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Assessment Report
Mining Claim 3017371
Cardwell Township
District of Muskoka
Prepared by:
James R. Atkinson, P. Geo.
For Bear Cave Stone
March 31, 2008
III
RECEIV ·
AP 0 ~OOO
GEOSCIENCE ASSESSMENT OFFICE
I Location and Access
The property is located in the Muskoka District of Ontario approximately 300 km north of Toronto
(Figure 1) and approximately 7 krn northeast of the town of Rosseau as shown in Figure 2. The mining
claims that make up the property straddle Bear Cave Road and the Hekkla Road approximately 1 krn
north of Regional Road 3 (Aspdin Road). The property is situated on lots 24, 25 and 26 of Concession 6
and 7 of Cardwell Township. The Property can be seen on Ontario Ministry of N0l1hern Development
and Mines Claim Map T -250/Township of Cardwell. National Topographic System map 31 E/5 covers
the area.
I Property
The property comprises claim number 3017371 comprising 11 units registered in the name of 1156396
Ontario Linited (Bear Cave Stone). The property is shown in Figure 3 in relation to the local topography
and roads.
\History and Previous Work
There is no known recorded work on the property in the Ministry of Northern Development and Mines
records. In 2004 a report was filed detailing an exploration program for flagstone on an adjacent property
(Report titled "Assessment Report Claim 3000777 Cardwell Township District of Muskoka Prepared by:
J Atkinson for Dan H. Atkinson Bear Cave Stone November 24,2004"). The report describes exploration
of a single unit claim to the south of the present property. The filed assessment report included geological
mapping, trenching, blasting and description of a potential flagstone deposit.
It is apparent by visual inspection that loose material has been removed from areas near Bear Cave Road
at some time in the past probably for use as landscape and building stone. In one area in the northern part
of the property minor excavation and blasting work has been completed in the past to remove pink granite
blocks probably for building purposes. This area JS further described below.
I Present Work Program
The property was mapped on a reconnaissance level to determine the general distribution of potential
flagstone and other material suitable for building purposes such and landscape blocks, and cobblestone.
Detailed work was undertaken in areas where favorable material was identified. Minor clearing and
stripping and detailed mapping was undertaken in one area where previous material had been removed
apparently for building stones (The Pink Granite Area) and further to the south in a similar area.
James Atkinson P. Geo. completed the reconnaissance and detailed geological mapping, along traverses
local.ed by handheld GPS. Lots 24 Concession 6 and Lot 24 Concession 7 along with the eastern part of
lot 25 Concession 6 were mapped at a reconnaissance level while more detailed mapping was undertaken
in Lot 25 and 26 Concession 6 and 7 and the western part of Lot 25 concession 6. Detailed mapping was
also undertaken after clearing trail construction in the "Pink Granite Area" situated near the Bear Cave
Road in Lot 25 and 26 of Concession 7.
Physical work including machine trenching, clearing and ~rail building was completed by Tree Frog and
Company Landscaping. This activity included exposing and clearing the area of pink granite near Bear
Cave Road and construction of an access trail in the area to the south of the Pink Granite area to further
explore the extent of the pink materiaL This allowed detailed mapping and measurements to be
completed to evaluate the distribution and potential volume of the Pink material in this area. Material
from the Pink Granite Area was removed for further inspection in the laboratory and for test splitting and
sawIng.
I Regional Geology
The prope11y is situated in the Precambrian Grenville province of the Canadian Shield. The Grenville
Province is subdivided into two major belts: The Central Gneiss Belt and :he Central Metasedimentary
Belt. The Central Gneiss Belt can be further subdivided into the Grenville Front Tectonic Zone which
falls along the northern edge of the Grenville Province. These comprise groupings of similar rocks that
have been juxtaposed together as a result of repeated periods of deformation These terranes have similar
histories of deformation and ages and are often distinct from surrounding terranes.
