report on exploration work mcintyre and castle …

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REPORT ON EXPLORATION WORK

MCINTYRE AND cASTLE-TRETHEWEY CLAIMS

PENHORWOOD AND REEVES TOWNSHIPS

SUDBURY MINING DIVISION. ONTARIO p

MAY 1946 TO JULY 1947.

Submitted By

A. A. Brant

A. E

J. lf\ B . Bonnell

42B01NE0057 63.107 REEVES —— "~"" ••""" l

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N D I'-.'*. 1 : . . .Vv : ; .•v.v" ,:v ;..-, ;..-. . ', -. . . . ''

I INTRODUCTION , . * , , . . . * .. -. *. M *,* i . .**'*^* * * * .Mi* * *

II .. SUMMARY, , , ., ... , ,., ., . .:V:i-* ," Wv*-... i , . |.|-* .".V j'l* V.' :-''.'-.-i.

III. REPEKENCES...... . *-.*., ,,iV'* '*'*f '* '-* •.-*' * -* r * **-** ' *V*'* vftf'.V ̂ *

IV LOCATION AND ACCKSSIBILIty...V* * : ,,.,.Vv*v.^.VU'v..';^''''^ V

V -TOPOGRAPHY AND TIMBKH,... v.:*.. *'.. .v^-:*;i'Vv,* iVt^'^V*-.?':^''

VI GENERAL GEOLOGY (a )^ Format lone , *... ..** i.*;* i f .: 6

{b) Dasorlption of Foj^ai iisn|i 4

(o) General Struoture *j * v.*'. .^ 8

VII GEOPHYSICS ( a) Work D ona/** * * * * *i^;.V v...... * ^ ; 6

(b) Magnetic Work...,......,....**. 9

(o) Interprdtation. **,.,, *i*. .* ..^ . ;9

(d) Structure...,,.,.....*.......,. \l

(Q) Self-Potential......,,....,,.,, IE

VIII CONCLUSIONS . . .. . . . . . . . , . . .. , *. . ,, .. .^ . .y, *.. .^ 12s ' ' '. '-' ' " '/' : " ' , , - '- ' . "' "' -' ' .* ;,

APPENDIX I - Work Summary , j,,. 4*** . * fV* *. ** f. * 13

APPENDIX I I - Table of Rock Samples,.......... 14

LIST or. . . . . . , . .Figure ^ . :\ , . ; ••••''\- , .' ;,;'; " ! '--^ ; ; :': -':'^,;.'-'\ ; '". : ;' * .. .

l. P icket Lin* And Claim Map^ -, :v ! /, : v^:'^v: : ; v/yK:;, ,'''. ;. .. -, ' ', n , ' r . . - - ; "" " , ^ - ' * '. . - ' ' ' ' ' . ' -

B. Topographloal Contours , '

3. Magnetic stations and readings - East and West Sheets *

SA, Area of Detailed Magnetic Work.

SB. Area of Detailed Magnetic Work.

4. Contours of 7*rtioal Magnetic Intensity*East .and West Sheets, , ; .' .' ! . : ':; ; : ; v r: ' ;;C" ; ' ''-;', 1 ;- ; ,.. ; ' -;--.- ;'^ : ; . ;- ^ ' - •'.-''•- ' : '" ",-.."-.--. ' ' .'. ." ' : - ••'•; ' ' ; . - : : --'"

5. Outcrop and Derived Bub "Surf e oe Oeology,

6A. Self-Potential Lines and Profiles, :

6B. Self-Potential tines and; Profile* t

4.

I INTRODUCTION

The formations on the Groundhog River are generally considered favourable both geologically and structurally for cold deposition. The claims staked in March 1946 were on strike with known gold occurrences to the E k W . That exploration work was warranted, was justly proved by the rubsequent gold discovery at Joburke in the Summer of 1946.

