-..~...-w ii. R Chouinard and ME Woakoe. 22nd. November, GEOLOGICAL REPORT SEVJ-JN CIAIM GROUP, TOV^NSHIP 79 MINKS LTD.

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1 3A -..~...-w i*i 42D15SW A.543 GRAIN 010 GEOLOGICAL REPORT SEVJ-JN CIAIM GROUP, TOV^NSHIP 79 MINKS LTD. BY R* Chouinard and M*E* Woakoe 22nd. November, 1968.

2 IHTKOJJUCMOli Thio geological report refers to a seven claim block adjacent to the woet boundary of the Lakeheud Mines Ltd. patented property in Township 79* Port Arthur Fining W. vision. a) This property is situated in the northeast corner of Township 79, Port Arthur Mining Division. During the mapping program, a base camp WUB established at Wullie Lake which can be reached by chartered aircraft from White River or by a canoe route via Coubran Lake and Mink Creek from Highway l? near Neys. A fly camp was established, by backpacking from Wullie, at a small lake immediately east of the mapped area. b) This property is held by Lakehoad Mines Ltd. with Head Office at t 20th. Floor, 4 King St. West, Toronto l, Ontario* c) Tide geological napping was carried out by personnel employed by Lakehead Mines Ltd* and is being submitted by that company for assess ment work credit. d) The claim numbers of the group mapped were as follows J IB 1JW89, TB TB lji*92t TB 15^9^, and TB e) Geological mapping in this area was carried out between tolt. September and 18th* October though not all this time was spent on this seven claim group. Ground control was by airphoto, enlarged to l" t *too* Scale in conjunction with the surveyed claim boundary* Close traverses across the area were made to locate all outcrops as indicated on the geological map. PREVIOUS WORK The property Hoe within a general area which has seen a considerable amount of procpecting and exploration for mineral deposits* However, no record was found of work done on this particular ground* lie fer once has boon made to the Ontario Department of Mines,

3 Geological Branch, Open File Report Ho. 501**, 'Geology of the Port Coldwell Area, District of Tunder Bay, Ontario*, by Frank P. Puskas* Tiie accompanying Preliminary Geological Map No, Pll4, Port Coldwell Area, wac uloo of value* However, the map and conclusions submitted in this report are somewhat at variance with the above publications* Work during the 1968 field season on this property has been restricted to geological mapping (as part of a much larger area investigated) with some laboratory investigation of potrologlcal thin sections* GiiNKKAL GEOLOGY 'fhis property lies on the northwest corner of the Port Coldwell alkali complex and includes a part of the older sediments into which the complex it; intruded* i'he alkali complex rocke form an approximately circular structure which is concentrically layered* centre with gentle dips. These layers dip inward towards the They have been described as * 1,000 m.y* in age and intrude a sequence of metavolcanics and sediments which have been traced for oany miles* Diabase dykes cut the alkali complex and appear, at this time, to be younger, perhaps much younger, than the rocks in the complex! although this ie based on preliminary mineralogical and structural comparisons \S between these dyke t and the Keveenawan dykes described in many O.D.M. reports i they cut the latter* syenite dykes appear to be younger than diabase dykes as However, they bear a close similarity to dykes described by Puskas as being a part of the alkali coaiples. K OF FOiii-lATI OK Syenite dykes ^ Intru0ive COntact 2 Gabbro Sediments Syenite ~ Intruslve contact ^ Intrusive contact

4 PM'HOLOGY a) Sgdiiaonte Page J The oediraentary rocks are usually well-l&yerod, vdth a difference in (,ridn eis&e in each layer* The average rock ranges from medium to fine* grained, usually brownish medium grey on weathered surface* while the fro oh surface i o f;en rahy very dark grey* In thin sections, the minerals moat commonly seen aret potaoeic feldspar, plagioclase* augite, magnetite while there is minor biotite, ampldbole, chlorite and quartz* b) Gabbro The gabbro is usually a coarse-grained, massive (on outcrop scale) rock in which the ferroraognesian minerals are mainly pyroxenes* The weathered surface is usually light or very light brown while the fresh surface is very light grey* In thin section, this rock displays coarse-grained plagioclase, ^ the most common mineral, pyroxenes and some minor biotite, magnetite, serbentino, sericite and apatite* The plagioclase are rather strongly serlcitised and some pyroxenes grains are altered to an aggregate of carbonate and amphibole* c) Pyroxene Syenide This rock, generally called laurvikite, is coarse-grained, rather masoive and brownish on the weathered surface. The weathered material Generally forme a soft skin less than one inch in thickness* The weathered surface is sometimes darker than stated above, but in our area the plagioclase seemo much more sodic than labrodorite* Thin section exandnation indicates the presence of minor apatite which WUB also in the gtibbro* Minerals are as follows) microcline, plo^oclase (andesine?), lightly altered augite, biotite, magnetite and minor sorpentive, rutile, chlorite and carbonate* Exsolved perthite is aloo present*