Grenville rocks are subdivided into a set of allochthonous terranes arranged in the form of a southeasterly
dipping thrust stack emplaced over the southern margin of the Archean age Superior Province. Rock units
within the thrust stack range in age from Archean to late Mesoproterozoic, with older units occupying the
lower levels of the thrust stack, and the younger units the higher levels to the southeast. The flfst-order
subdivision of the Grenville involves recognition of:
1) an external 'Parautochthonous' belt composed of Archean, Paleoproterozoic, and Mesoproterozoic
rocks representing the southern margin of Laurentia during the Mesoproterozoic (generally the Grenville
Front Tectoaic Zone);
2) an 'Allochthonous polycyclic' belt composed of transported Paleoproterozoic and Mesoproterozoic
rocks separated from the 'Parautochthonous belt by the 'Allochthon Boundary Thrust' or 'AET' (generally
the Central Gneiss Belt); and
3) an 'Allochthonous monocyclic' belt formed of rocks largely of Mesoproterozoic age. Rocks of the
Allochtho:lOus monocyclic thrust belt includes three slices: the Central Metasedimentary belt, the
Frontenac belt, and the Adirondack-Morin belt.
Each belt is further subdivided into lithotectonic zones on th~ basis of the tectono-magmatic history of the
rocks present in the zone.
The thrus l: stack, from bottom to top (i.e north to south generally) includes the following rock units:
1) a Parautochthonous unit composed of orthogneiss, qJalizofeldspathic and quartzose paragneiss,
kyanite-gamet schists, and amphibolites. The gneissses are Archean in age whereas the metasediments
y
and amphibolites may be Paleoproterozoic. The sediments may have been deposited in a Mesoproterozoic
age sedimentary basin located between the southern part of the Superior Province and a younger arc to
the south.
The southern part of the parautochthon is occupied by Paleoproterozoic metasedimentary gneisses
thought to represent a juvenile off-shore arc. Grenvillian granites with ages of 1.25 Ga are well
developed in the region of Lake Nipissing. The youngest rocks in the parautochthon are garnet granulite
and amphibolite dike segments and boudins representing the remains of Sudbury diabase dikes. They are
found in all units as far south as the boundary of the parautochthon with the lowermost unit of the overlying allochthonous thrust stack.
2) The lowermost unit of the allochthonous thrust stack, the Algonquin terrane, is composed of high P-T
gneisses (containing eclogites and garnet granulites) which exhibit ages. Some eclogite bodies also have protolith ages of about 1.47 - 1.4 Ga, and metamorphic ages (secondary zircon growth) of 1.09 The
Algonquin terrane is also distinguished by the presence of bodies of coronitic olivine metagabbro with proto lith ages of 1.16 Ga.
3) The thrust slice above the Algonquin terrane includes the Shawanaga domain outcropping north of the Parry Sound thrust slice, and the Ahmic, upper Go Home and upper Rosseau windows south of the Parry
Sound slice. Protolith ages of granitoids are entirely Mesoproterozoic. Eclogites record the oldest metamorphic ages (1.12 Ga) but peak metamorphism could be as young as 1.08 Ga
4) The Parry Sound thrust slice is composed of highly deformed and metamorphosed mafic meta- igneous
rocks bordered to the north by anorthosite, anorthositic gabbro, and amphibolite with an age of c. 1.4 Ga.
The slice is thought to be exotic and far travelled from an oceanic domain to the southeast.
5) The Muskoka slice is composed of 1.455 -1.395 Ga rocks. Metamorphism took place at 1.095-1.025
Ga but may also predate 1.1 Ga. The 1.16 Ga metagabbros are represented in the Muskoka slice but eclogite bodies either do not exist or have been converted to amphibolite.
Those granitic rocks with an age of c. 1.45 Ga are common throughout the Grenville as far north as the
Southern Province-Grenville boundary zone, and are considered by some to represent a post-orogenic
suite of intrusions formed by the melting of older crust.
The Grenville Province is thought to be a low to mid-crustal remnant of a Himalayan scale collisional
orogen that formed between ca. 1200 and 1000 Ma.
The Grenville rocks in the area of the claims have been divided into a number of thrust sheets which define "Domains". The property is situated in the Muskoka Domain near the boundary with the Rosseau
Domain. It is this proximity to the domain boundary which may be responsible for the development of the flaggy nature of the rocks in the area of the property.
The general geology of the area from Ontario Geological Survey Map P 3414 (Lumbers and Vertolli,
200 1) is included in Figure 4. The rocks in the vicinity of the claims are divided into two main units.