The geophysical work, line cutting, etc., August 5j 1946 - July 31, 1947, was undertaken to outline the subsurface formations and where possible structure, to permit geological deductions for drilling tests. In all, the work has encompassed a geological survey, line cutting, magnetometer and some self- potential observations, the study of air p hobo B and the final interpretation and correlation.

II SUMMARY

Geological mapping and sub surface geology derived from magnetometer work result in the suboutcrop geological map of figure 5 showing the presumed bedrock mat erials and structural relationships. Folded areas in the central volcanic bands occur in claims 42615, 48902, 42903, 42904, 42905, 42910, 45047, 43048, 43049, 45050, 43051, 4305E, and to the NE in claims 42619, 42882. Marked shears are expected (i) at the S of claims 4304?, 43048, 43049, 43050 and (li) along the N of claims 42906, 4B6H, 48615 and the B of claims 42617, 42091 into central 42692. This latter shear and the folded area of claims 43048, 43049, 43052, near and N of the former shear are taken as the most significant locations.

Ill KKFKKENCES

E. W. Todd - Qroundhog River Area O.D.M. Report 1924 .

W . D, Herding Geology of the Horwood Lake Area, O.D.M. Vol.46 Part 2,1937.

J. W. B. Bonnell - Report on the Geology of the McintyreClaims, Penhorwood and Reeves Town ships , Ontar lo,

T. Harkness ~ Geology of Castle-Trethewey Mines Claims, Penhorwood Township, Ontario.

8,

IV LOCATION AND ACCESSIBILITY

The Mcintyre and Cestle-Trethewey claims comprise adjacent groups of 77 and 28 claims, numbered and shown in respective relationship in figure 1. The Mcintyre claims are located in south central Reeves and north central Penhorwood townships, SudburyAnining Division. l1 he. Castle-Trethewey group are tied on to thd south of the Mcintyre claims in Penhorwood township,

The claims are reached by air from South Porcupine to Johann Lake, a distance of 55 miles, or by rail via Kuketush, west of Capreol, on the main line C,N,R. and then four and a half miles by a bulldozed road north easterly to camp*

V TOPOGRAPHY

The area is relatively flat, see topographic contour map, figure 2, with 90# covered by swamp, muskeg and drift. Most of the outcrops are flat and small, with the exception of the N,i t area where large porphyry exposures are visible. At the West margin of the Castle claims is a 800 foot high K striking hill,

The timber is spruce, jack pine, cedar, birch and poplar. The birch, poplar and Jack pine are found on the ridges, spruce and cedar in the swamps, A fair amount of mining timber would be available. The timber is, however, owned by the Pine land Timber Company. Charges would be made for all consumption.

VI GENERAL GEOLOGY

(a) Formations

The consolidated rocks of the area, outcrops of which are located in figure 5, are all of preocambrian age* As only a small area was mapped, the following table is a tentative arrangement;

Table of Formations

QuaternaryRecent - e w am p and muskeg accumulations

Pleistocene - olayj sand, gravel, bouldersglacial drift.

Great Unconformity

Pre-CambrianKeweenawan(f)

Diabase dikes Algoman(?)

Carbonatieed Kock T.tlc schist Quartz-feldspar porphyry

Granodiorite, quartz-moneonite, hornblende syenite, gabbro,

hornblendite Oranite

KeewatinSediments

ArgilliteGreywackeConglomerateIron formation

VolcanicsAgglomerateRhyolite 'AndesiteBasalt, limburgite

(b ) De s c r i p t i o n of J o riu a t i o n s

Ree wet in Series

The rock formations of the Keewatin series can be separated into three groups consisting of interbedded basic volcanics, acid volcanics end sediments. Although the sediments are tentatively classed ae Keewatin, no definite age determination hes been made.

V olc an JOB

The basic volcanics are typical "greenstones" and are usually massive basic to intermediate flows* There is considerable textural variation with fine, medium and coarse grained phases. On the whole, the rocks in this group are classed as intermediate. On the fast Mcintyre ground an ultra basic flow classed as altered basalt or limburgite was found. It i s a very fine grained, dark grey rock and^rery rich in magnetite.

