,20000,30000.2000

0.20000,30000,30000,40000,7000

0,60000,4000

21.000022,000024,000025.000022.0000

28,000015,000021,000025,000025,0000

14.000025.000025,000035,000040.0000

40.000035.000055,000070.000065,0000

40.000040,000040,000035,000035,0000

60,000038.000053.000060,000068,0000

59.000060,000065.000075.000063,0000

75,000045,000030,000035,000035,0000

28,000035,0000

54.000070,000064,000074.000070,0000

141,000018,000015,000017*000021,0000

15,000017.000022.0000101,0000139.0000

89,000031,000055,000049,000049,0000

26.000024,000024,000018,000020,0000

27,000025,000032,000037,000048,0000

44,000050,000046.000059,000036.0000

33,000036,000019,000077,0000100,0000

90,000075,0000

5.0000L5,000015.000015,000015.0000L

5.0000L5,00005,00005,00005,0000

5,00005.00005.00005,00005,0000

5,00005,00005,000010,000010,0000

5,00005,00005,00005.00005,0000

5.00005,00005,00005.00005.0000

5.00005,00005,00005,00005,0000

5,00005.00005,00005.00005.0000

5,00005,0000

95,000070,000070.000095,000v95,0000

60,0000123,0000150,0000135,0000310.0000

330.000080.000080,0000215,0000310,0000

115,000030,000015,000015,000015,0000

85,000020,000070.0000100,000020,0000

105,0000130,000020,000020,000015.0000

15,000015,0000155,000015,000020,0000

15*000020,0000

220,0000305,0000270,0000

350,0000190.0000

122

Page 127: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAMPLES (CONTINUED)

SAMPLE LATITUDE LOHGITUD AA-HN-P

107706107707107708107709107710

107711107712107713107714107715

107716107717107718107719107720

107721107722107723107724107725

107726107727107728107729107730

1077311077^2107733107734107735

107736107737107738107739107740

107741107742107743107744107745

107746107747

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818

2121212121

2120202020

2020202020

2020202020

2020202020

2020202020

2020202020

2020202020

2020

20N20N20N20N20N

20N21H21N21N21N

21N21N21N21N21N

21N21H21N21N21N

21N21N21N21N21N

21N21M21N21*21H

21N21N21N21N21N

21N21H21N21N21N

21N21N

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

1313131313

1312121212

1212121212

1212121212

1212121212

1212121212

1212121212

1212121212

1212

03E03E03E03E03E

03E18E18E18E18E

18E18E18E18E18E

18E18E18E18E18E

18E18E18E18E18E

18E18E18E18E18E

18E18E18E18E18E

18E18E18E18E18E

18E18E

683.0000508.0000675.0000685.0000640.0000

720.000069.0000281010

.0000,00001.OOOOL

435,0000570640550

.0000

.0000

.0000520,0000

320645590425305

420410635515450

5805901135585655

900425480330445

460655800550600

545420

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

123

Page 128: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAMPLES (CONTINUED)