Grey Gneiss comprising heterogeneous grey laminated granodiorite to trondhjemitic gneiss rich in
quartzofeldspathic veins, pegmatite, diorite and granitic dykes domina:es the western part of the area.
Monzogranite comprising gneissic pink to greenish, meta luminous rocks with laminated structure and
metamorphic fabric and veined by quartzofeldspathic material and pegmatite underlies the eastern parts of
the area. The units generally strike north-northwesterly and dip shallowly to the east but there appears to
be a basinal structure developed in the area of the northeastern part of the claims. Modification of the
general structural trends can bee seen related to a large fault zone along the creek in the northern part of
the area to the north of the present claims.
I Property geology
James Atkinson P. Geo. mapped the property in a reconnaissance fashion in May 2006 to outline the
distribution of units potentially available to be used as flagstone or other building stone and to identify
area for further detailed mapping. The areas identified as containing potential units of interest were
mapped in more detail in November 2007.
A significant aspect of the geological mapping was an estimation of the potential for the gneiss for use as
flagstone. Where natural breaks occurred in the bedrock exposures the average size of the flaggy material
was estimated. In addition the thickness of the individual folia in the gneiss was measured. Part of the
geological evaluation included attempts to split the rock into tlagstone. The potential to form flagstone
was classified in a qualitative way as poor, medium or good based on the presence of close spaced
foliation or joints and the ease of splitting by hammer or by natural weathering processes . Examples of
typical flaggy material are included in Appendix B.
In addition the ability of the flagstone to be broken was evaluated in the laboratory after sawing and in
directions parallel and oblique to the major foliation using hand held chisels and masons hammer.
The geology of the property can be described as a sequence of more or less flaggy units whicl':. strike
generally north northwesterly and dip generally shallowly to the east. The units are dominantly
quatzofeldsphatic with varying amounts of biotite and hornblende. Some exposures contain material
resembling granitic gneiss which comprises quartz, feldspar and biotite or hornblende. These units are
usually massive and display poor foliation. Broken flagstone is usually grey on the broken surface but
there are areas of where pink and cream surfaces occur when the flagstone is broken.
There is a distinctive "Pink Granite Unit" which traverses the property from north to south from lot 25
Concession 7 to Lot 26 Concession 6. Petrographic examination of samples of this unit (Appendix A)
indicates that the unit is more likely a meta-arkose comprising fine grained serrate quartz (+1- feldspar)
with up to 10% biotite as disseminations and streaks. Although this description resembles the description
of the foliated parts of the Monzogranite defined in the area by Lumbers and Vertolli (2001) the Pink
Granite Unite appears to have restricted thickness more typical of a metasedimentary unit and is overlain
in all areas by a grey granitic gneiss typical of the western parts of the area as described by Lumbers and
Vertolli (2001).
The Pink Granite is exposed in two main areas of the property. In the north close to Bear Cave Road on
Lot 25 Concession 7 and in the southwest on Lot 26 Concession 6. Lack of exposure and structural
"
complications do not allow a direct connection to be made between the two areas but it is thought that
they represent the same unit since they have similar composition and thickness and generally strike
towards each other.
In the northern area the unit is exposed for a length of approximately 200 meters on the east side of Bear
Cave road in a ridge approximately 12 to 15 m high. This area has seen exploitation in the past and was
examined in detail during the recent program. The southern part of the unit occurs on the western edge of
large ridge which originates near Bear Cave road and continues off the property to the south. The Pink
Granite unit dips shallowly to the east in at both locations.
Detailed descriptions of the geological results of the work completed follow:
Preliminary Reconnaissance (May 2006)
Two areas of the claims were examined during the preliminary reconnaissance. The trace of the old Bear
Cave Road was followed from the present Bear Cave Road to the north to the approximate boundary of Claim 3017371. The traverse then continued to the west to intersect the present Bear Cave Road near the
northern boundary of the Claim group. The trace of the reconnaissance traverses are shown on Figure 5.