5 Pago d) Tho rock called diabase, in this area, is a rather fine-grained rock, v;hich is usually of a medium brownish grey on weathered surface and dark ijc-oy on fresh surface. It cross-cuts the preceding rocket it may sometimes be parallel to the bedding of the sediments. Magnetite is present in ^ood quantity (up to 157#) making the rock heavy. In thin section, the following minerals are identifiedi augite* biotite, plagioclase, magnetite and minor apatite. e) cjjuart.g Syenite dykes Tide rock forms a part of the outcrop in area despite the fact that it in seen regularly. Its relative importance ie due to the fact that it is radioactive. The dykou are never wider tlian twelve inches and usually they are appropriately two inches wide. The rock is coarse-grained to very coorse-tiraihed, v;ith a distinctive pink or reddish weathering color* 'lids color changes, at depth, to a dark green. In thin section, the following minerals appear i microcline, oxoolvod perthite, quartz in minor quantity and aggregates of carbonate! chlorite and biotite as the result of the alteration of the original coarse-grained hornblende. Magnetite is also present* The best structural element seen in this aroa is the attitude of the sedimentary rocks. The well-defined layers strike towards the northnorthc&st and dip etoeply eastward. The contact between thio rock and gabbro ie not seen as it is obscured by overburden. Another contact, that between the pyroxene syenite and the gabbro, ie not a filuirp contact. It is quite ^ratational and is placed on the map as the best approximation possible* 'i'he quartz syenite dykes always make sharp contact with the other

6 Page 5 rocks even if there is aa alteration of the surrounding rook associated with tho intrusion of these dykes. The mineralization on these claims is negligible* There ic magnetite in most of these rocka* the concentration being higher in diabase where it may reach a maxlniura of 15^* Also the gabbro contains a fair amount of magnetite which ie not uniformly distributed* The quartz syenite dykee were investigated, during the sumraer ( for their contents of uranium) rare earths and columbium. Raymond Chouinard 'tacfiaelte*

7 ' Foxtrap Lake Area (M-1719)?fiti.-j r " 1, "s THE TOWNSHIP 79 DISTRICT OF THUNDER BAY PORT ARTHUR MINING DIVISION, SCALE:HNChN4O CHAINS LEGEND CD C\J O O 00 ci PATENTED LAND CROWN LAND SALE LEASES LOCATED LAND LICENSE OF OCCUPATION MINING RIGHTS ONLY SURFACE RIGHTS ONLY ROADS IMPROVED ROADS KING'S H IGHWAYS RAILWAYS POWER LINES MARSH OR MUSKEG MINES CANCELLED NOTES 400* Reserve around all Lake* ft Rivers to Dept. of Lands ft Forests. Area reserved for Park Site shown thus sl withdrawn from stoking - Fife: I i ON l". DEPT. OF WINES l MINiN-G LANDS BR. r His MAP FOR CHECKING! ( -'URPcs:;3 ONLY - MUST l NOT E^ SOL;) PLAN NO, M.I923 9ob K. 42DI5SW A.542 GRAIN 200 Twp. 78 (M-I92I) DEPARTMENT OF MINES ONTARIO

8 TWP 73 N LEGEND QUARTZ S YENITE DIABASE PYROXENE S YENITE GABBRO V" SEDIMENTS ACTUAL G EOLOGICAL CONTACT ASSUMED GEOLOGICAL CONTACT STRIKE /\ND DIP OF SCHISTOSITY A / m ALTERATION ;USUALLY DUE T O (D VEINS OUTCROP O R GROUP OF OUTCROPS CREEKS, S TREAMS E O SWAMP 'CLAIM LINE SURVEYED CLAIM POST UNSURVEYED CLAIM POST TRAVERSE LINES LAKEHEAD MINES LTD. Dotes of survey :Se pt. 4 to Oct. IS N.B: Area covered tnj light to moderately heavy urowth of spruce.poplar, birch ^ o\ders. GEOLOGICAL PLAN SEVEN CLAIM GROUP, TOWWSHIP 79 Scale; IMOO 42DI5SW A,54a GRAIN 210

Nickel Division - Sudbury Operations

* *-.. FALCONBRIDGE NICKEL MINES LIMITED Nickel Division - Sudbury Operations Falconbridge, Ontario 002261 GRAHAM 010 GEOLOGY OF TllE NORTH QUARTER OP LOT 2, CON. IV, GRAHAM TOWNSHIP, DISTRICT OP SUDBURY,