SAhPLE LATITUDE LONGITUD AA-CU-P AA-PB-P AA-ZN-P AA-AG-P AA-CO-P AA-NI-P CM-HO AA-CR-T

107748107749107750107751107752

107753107754107755107756107757

107758107759107760107761107762

107763107764107765107766107767

107768107769107770107771107772

107773107774107775107776107777

107778107779107730107781107782

107783107784107785107786107787

107788107789

18 20 21N18 20 21N18 20 21N18 20 21N18 20 21N

18 20 21N18 20 21N18 20 21N18 20 21NIB 20 21N

18 20 21N18 20 21N18 20 21N18 20 21N18 20 21N

18 20 21N18 20 21N18 20 21N18 20 21M18 20 21N

18 20 21N18 20 21N18 20 21N18 20 21N18 20 21N

18 20 21N18 20 21N18 20 21N18 20 21N18 20 21N

18 20 21N18 20 21N18 20 21N18 20 21N18 20 21N

18 20 21N18 20 21N18 20 21N18 20 21N18 20 21N

18 21 16N18 21 16N

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

12 18E12 18E12 18E12 18E12 18E

12 18E12 18E12 18E12 18E12 18E

12 18E12 18E12 18E12 18E12 18E

12 18E12 18E12 18E12 18E12 18E

12 18E12 18E12 18E12 18E12 18E

12 18E12 18E12 18E12 18E12 18E

12 18E12 18E12 18E12 18E12 18E

12 18E12 18E12 18E12 18E12 18E

11 35E11 35E

73,000078,000045,000019,000027,0000

60,000080,000036,000034,000022,0000

18,000078,000069,000097,000048,0000

39,000068,000031.0000118,000079,0000

73,0000103,000085,000041,000036,0000

90,000054,0000134,000057,000066,0000

75,000038,000035,000091,000032,0000

46,000080,000050,000066,000035.0000

38,000036,0000

10,000015,000017,000017,000014,0000

22,000020,000018.000022.000024,0000

22,000019,000020.000022,000020,0000

19.000014,000019,000016,000017,0000

18,000020,000019.000019,000017,0000

20,000020,000020.000020,000015,0000

18,000017,000017,000024,000017,0000

15,000020,000019,000014,000014,0000

O.COOQNO.OOOON

34,000076,000065,000037,000032.0000

41.000038,000046,000055,0000139,0000

93,000068,000044,000052,000066.0000

52,000040,000075,000042,000037,0000

44,000049,000054.000078,000063.0000

47,000065,000051,000051,000051,0000

47,000045,000034,000055,000052,0000

51,000049,000041,000041,000041,0000

80,000037,0000

0,40000,60000.40000,60000,4000

0,90000,60000.80000,20000,7000

0,90000,40000,50000,60000,4000

0,40000,40000.90000,50000.5000

0.50000.70000,80000,40000,5000

0,50000,60000,40000,90000,4000

0,30000,40000,30000,30000,3000

0,40000,30000,50000.50000,6000

O.OOOONO.OOOON

38,000038,000040,000025,000030.0000

33,000030,000033,000045,000053,0000

35,000068,000060,000034,000035,0000

25,000028,000024,000025,000025,0000

25,000023,000023,000020,000018,0000

35,000028.000060,000028,000023,0000

30,000023*000035,000065,000020,0000

25,000038,000038,000020,000020,0000

25,000025,0000

92.000050,000047,000029,000033.0000

72,0000124.000065.000016,000021,0000

36.000048,000037,000054,000070,0000

186.000060,000031,0000188,0000193.0000

190,0000173.0000100,000034,000049,0000

122,0000133,0000118.0000180,000093.0000

95,000056,000031,000056,0000104,0000

124,0000105,000086,000074,000048,0000

360,0000320,0000

5.00005,00005,00005,00005,0000

5,00005,00005,00005,00005,0000

5,00005,00005,00005,00005, WOOL

5,OOOOL5,OOOOL5,OOOOL5,OOOOL5.0000L

5,OOOOL5,OOOOL5.0000L5,OOOOL5,OOOOL

5,OOOOL5.0000L5,000015.0000L5,00001

5,OOOOL5,000015,OOOOL5.0000L5,OOOOL

5,OOOOL5.0000L5,000015,OOOOLS,OOOOL

5.0000L5,00001

200,000085,000085,0000

200.0000115,0000

210,0000240.0000250,000045,000020.0000L

130,000070,000020.0000L85,000095.0000

60,0000150,0000140,0000470,0000900,0000

545,0000460,0000230,0000115,0000245,0000

340,0000545,0000200,0000110,0000135,0000

435,0000250,0000285,0000265,0000415,0000

245,0000150,0000340,0000405,0000200,0000

225,0000520,0000

124

Page 129: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAMPLES (CONTINUED)