A second traverse originated also at the northern extent of the former Bear Cave Road and proceeded to
the east along the approximate northern property boundary then south along the approximate eastern
boundary of the claims ending at Hekkla Road in the south. Reconnaissance mapping was also completed
along the western part of southern property boundary in the area of the Pink Granite. This area was further mapped in detaiL
Reconnaissance mapping in the eastern part of the claim group identified generally pink to grey granitic gneisses with massive to poorly foliated structure. The area is dominated by upland terrain and subdued
topography and is generally flat. The area can be described as an "upland plateau". Consequently there are few areas of exposure sufficient to determine if there is any potential for development of flagstone but
generally it appears that the potential in this area is poor. The southern part of Lot 24 Concession 6 near
Hekkla Road has some exposures with foliated aspect and there is sufficient relief to display some
potential for flagstone in this area.
The reconnaissance traverse undertaken to the west from the former Bear Cave road along the northern boundary was mainly in poor exposure and swampy ground but the steep hill which is seen east of Bear
Cave Road did expose well developed flagstone with thin to moderate flaggy material on surface over 1 to 2 m high faces.
The South Traverse was successful in identifying an area with well developed ridges of moderate to good
flagstone in thin to medium thicknesses (i.e 1-2 inches up to 6 inches). An interesting area of exposure of the Pink Granite Unit in this area was identified for further detailed mapping.
Detailed Mapping (November 2008)
The areas identified as having potential to contain significant flagstone were mapped in detail to estimate
the distribution of the flagstone, to evaluate the potential for marketable material and to provide details as
to the potential for extraction (vertical faces , shallow overburden, access etc.). The two areas identified
are situated in the northern and southwestern parts of the claims. Detailed mapping of these areas is
shown in Figure 6A and 6B and locations are described in the field notes included in Appendix A.
Northern Area (figure 6A)
The main focus of this area is a former excavation where it appears that material was removed for use in
building applications . This is an important exposure of the Pink. Granite Unit and it is exposed in a 10 to
15 m high ridge along the western edge of a large ridge. The ridge runs for approximately 500 m in a
north/south direction at distance between 50 and 100 meters from Bear Cave road. . The Pink. Granite
Unit at this location comprises 2 to 6 inch slabs in a well foliated aspect dipping at 20 degrees to the east.
There are abundant large blocks of the material remaining in the excavation to give an idea of the
potential of this unit to from usable blocks and flagstone. The spacing of foliation in this area varies from
2" to greater than 12" and the material breaks readily into slabs of varing thickness between these
extremes. Broken flagstone displays grey and pink. faces while faces across the foliation have a pleasant
pink. color.
The exposure thickness and dip of this unit in this area indicates that there is potentially approximately
150,000 tonnes of readily accessible material in this area.
Southern Area (Figure 6B).
This area is related to a large ridge that occurs in the southern part of Lot 26 Concession 6 that was
identified during the reconnaissance mapping program. The object of the detailed mapping in this area in
addition evaluating the flagstone potential was to trace the exposures I relation to a trail in the area which
may be the former Bear Cave Road . The location of the former road close to the exposures of the Pink.
Granite Unit and well developed grey flagstone points to the potential of this area. Well developed
flagstone was identified over a distance of approximately 150 meters in a ridge between 5 and 10 meters
high. No work has been completed in this area to expose the flagstone but material exposed by
weathering is typified by pieces 2" to 6" in thickness throughout the exposure areas.
I Conclusions and Recommendations
The work completed on the claim group has identified at least two significant areas where exposures of
potential flagstone material area seen. The two areas mapped in detail comprise ridges which are easily
accessible and which contain material that can be readily broken into slabs of between 2" z.nd 6"
thickness. Other potential areas have been identified but not mapped in detail. There is sufficient
exposed flagstone outcropping to allow ease of exploitation based on the presence of cliffs and step slopes
up to 15 m high, available roads and little to no overburden. Access to the material is excellent with
county grade gravel and pavee roads within the vicinity and well developed trails to areas of interest.
It is recommended that Additional work be undertaken to rehabilitate the trail to the southern Pink Granite
Unit exposures to allow some work to better expose the faces and to attempt to remove some of the
material for splitting and test marketing. In the southern Pink Granite Unit the excavation should be
further cleaned and the remaining material be organized and piled . The trail to the south of the
excavation should be used to access this area to expose further material for testing.