Aojd Volcanics

The main bodies of acid volcanics are on the West group of claims, and consist of bands of agglomerate interbedded with andeeites. This rock weathers very light in colour with the fragments standing out a ttita plainly.

Rhyolite was tound near the K. W* edge of the S. D. granodiorite plug, and south of Jehann lake, A thin section was made from the latter spot and it was found to be 75 per cent carbonated.

7,

Sediments

Two belle of sediments have been found. One, consisting of argillite, greywacke and conglomerate, extends approximately East-West just North of Jehann lake. No facings were definitely determined, but a South facing was suggested from the gradation in pebble size in the conglomerate. The second belt is located near the North central section of the claims. The conglomerate here shows pebbles of intrusive and lava composition. No facings were determined* Greywacke was exposed in this area in several small trenches and appears to lie North of the conglomerate. It was found to be heavily she are d .

One small band of iron formation was found by trench ing on a magnetic anomaly on claim 3-43778. The rock is typical banded iron formation.

AIgomanj? J Int rus i v e s

'i'he Keewatin format lone are cut by bodies of intrus- ives, mainly acid in composition. The types are quartz-feld spar porphyry, crenodiorite and granite*

Several masses of quartz-feldspar porphyry are found on the West group of claims. These rooks are fine to medium grained, grey tp pinkish in colour, showing some carbona tization and some pyrite mineralization.

On the East group a plug of granodiorite wes found* The rock is pyritized and in spots carbonated. Numerous intrusive phases consi|ting of quartz-monzonite, hornblende syenite, gabbro and hornblendite were found along the Northwest contact.

Granite was found along the South East boundary in two small outcrops. Tne rock is medium grained, grey to pink showing some biotite.

Car bo a at i z e d R o o k .

Several sections of carbonatized rock were discovered varying in degree of carbonatization from very slightly to well. On the weathered surface, these rocks showed a reddish-brown gossan. South of Jehann Lake a fairly continuous zone was found showingBorne pyritq/mine ralizatloti, ,

e.

Talc Schist

An area of highly talcose and carbonated schist was found in claim No. D-42619. This alteration ie believed to be duo to the known granodiorite intrusive on the adjacent property to the south.

Ke we en a wan t ? ) Int rue i ve

Three very small outcrops of diabase mere contacts were observed and no strikes determined*

found. N o

(c) General Structure

Due to lack of outcrops and the absence of such structural features as pillows, flow top, etc*, little le known of structure from geological evidence. South facings were suggested in the conglomerate band North-west of Jehenn Lake, by gradation in size of pebbles grading from large on the North to email on the South,

W. D. Harding in "Geology of the Horwood Lake Area 1*, O.D.U, Volume 46 part 8, 1957, states, that the area has been subjected to at least three periods of deformation) Haileyburian, Algorn&n and Keweenawan, with the Algoman most important*

From geological evidence it would appear that on the West Group, between Mcintyre and Castle-Trethewey, a fold exists.

All rocks in the area show some shearing with the most intense concentrated along the south boundary of the large porphyry mess, and north of the porphyry on claims S-48906 and S-42611,

VII GEOPHYSICAL

(a) Work Done f

The geophysical work comprised an overall vertical magnetometer survey Fig, 3, with several areas of additional station coverage and s OKI trenching, figures 3A and B, and local self-potential readings, figures 6A and 6B.

The vertical magnetometer survey covered both groups of claims with K-S line i 800 feet apart and stations at BOO foot intervals, with additional stations and lines where magnetic changes occurred or when the development of the magnetic cont our picture warranted. In all, some 55 miles of picket line and

miles of surveyed line were run and some 3000 stations occupied.

9.

50,000 feet of line wes observed by the self-potential procedure at 50' stations. Pour locations were trenched to check anomalous conditions. Laboratory susceptibility tests were carried out on 65 samples. See appendices l and II.