SAMPLE LATITUDE LONGITUB AA-HN-P

107748107749107750107751107752

107753107754107755107756107757

107758107759107760107761107762

107763107764107765107766107767

107768107769107770107771107772

107773107774107775107776107777

107778107779107780107781107782

107783107784107785107786107787

107788107789

1818181818

1818181818

1818181818

1813181818

1818181818

1818181818

1818181818

1818181318

1818

2020202020

2020202020

2020202020

2020202020

2020202020

2020202020

2020202020

2020202020

2121

21N21N21N21N21N

21N21N21N21N21N

21N21N21N21N21N

21N21N21N21N21N

21N21N21N21N21N

21N21N21N21N21N

21N21N21N21N21N

21H21M21N21N21N

16N16N

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

1212121212

1212121212

1212121212

1212121212

1212121212

1212121212

1212121212

1212121212

1111

18E18E18E18E18E

18E18E18E18E18E

18E18E18E18E18E

18E18E18E18E18E

18E18E18E18E18£

18E18E18E18E18E

18E18E18E18E18E

18E18E18E18E18E

35E35E

320,0000135,0000585,0000470,0000320,0000

380,0000440,0000450,0000730,0000525,0000

640520475705585

425480635350375

380495540470430

395430485395380

400405435335470

425380385340450

240225

,0000,0000,0000,0000,0000

,0000,0000,0000,0000,0000

,0000,0000,0000,0000,0000

,0000,0000,0000,0000,0000

,0000,0000,0000,0000,0000

,0000,0000,0000,0000,0000

,0000,0000

125

Page 130: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

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Page 131: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAMPLES (CONTINUED)

SAHPLE LATITUDE LONGITUD AA-HN-P

107790107791107792107793107794

107795107796107797107798107799

107800107801107802107803107804

107805107806107807107808107809

107810107811107812107813107814

107815107816107817107818107819

107820107821107822107823107824

107325107826107827107828107829

107830107831

1818181818

1818181818

1818181818

1818181818

1818181818

1813181818

1818181818

1818181813

1818

2121212121

2121212121

2121212121

2121212121

2121212121

2121212121

2121212121

2!2121rjj

21

2121

16N16N16N16N16N

16Nm16Nm16N

16NUN16N16NUN

m16N16N16NUN

16NUN16NUN16N

16NUNUN16NUN

UNUNUNUN16N

UN16NUN16N16N

16N16N

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

1111111111

1111111111

1111111111

1111111111

1111111111

1111111111

1111111111

1111111111

1111

35E35E35E35E35E

35E35E35E35E35E

35E35E35E35E3SE

3SE35E35E35E35E

35E35E35E35E35E

35E35E35E35E35E

35E35E35E35E35E

35E35E35E35E35E

35E35E

200.0000353.0000288.0000490.0000440.0000

675.0000755216725

.0000

.0000

.00004125.0000

4003303952981070

420445

.0000

.0000

.0000

.0000

.0000

.0000

.0000420.0000460485

520560565625241

184268460420430

385280265210300

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

.0000

370.0000388.0000230305420

640445

.0000

.0000

.0000

.0000

.0000

127

Page 132: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAMPLES (CONTINUE../