I Expenditures
The following is a summary of the expenditures incurred to complete the described work:
Costs
Oa)ls rate Total Geological Mapping 4 $ 500.00 $2,000.00 ncludes Assistant
Cutting , descriptions, photographs, Laboratory 1 $ 400 .00 $ 400.00 test breaking
ReportinglDrafting 3 $ 400.00 $1,200.00
Equipment Rental 2 $ 350.00 $ 700.00 See Invoice from Tree Frog.
Expenses
Mileage 2 $ - $ 253.00 562 Km *0.45/km
Total $4,553.00
I Certificate
I James R. Atkinson of 12 Crooks Street, Hamilton, Ontario do hereby certify:
• That I am a Registered Professional Geoscientist in the Province of Ontario APGO Regisrration
Number 1086;
• That 1 have practiced my profession continuously since graduation from Brock University in 1974 with various mining exploration and consulting companies;
• That I completed and supervised the referenced work and completed the accompanying report;
• That I have an interest in Bear Cave Stone Company.
Appendix A: Figures
FIGURE 1: LOCATION OF BEAR CAVE FLAGSTONE PROPERTY
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FIGURE 2: LOCATION OF BEAR CAVE
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Figure 3: Claim Locations - Cardwell Township, Ontario (From: Mines and Minerals Web Site)
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Figure 4: General Geology of the Bear Cave Area (from: Ontario Geological Survey Map P. 3414; Lumbers and Vertolli , 2000).
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Figure 5: Location of Reconnaissance Traverses
Bear Cave Claim
Group 3017371
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Figure 6A: Details of Work in the Area of Northern Pink Granite Area
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Figure 6B: Details of Work in the Area of South em Pink Granite Area.
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Appendix B: Field Notes
· ..
Date May 22 - Bear Cave RD, Eastern and Northern Traverses Location Easting Northing Designation DescriDtion I
1 611265 5014540 Old Bear Cave Road near north boundary of existing claim 3000776 2 611220 5014900 Traverse along old road area generally flat with poor exposure. Mostly grey granitic gneiss and 3 611330 5015450 amphibolite rich grey gneiss 4 611250 5015750 5 611150 5016100 Turn East bellin traversa eastern boundary area 6 611300 5016180 Large pond to east creek flow SE 7 611400 5016000 near creek
~"~O 5015750 Poor exposure 11550 5015530
611650 5015280 611750 5015000
12 611940 5014750 13 611850 5014450 steeper hill with some areas of vertical esposure up to 2 to 3 m high.
Mod •• " fl"""",~ 14 611840 5013000 Hekkla road 15 611150 5016100 Begin northern boundary traverse
~ "0950 5016000 swamp to north
610800 5015860 swamp to north 610630 5015850 Steep hill locally well developed flaastone exposed I
19 610500 5015830 Bear Cave Road I
· ..
I Date I 10-Nov-07 I
~""'~ Designation
5015430 5015409 ~ ",,' of E=;"lioc N,o; Rood See D,o" 610652 5015452
4 610642 5015480 , 10 to 12 meters high 5 610679 5015410 Pink Arkose exposed, trail to here from skid Road 6 610694 5015405 f1aggy pieces, at end of trail from Skid Road, To west is Pink 7 610682 5015381 Pink Arkose Partly flaggy units 8 610746 5015400 Pink Arkose Flaggy with well developed banding, broken pieces have parallel flat surfaces 9 610755 5015305 Pink Arkose Same exposure as above
10 610773 5015236 Pink Arkose Somewhat coarser grained, more massive. ADDrox. 55 m from road.