(b) Magnetic Work

The vertical magnetometer readings were made with two Askunia magnetometers of scale constants 20,5 gamma and SB.5 gamma per scale division, The readings were corrected for magnetic changes during the day and from day to day. The probable error of the corrected readings on the basis of repeated stations (not base stations) was i 15 gamma,

figure Z s hows the cut lines, magnetic stations occupied and the corrected values of vertical magnetic intensity. Fig. 4 shows the derived magnetic contours. Figures 3A and SB indicate the results of detailed work at two anomalous areas* Eventual trenching showed A to be due to iron formations and B to basalt with magnetite.

(c) Intrepretation-x

Figure 5 shows the outcrop geology and the subsurface geology derived from the magnetometer work.

The north central and N .W, portion of the claims are underlain by quartz-feldspar porphyry which normally appears to be uniformly magnetic, However, off the margins of the porphyry and within the porphyry, anomalies occur. Anomalies off the porphyry are likely the result of magnetic minerals released by the porphyry intrusion. Those within the porphyry are felt to result from volcanic remnants or volcanics digested in the porphyry with the magnetic minerals magnetite and pyrrhotite in addition to pyrite being released on the marginal areas between the two. Thus the uniform area of porphyry on the west central claims represents an originally elevated area of porphyry with a considerable portion cut-off by erosion. The long E.W. striking anomalous area Just north of the 7384 K line IB suspected of being an original valley in the porphyry surface with erosion leaving volcanic remnants and altered porphyry ju*t below the originally overlying volcanics, To the east of 4800 W tlis anomalous zone is thought to b e repres ented largely by volcanics, to the west largely by porphyry. North of this zone IB a further area of originally more elevated porphyry with the low readings in the N.W, signifying a finger of porphyry originally considerably,elevated and now relatively more deeply eroded. 4,

(x) Please note figure Z o r 4 for actual grid locations of magnetic conditions used in assisting to develop figure 5.

10.

Porphyry then le expected to underlay the K.W* corner area at no great depth; ae a consequence its economic propsects are not considered favourable. The evidence for this IB the irregular distribution and limited extent of the possible volcanic remnants as well as some evidence of flat dipping margins to the porphyry in three cases .

The eouth eastern claims consist essentially of grano diorite and associated phases occupying a broad N .B. - S.W. band with fingering contacts off which favourable conditions nay be felt to exist.

S.E, and N.W, of the granodiorite are separate belts of it, h f, ne tic basalt volcanics. The southerly belt strikes slightly south of west with gentle left handed flexures gradually carrying it south. The northerly band interfingere to the N ,E , of Jehann Lake with intermediate andesitio volcanics which in turn lie north of t sedimentary series end strike K -W,

Two possible, though very tentative E - W shears, may be present off the west shoulders of the granodiorite ae shown. A N - S structural lineament recognizeable on air photos and matching the west margin of the granodiorite is also indicated. The general area off the west end of the granodiorite does not appear irregular or disturbed magnetically. Geologically the rocks are fresh.

At, and South of Jehann Lake, the south central claims consist in the north half of normal andesites and in the south half of a quite non-magnetic andesite or dacite. The strike ae shown by the lines of magnetic property change is essentially E-W with little flexuring. Little evidence of structural stress or disturbance is diecernable. A N-S structural lineament is indicated and is confirmed by air photographs with an associated gentle left- handed flexure but without any associated magnetic evidences of mineralization or shearing. The large anomalous area south of the lake claim S-43063 appears to be the result of scattered magnetite in a basaltic variation of the volcanics (see sample 84 Appendix II) Mineralization may in part have been released by porphyry fingers (some are present near the boundary in the property to the west) or by the conjunction of the indicated K-S lineament (fault) and tenta tive E-W shear .

The series of volcanics at,and south, of Jehann Lake extend westward acrops the intervening property to the westerly line of claims. Local gentle flexures in strike appear present ae indicated,

The extreme 3,^0, claim contains a band of I,?, aboutSO 1 wide. Its extent beyond the central part of the propertyto the east is not evident*

11.