SAHPLE LATITUDE LON6ITUD AA-CU-P AA-PB-P AA-ZN-P AA-AG-P AA-CQ-P AA-NI-P CH-HO AA-CR-T

107832107833107834107835107836

107837107838107839107840107841

107842107843107844107845107846

107847107848107849107850107851

107852107853107854107855107856

107857107858107859107860107861

107862107863

18 2118 2118 2118 2118 21

18 2118 2118 2118 2118 21

18 2118 2118 2118 2118 21

18 2118 2118 2118 2118 21

18 2118 2118 2118 2118 21

18 2118 2118 2118 2118 21

18 2118 21

16N16N16N16N16N

16N16N16N16N16N

16N16N16N16N16N

16N16N16N16N16N

16N16N16N16N16N

16N16N16N16N16N

16N16N

44 11 35E44 11 35E44 11 35E44 11 35E44 11 35E

44 11 35E44 11 35E44 11 35E44 11 35E44 11 35E

44 11 35E44 11 35E44 11 35E44 11 35E44 11 35E

44 11 35E44 11 35E44 11 35E44 11 35E44 11 35E

44 11 35E44 11 35E44 11 35E44 11 35E44 11 35E

44 11 35E44 11 35E44 11 35E44 11 35E44 11 35E

44 11 35E44 11 35E

120,0000114,000065,000020,000015,0000

14,000035,000070,000040,000034,0000

25,000029,000028,000014,00009,0000

12,000012,000011*000014,000031,0000

22,000023,000060,0000151,000088,0000

76,0000106,000070,000099,0000102,0000

110,000066,0000

15,0000O.OOOON15,000050,000025,0000

30,000020,000035,000030,000035,0000

30,000030,000030,000020,000020,0000

35,000015,0000O.OOOON10,00000,OOOON

15,000010,0000O.OOOON15,000020,0000

10,000025,000015,000015,000015,0000

15,000020,0000

30,000039,000055,0000128,000063,0000

77,000032,000035,000037,000047,0000

94,000046,000060,000033,000049,0000

140,000050,000034,000036,000053,0000

22,000049,000037,000041,000048.0000

26,000029,000022,000024,000028,0000

24,000030,0000

0,40000,60000,50000,40000,4000

0,80000,30001,50001,40001,2000

1,30001,10000,80000,60001,2000

0,90000,30000,20000,20000,3000

1,00000,50000,10000,40000,3000

0,70000,70000,30000,50000,5000

0,30000,4000

30,000034,000030,000020,000020,0000

23,000025,000035,000034,000041,0000

30,000023,000025,000018,000020,0000

20,000016,000012,000013,000019,0000

33,000026,000026,000032,000024,0000

27,000026,000020,000028,000031,0000

26,000030,0000

90,000086,000053,000016,000018,0000

24,000077,0000180,0000160,0000200,0000

62,000028,000035,000022,000030,0000

28,000015,000012,000013,000021,0000

51,000043,0000160,0000170,0000175,0000

195,0000200,0000165,0000225,0000205,0000

190,0000185,0000

5,OOOOL5.0000L5*OOOOL5.0000L5,OOOOL

5.0000L5,000015.0000L5,OOOOL5.0000L

5.0000L5,OOOOL5.0000L5,OOOOL5.0000L

5.0000L5,OOOOL5.0000L5.0000L5.0000L

5,OOOOL5.0000L5,000015,OOOOL5.0000L

5.0000L5.0000L5.0000L5.0000L5.0000L

5.0000L5.0000L

395,0000860,000020.0000L

215,0000800,0000

155,0000280,0000565,0000715.000020,00001

620,000020,00001

455,0000325,0000260,0000

430,0000275,0000415*0000295*0000105,0000

265,0000780,0000615,0000385,0000550,0000

1040,0000565,0000625,0000980,0000695,0000

705,0000565,0000

128

Page 133: IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF … · 2010-12-10 · IRON SULFIDE DEPOSITS AT WADI WASSAT, KINGDOM OF SAUDI ARABIA by Ralph J. Roberts, Darwin L. Rossman, Abdulaziz

ANALYSIS OF CORE SAMPLES (CONTINUED)

SAHPLE LATITUDE LONGITUD AA-HN-P

107832107833107834107835107836

107837107838107839107840107841

107842107843107844107845107846

107847107848107849107850107851

107852107853107854107855107856

107857107858107859107860107861

107862107863

1818181818

1818181818

1818181818

1818181818

1818181818

1818181818

1818

2121212121

2121212121

2121212121

2121212121

2121212121

2121212121

2121

16N16N16N16N16N

16N16N16N16N16N

16N16N16N16N16N

16N16N16N16N16N

16N16N16N16N16N

m16Nm16N16N

UN16N

4444444444

4444444444

4444444444

4444444444

4444444444

4444444444

4444

1111111111

1111111111

1111111111

1111111111

1111111111

1111111111

1111

35E35E35E35E35E

35E35E35E35E35E

35E35E35E35E35E

35E35E35E35E35E

35E35E35E35E35E

35E35E35E35E35E

35E35E

430*0000605.0000535.0000325,0000520,0000

585,0000480,0000950,00001360,0000885,0000

1550,0000705,0000

1045*0000605,0000965,0000

815,0000435,0000265,0000343,0000680,0000

635,0000975,0000205,0000315,0000235,0000

310,0000305,0000213,0000215,0000225,0000

250,0000230,0000

129