11 610795 5015223 Pink Arkose Waterfalls developed on pink layered/flaggy at spacing of 6 to 8 .. with local areas of fractures at 2 to 4", 170/30E
12 610836 5015520 large exposure banded grey on top pink beneath
13 610650 5015520 Pink Arkose close to road 10m high steep exposure, 170/30E. 3 or 4 parallel quartz veins@220/30E. Lower pink layer is well layered and flaggy as is area of contact between two
14 610655 5015535 end of Quartz veins also exposure along NE trending valley 15 610710 5015585 Ridge very well banded mafic gneiss. Layers defined by coarse grained hornblende. Breaks into 16 610737 5015582 area of exposure rounded boulders - not flaggy. East edge swamp. Exposure massive to weakly foliated
~ 610785 5015616 Granitic, massive to weakly foliated. ~ 610853 5015610 ="'" "'.'m,. G. 610910 5015632 banded granitic gneiSS steep dip 190/90 I 610933 5015573 granitic gneis similar to above cut by quartz-feldspar-biotite pegmatite/! banding at
610930 5015520 creek 221 610970 5015405 Edge swamp small exposure grey granitic gneiss 170/40E, mod to good development of
~ flacstone, very well banded
5015290 continuation of above less well banded 5015225 Continues but banding at 220{308 5015120 EXDosure continues
26 610950 5015100 large exposure grey granitic gneis. Foliation @230/70S
27 610885 5015090 28 610870 5015035 Pink Arkose small exposure of dark flagstone with pink streaks aprox. 10 m long 29 610865 5015030 Pink Arkose at road, exposure shows mod well fractured at 6 to 8" 30 610730 5015460
..
Date 11-Nov-07 I Location Easting Northing Desig nation Descriotion
1 611153 5014215 intersection
old BCS Road and Bear Cave Road, swampy at edge road, old well, large exposure of Grey Gneiss in ridge to west
2 611100 5014190 ridge ridge runing N/S grey gneiss 3 611180 5014215 Grev Gneiss Edge of Beaver pond, 3 m high, exposure is well banded and veryflaggy at bottom 4 611060 5014170 Pink Arkose Contact between Gre~neiss and arkose below, Sulphides Tr. Py in shearin9 close to contact 5 611060 5014145 Pink Arkose Well developed flag, layers trend 180/40E 6 611070 5014150 Grey Gneiss WeI/foliated 7 611075 5014120 Grey Gneiss Ridge of well foliated grey gneiss close to old BG road to west more flaggy in 6 m high ridge 8 5014085 Pink Arkose Well foliated and f1aggy in 15 m wide zone along contact with Grey Gneiss 9 5014050 I good flag in arkose and grey gneiss, along 6 m high ridge, foliation 180130E
10 611050 5014015 11 611100 5014020 Pink Arkose Rigde 6 to 8 m high approx 10 m wide 12 611115 5014000
Grey Gneiss Large flag very large exposure 8 to 10m high 13 611139 5013980 14 611125 5013965 Glaim Uine Over large outcrop of grey Gneiss 10 m high 15 611110 5013965 contact GreY aneiss to east Pink Arkose to west in exposure 15 m high, f1aggy at contact 16 611075 5013950 Old Road Road appears to cross creek 17 611010 5013935 Grey Gneiss may have homblende 18 610890 5013965
contact grey gneiss to east pink Arkose to west, foliation 160/65E 19 610860 5013990 20 610860 5014015
Pink Arkose Very flaggy along lake 21 610860 5014015 22 610810 5014060 Pink Arkose Flaggy at 200/50S 23 610874 5014075 Pin~ 24 610895 5014135 Pink to 8' scale
21~0890 5014150 Grey Gneiss foliation at 210/30N 26 0910 5014160 Granitic gneiss Moderate flaggy foliation 210/1 ON 27 0952 5014285 Granitic gneiss Grey and pink, foliation 100/40N, homblende porphroblasts 28 611025 5014315 EdQe pond At narrows on west side, small exposure of Grey Gneiss, foliation N/S dip E 29 610190 5014130 Granitic pegmatite 30 610965 5014130 Grev Gneiss Flaagy at 4 to 6", foliation 020/20E 31 611060 5013970 Stream Pink flaQstone here
611026 5013994 Traverse along old road to get location relative to Bear Cave Road 611077 5014013 611073 5014036 611070 5014037 611075 5014049 611100 5014078 611109 5014108
Old Road 611119 5014131
K11134 5014169 11139 5014187 11150 5014215
I 611156 5014230 , 611201 5014261 I 611169 5014253
Appendix C: Photographs
Typical flagstone pieces form Pink Granite Unit - A verage thickness is 2"
Larger (6" thick) slab of Pink Granite from Northern Pink Granite Unit
Appendix 0: Expenses
Report On Laboratory Investigation
Of Pink Flagstone Samples
Prepared for 1156396 Ontario Limited (Bear Cave Stone)
BY
James R. Atkinson, M. Sc., P. Geo. Geological Consultant
March 2008
Report to Bear Cave Stone on Laboratory Investigation of Pink Flagstone
Objective:
The purpose of the following investigation is to evaluate the potential for the Pink Granite Unit to form useful flagstone slabs and to determine if the Pink Granite Unit can be exploited for one inch and two inch flagstone. The various colors of the broken surfaces will also be noted.