The west central, central end northeast portions of the area consist of a broad belt of mixed volcanics, striking initially westward, but folded centrally to a N. N.K, trend t and in the east deflected northward by broed intrusive lying largely off the prop erty.

The belt of volcanics has been separated into areas of consistent magnetic properties which in general give the picture of a sequence of conformable volcanic formations made up of alter nate more magnetic and lees magnetic phases* ^hese areas also indicate the general strike and flexuring of the formations.. From this It will be seen that the most significant flexurings occur, (i) for about 1& claims north of the DON line from atout 10400W eastward, (li) off the S,K. margin of the general quartz porphyry area, and (lil) in the S.E, angle of the north claims. The flexurings would appear to consist of two broad left handed sweeps in the U.K. and south central areas with consequential lesser left-handed dragging.

i'he zones of marked flexuring within this and along the south margin of the main porphyry mass the most interesting locations.

volcanic belt are considered

To conform to the deduced folding and in part giving rise to it, the central intrusive just off the property boundaries has been postulated. Its existence at several points is known.

(d) S true ture

Evidences indicative of shearing such e e re-entrant contours, aligned lows, sad well marked straight line contours are present giving the series of i!-W shearings shown. Question marks signify more doubtful indications. ,

Certain of these shears appear definite and significant, e.g. the two northerly (toes in thei North central claims. The more southerly one of these significantly lies along a contact to the K and the couth boundary of the main porphyry mass to the west*

A strong magnetic indication of E*W shearing is that Just at the OON line. Also south of this the formations strike E-w and are gently flexural, while immediately to the north a fairly definite drag appears present.

Other K-W shears are likely present in the central folded area and possibilities have been marked.

Strong evidence of a significant N-i* fault and shear exists in the east part of the north block of claims/where JB-KSI magnetic contours are seen to swing north and then N,E. This fault or shear may continue due south ( a lineament is present but no dragging evident), but more likely swings south wept as shown, as evidenced by e definite low between two areas of hiph (OON, 8000W) end the**.E. strike of shearing in outcrops, claim S-43048.

18,

It is felt that original E-W striking formationswere displaced by the N.W, porphyry mass and the cnetral intrusive into the depicted trend of left handed broad drag folds. The central intrusive seems to have been the active force, for the resulting left-handed flexures, E-W shears and East of North faults ere whet would have resulted from a/localized east to west force and a pa e Rive southern segment,

K-S lineaments of magnetic boundaries occur and are confirmed by air photos. The direction, st ra i gh t ne s e and region - ality of these features indicate they are regional transcurrent faults associated with regional folds somewhat north of east, perhaps of the immediate post Temiskaming period. Magnetic condi tions conform little to their presence. If they have been signi ficant, some magnetic mineralization and displacement of forma tions along them by later forces might be expected, ^either of these are evident from this work.

From the magnetic work the main areas of significance are the folded volcanic belt particularly (i) just north of the DON line and (ii) in the 7384N, 4000W area j also along the south margin of the main porphyry mass and to the East i,e., along the south margin of the agglomerates. Of lesser significance appears to be the margins of the S.E. granodiorite,

(e) Se If-Potential Work

The self-potential observations were carried out in the customary fashion using copper sulphate solution, porous pot electrodes and D.C. potentiometer reading to l millivolt. All the readings were tied in and where possible closed loops wererun.

The results are depicted in figures 6A and B. In figure 6A the presence of disseminated sulphide mineralization is deduced from 10400W to 7600W along a presumed shear. Self- potential lows which indicated possible sulphide mineralization are marked on the figure.

In figure 6B the self-potential lowe may, with two exceptions, be ascribed to topography. Those possibly due to sulphide mineralization are marked on the figure.