Background:
The potential flagstone producing units of the Bear Cave Cardwell property have been evaluated by the owner to determine if the area is capable of producing commercial flagstone. The units in the area with flagstone include gneiss and a pink arkose or granitic unit. The potential of the gneiss units in the area to produce flagstone is considered to be good and Bear Cave has completed testing in several areas within the gneisses on their adjacent property. The recently completed mapping program completed by Bear Cave Stone on Claim 3017371 identified a distinctive pink unit called The Pink Granite Unit. Examination of samples of this unit indicates that the unit is likely a meta-arkose comprising fine grained serrate quartz (+/- feldspar) with up to 10% biotite as disseminations and streaks. Although this description resembles the description of the foliated parts of the Monzogranite defined in the area by Lumbers and Vertolli (2001) the Pink Granite Unit appears to have restricted thickness more typical of a metasedimentary unit and is overlain in all areas by a grey granitic gneiss typical of the western parts of the area.
This unit seems capable of producing large flagstone blocks averaging 6" to 8" in thickness but may have potential to produce thinner slabs. The present study is related to this potential.
Methodology:
Samples of the Pink Granite Unit approximately 4" thick which had been obtained for the surface exposures of the unit were prepared by sawing with a diamond saw into pieces approximately 6" tall. It was then attempted to split the samples into 2" and 1" slabs using a 4 "chisel and a 3.5 Ib hammer. The cut surface or the natural surface was scored using the chisel for the length of the sample and then split using strong blows with the hammer and chisel. The force required and the number of blows was noted and a qualitative estimate of the "ease of splitting" was made.
Broken surfaces were examined for Petrographic description using a hand lens.
Results:
Petrographic description:
Sample is made up of fine grained serrate quartz (70%) and feldspar (20%) grains
<1 mm to 1 mm in size with 10% biotite and accessory magnetite" The biotite is
generally confined to parallel layers 2 to 3 mm in thickness but is also seen as disseminations within the quartz/feldspar matrix. Biotite is generally <1 mm in size. The
pink coloration of the unit is caused by trace hematite staining between the
quartz/feldspar grains.
Splitting:
Samples were first split into 2" slabs then these were then split into 1" slabs. The samples generally break very easily along biotite dominated layers into 2" thick slabs.
Splitting along the biotite-rich layers could usually be completed with only insipient scoring and a single strong blow with the hammer on the chisel placed on the biotite rich
lens.
The sample was also broken where there were no biotite layers. This required a strong scoring and several strong blows with the hammer. The slabs which were broken
where there was no biotite did not form as readily into slabs based on the difficulty and number of blows with the hammer required but 1" slabs could be formed. The slabs formed were irregular and not consistent in size. It should be noted however that the
break followed the initial scoring indicating that this is an important initial step in the preparation of flagstone and this may have played an important part in the maintaining a consistent thickness of the slabs.
Conclusions
The preliminary testing indicated that the Pink Granite Unit found on the Bear Cave Stone Property could be split into 2' and 1" slabs. The former were more readily made
and had generally biotitic (therefore dark) faces. The latter, since they were formed
where the biotite layers were not present, gave pink granular faces.
It is not thought that the creation of usable 1" and 2" slabs will be excessively difficult but it is recommended that larger pieces be tested to determine the maximum size that
can be SPI; since the value of the 1" and 2" flagstone increases with larger slabs.
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PHOTOS
Photo 1: Examples of 2" and 1" broken slabs of Ping Granite Unit - Bear Cave Stone.
Note: slabs broken using sawn and un-sawn surfaces. Also note how break follows
Scoring when not along biotitic layer (middle pair)
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Photo 2: Biotitic surfaces after splitting 2" slabs.
Photo 3: Pink surfaces on 1" slabs
Photo 4: Scoring of sample for splitting to 1" Slabs.
Splitting 2" Slab along biotitic layer.