Since self-potential readings are markedly affected by topography, the topographical contour map (figure 2) was used to check anomalies with local topography.

y 11Im 6 0 n o l us j on s

From the derived suboutcrop geological and structural picture of figure 5, it is evident that rock types and geological conditions favourable to gold deposition are present. The areas mentioned in the last paragraph of VII d, page 11, warrant testing followed by a revision of the mapping end possible further work.

l

13.

APPENDIX I

Work Summary

(a) Line cutting

(i) 10.96 miles of surveyed base line (li) 55 miles approximately of picket line

(b) Magnetic stations established

3000 approx. with the major portion at 100' to 800'intervals*

Some detailed work was done at intervale as short as 10'*

(c) Self-potential work

Approximately 10 miles of work was done with stations at 50' or 25' intervals. Some of this work does not show on maps as muskeg conditions prevented reliable results.

(d) Trenching and stripping

(i) Claim No. S-43778, size 80'x 3'x 10' deep, trenchedon a magnetic high. Disclosed typical iron formation.

(li) Claim No. S-48589, size 150 sq. ft, average depth 8'. Trenched on a magnetic high. Disclosed altered basalt rich in magnetite*

(ill) Claim Ko. S-48603, size of 3 trenches average 80* x3* x 3 1 deep. Trenched on observed shear. Disclosed mineralized sheared greywacke.

(iv) Claim S-43060 size of 4 trenches average 4' x S 1 xl^' * trenched on mineralized zone.

(e) Susceptibility Tests

Approximately 65 samples from the area were tested for magnetic susceptibility using laboratory methods. See Appendix II.

(f) Thin Sections

Twelve thin sections of doubtful rook types were made and microscopically identified by Q. D. Furse.

14.

APPENDIX II

TABLE OF ROCK SAMPLES

The table below gives a list of samples taken includinglocation ae in Figure S, description and magnetic susceptibility.

Fie. 3No .

1234567B

91011

12131415161718

Locati on

W14500, N9100W14500, N9100W14450, N8300W12100, N1200W12425, S4150W12250, S4270W10400, N2200W8800, N8300

W9200, N9200W9300, K7334W9000, N8000

W8800, N8000W9400, N5600VY9400, N1300W8938, S200W7600, N1300W7200, N1300W5590, S3785

19

20212223242526272829303132333435

W5600, EJ4785

W5200,W5000,W7650,W4550,W4500,W3300,W3400,W3700,W3200,W2500,W2500,W2500,YJ2850 ,W2400,W2450,E300,

K48008800NE200S3600S4600K 54 0082200S2250S3600S5500N5550N5500S2200S 24 00B2300S1800

Description

Suscepti bility xlO6 0,0,8. Unite

Greywacke Feldspar porphyry Feldspar porphyry Agglomerate ? Andesite, possibly dacite Iron formation, polarity Sheered andesite with sulphides Feldspar porphyry with small amounts of sulphides and quartz Feldspar porphyry Slightly sheared conglomerate Sheared greywacke, 3 to 5# finely divided pyrite Sheared greywacke GreywackeFragment from agglomerate Sheared andesite with pyrite Silicious greywacke highly carb. OreywackeCarbonated basalt with pyrite and magnetiteHighly carbonated andesite with cubic pyri te Feldspar porphyry Cherty argillite

-.AgglomerateHighly carbonated andesite Slightly carbonated basalt Basalt with magnetite RhyoliteRhyolite well mineralized Carbonated andesite

O60

5,000 100 100

100,000 9,500

3,0003,100

O

O100

O20,000

509,500

100

15,000

60

Moderately carb.Tile schistfiisio andesiteDiabaseBasic andesiteHighly altered basalt

(large phenocryets)400100

9,500 500

9,500 40,000

O O

100 200 100 200 400

7,500 300

flow top 300

talc, schist

Fig. 3No .

363738A38B38C394041

48434445464748495051585354555657585960

Locat ion

E400, S8800K600, S8650E1000, S150E1000, S150E1000, S150E1600, NOOE3800, S3810E3200, S3590

E3400, 83810E3575, S3470E3590, S3450E3590, S3450E3575, 83740E3575, S3590E4BOO, N1100E4900, N900E4900, N700E4900, N600E4900, N400E4950, N250E4950, N200E4950, HIOOE5100, NOOE 56 00, SOONE6900, N3200E7200, N1200E8000, S1200

APPENDIX I I (oont'd)

Description

15.

Suscepti bility *106 C.O.S. Unite

diabasic ?

Slightly carbonated rhyoliteAndesiteBasalt, fine grainedBasalt, med. grained,OiabaeeBasaltBiotite graniteHighly altered basalt or

limburgite OraniteAltered basalt Acid dikeSlightly carbonated andesite Altered lava with epidote BasaltGranodiorite or hornblende syenite Quarts: monzonite or granodiorite Trachyte Granodiorite Granodiorite GabbroHornblendite Altered gabbro Greywacke {possibly float) Granodiorite Andesite Granodiorite Altered basalt

100100

8,0003,0009,600

60,00050

50 ,000 50

15,000 O

300 500

50,000100100

OO

100100600100

5,000100100

O15,000

Additional Miscellaneous Samples

Iron formation 100,000 Quartz diorite with pyrite and

arsenopyrite, carries Au value 800 Greywacke 200 Diorite with pyrrhotite 8,000 Highly carb, lava, gold ore O

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L l G E NO

MAGNETIC COM TOURS DEFINA t f

MAGNET f C CONTOURS ASSVMG&

PtCKET UNESt STATIONS t COfiPZCTED MAGNETIC VALUE

SAMPLE ffCFffffMCE NUMBER

M*INTr#E f CASTLE JOINT BOUNDARY

M IN. TO - 2OQ GAMMA S

-400 TO 00

00 TO 100

190 TO J00

300 TO 9000 "

/000 TO MA JT.

TO REDUCE TO O.O.M. BASE STATION ,AT SOUTH PQfiCUP/NE ADD 58,5QO 2C GAMMAS

STM TtOti VALUES NAVE BEEN OMfTTfO IN\ ANOMALOUS AfifAS DUE TO INSUFFlCltH T

l'07

42B01NEB057 63.107 REEVES

MAGNETO

CONTOURS OF ( MCINTYRE &

PENHO sue.

EAST SHEET,

A/

LEGEND

MA G NE TIC CON TOURS DE TINA T E

MAGNETIC CONTOURS ASSUMED

PICKET LINES. STATIONS J C ORRECTED MAGNETIC VALUE

SAMPLE REFERENCE NUMBER

MCINTYRE l CASTLE JOINT BOUNDARY

MIN. TO -200 GAMMAS

-200 TO 00 "

00 TO 100 "

100 TO 300 ft

300 TO 100 O

1000 TO M A if, "

A/

LzGEND

CONTOURS DEFINATE

MAGNET/C CONTOURS ASSUMED

PICKET LINES, STATIONS t CORRECTED MAGNETIC VALUE

SAMPLE NUMBER

•J t *-

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MCINTYRE * CASTLE JOINT BOUNDARY

M IN TO -200 GAMMAS

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00 TO (OO "

100 TO 30O f

300 TO (000

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REDUCE TO O.D.M. BASE STATION AT SOUTH PORCUPINE ADD 58,5OO t 2O GAMMAS

C ONTO M

42B01NE0057 63.107 REEVES 240

EAST SHEET

MA G NE TIC CONTOUR S BEFiNA T E


PICKET LINES, STATIONS A CORRECTED MAGNETIC VALUE


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42BB1NE0057 63.187 REEVES

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LEGEND

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SCALE UN ^ 400 FT

SHEARING OBSERVED M TH 5 TO 7 PERCEN T FINE D ISSEMINA TED PYRl TE

SHEAR ASSUMED FROM MAGNETIC E VIDENCE

SELF ~ POTENTIAL L INES

PICKET LINES t BASE LINE

QUARTZ - FELDSPAR PORPHYRY

CONGLOMERATE

AGGLOMERATE

GRANODIORITE

42B0INE0057 63.107 REEVES *^280

.f

H ;

J

SCALE IIN^4QQFT HORIZONTAL

" l IN SO MV VERTICAL

H

FIG. 6A

SELF- POTENTIAL L M/FS Z PROFILES

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PENHORWOOD S, REEVES TWPS.

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42B01NE0057 63.187 REEVES

/G. 65

LINES 8, PROF l L ES

M C INJYRE fi CASTLE- TRETHEWEY CLAIMS

PENHORWOOD A PEEVES TW PS,

SUDBURY MIMING DIVISION QNT.

230

C* t TOt*#S Q* VBfiTtCAt.

MAGNETIC WORK

woo t Reeves

42BB1NE0057 63.107 REEVES

^:rf:'S

MAGNETIC STATIONS A PICKET

LINES

CONTOURS Of VERTICAL MAGNETIC INTENStTY

— — PROPERTY BOUNDARY

ASSUMED CONTOURS OF

VERTICAL MAGNETIC INTENSITY

42B01N600S7 63.107 REEVES 310

FI G 33

AREA OF DETAILED MAGNETIC WORK

MCINTYRE 8, CASTLE- TRETHEWEY CLAIMS

PENHORWOOD t REEVES TWPS.

SUDBURY MINING QIV tStON ON T

SCALE UN. ^ SO FT. 6 A UG. 1947

WEST SHEET

20? .238 *2*4 -net. U

MAGNETIC STATIONS 8, READINGS

CONTOURS OF VERTICAL MAGNETIC INTENSITY M CINTYRE 8. CASTLE-TRETHEWEY CLAIMS

PENHORWOOD & REEVES T WPS.

S*SEE FIG. 6MB

SUDBURY MINING DIVISION O NT

SCALE /W=400rT 3 -8-47

w/4 (? vf r/c co^ ro^/p 5 DEHNA re


PICKET LINES, STATIONS 4 C ORRECTED MAGNETIC VALUE


M'lNTYRE A CASTLE JOINT BOUNDARY

M IN. TO -200 GAMMAS

-200 TO 0 0 "

00 TO tOO "

tOO TO 300

300 TO 1000

tOOO TO MAX.

r o o.o. M. BASE STATION AT SOUTH10 GAMMAS

^STATION VALVES MAYS BttN QWTrCO M AM

SPACE

FIG. 3MAGNETIC STAT/OM

WtTH

CONTOURS d VERTICAL

PENHORWOOD 8 REH VE SMWJVff 0/WSIOM

l M.

s

WEST SHEET

T/C VALUE

TH PORCUPINE ADD 58,5OQ 20 GAMMAS

CONTOURS OF VERTICAL MAGNETIC INTENSITY MCINTYRE Z CASTLE-TRETHEWEY CLAIMS

PENHORWOOD 8. REE VE S T WPS.SUDBURY MINING DIVISION O NT

SCALE UN=40QFT 3 - 8-47

- C

LEGEND

MAGNETIC CONTOURS DEFtNATG


PICKET LINES, STATIONS S CORRECTED MAGNETIC VALUE


MCINTYRE S. CASTLE JOINT BOUNDARY

MIN. TO -ZOO GAMMAS

-200 TO 00

00 TO fOO "

100 TO 300

300 TO 1000 "

ICO O TO M A if. "

N

TO REDUCE TO O.D. M. BASE STATION AT SOUTH PORCUPINE

ADD 56,500 ± 20 GAMMAS

FIG. 4

"4'*1l-

CONTOURS OF VERTICAL MAGNETICM'lNTYRE A CASTLE-TRETHEWEY CLAIMS

PENHORWOOD 8, REEVE S TWPS.SUDBURY MINING DIVISION O NT.

SCALE UN. 400FT. JI-7-4T.

ei

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