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GM 37029 REPORT ON THE LARDER LAKE CLAIM BLOCK, VENTURE 175 REPORT ON THE LARDER LAKE CLAIM BLOCK VENTURE 175 for PLACER DEVELOPMENT LIMITED by A. C. A. HOWE INTERNATIONAL LTD. T. P. MacMichael, B.Sc. Ministère de l'Énergie et des Ressources Gauverngment Québec Documentation Technique 3 0 AVR. 1981 RATE: 3702:9 Ne. ~.: REPORT NO. 421 JANUARY 7, 1981 TORONTO, ONTARIO A. C. A. HOWE INTERNATIONAL LIMITED TABLE OF CONTENTS PAGE INTRODUCTION 1 PROPERTY 2 LOCATION AND ACCESS 3 TOPOGRAPHY 4 PROPERTY GEOLOGY 4 STRUCTURE 8 GEOPHYSICS 9 Radiometrics 9 Magnetics 10 GEOCHEMISTRY 11 Rock chip samples 11 Heavy mineral samples 12 Soil Samples 12 DISCUSSION AND CONCLUSIONS 13 RECOMMENDATIIONS 15 Phase I 15 Phase II 16 ESTIMATED COST OF PHASE I 16 CERTIFICATE 17 APPENDICES: I - Assays II - Letter from Peter Kowalczky concerning airborne radiometrics III - Photographs IV - Maps A. C. A. HOWE INTERNATIONAL LIMITED INTRODUCTION Placer Development Limited holds a group of 425 contiginous leased claims in McGarry and McFadden Townships, Ontario and Dufay Township, Quebec. The property, situated along the Ontario-Quebec interprovincial boundary is centered 14 kilometers east of the village of Larder Lake. The claims are easily reached by an all weather dirt road running south along the Ontario-Quebec interprovincial boundary line from Highway 66. This boundary road passes Mount Cheminis which has the highest point of elevation on the property of 506 meters. Mount Cheminis also exhibits a typical vertical section of the Lower Cobalt group sediments. Claims can also be reached by boat on Larder Lake, Raven Lake, Lac Buies and Lac Drapeau. The project was undertaken with a view of a paleoplacer gold target in the Lower Cobalt group conglomerates. No known exploration for paleoplacer gold has been carried out on the property. The exploration program consisted of geological mapping, checking outcrops radiometrically and magnetically, chip sampling and collection of heavy mineral and soil samples. A helicopter spectrometer survey delineated five radiometric anomalies associated with greywacke shales. The rocks of interest, the Lower Cobalt group rocks of the Huronian Supergroup, unconformibly overly the Archean greenstone, metasediments and plutonic rocks. Here the basal unit of the Lower Cobalt group consists chiefly of greywacke, grit and paraconglomerate, the paraconglomerates being the most favoured host for gold mineralization. Clasts in the paraconglomerate are subrounded in shape and poorly sorted. Gold values in the paraconglomerates range from trace to 0.04 ounces per ton. The nature of the gold, whether.free or contained in the volcanic clasts is unknown. In total, 36 rock chip samples, 32 heavy mineral samples and 46 soil samples were collected. At the time of writing this report, analitical investigation of the heavy mineral samples was still in progress. No results were available. A. C. A. HOWE INTERNATIONAL LIMITED -2- PROPERTY Placer Development Limited holds a group of 425 contiguous leased claims in McGarry and McFadden Townships, Larder Lake Mining Division Ontario and Dufay Township in Quebec. The claims may be more particularly described as follows: McGary Township (80 claims) L 544882 to L 544883 L 546520 L 550618 to L 550621 L 555089 to L 555098 L 555144 to L 555175 L 568039 to L 568069 McFadden Township (173 claims) L 524799 to L 524808 L 550622 to L 550627 L 550924 to L 550934 L 552914 to L 552933 L 554149 to L 554153 L 555846 to L 555865 L 555906 to L 555925 L 555960 to L 555979 L 566523 to L 566531 L 567148 to L 567177 L 567362 to L 567371 L 568991 to L 569000 L 577501 to L 577502 A. C. A. HOWE INTERNATIONAL IIMITED TN A . C King Kirkland . A . HO Kirkland WE Lake ~rginiatown INT ER NATI Larder PROPER TY Lake ONA L LIM IT ED 48°00' — LOCATION MAP scale of kilometers 0 s I -3- Dufay Township, Quebec (172 claims) 389769-1 to 389769-5 389786-1 to 389786-5 389770-1 to 389770-5 389787-1 to 389787-5 389771-1 to 389771-5 389788-1 to 389788-5 389772-1 to 389772-5 389789-1 to 389789-5 389773-1 to 389773-5 389790-1 to 389790-5 389774-1 to 389774-5 389791-1 to 389791-5 389775-1 to 389775-5 389792-1 to 389792-5 389776-1 to 389776-5 389793-1 tc 389793-5 389777-1 to 389777-5 389794-1 to 389794-5 389778-1 to 389778-5 389795-1 to 389795-5 389779-1 to 389779-5 389796-1 to 389796-5 389780-1 to 389780-5 389862-1 to 389862-5 389781-1 to 389781-5 389863-1 to 389863-5 389782-1 to 389782-5 389867-1 to 389867-5 389783-1 to 389783-5 389868-1 to 389868-5 389784-1 to 389784-5 389869-1 to 389869-5 389785-1 to 389785-5 389872-1 to 389872-5 389873-1 to 389873-3. LOCATION AND ACCESS The property, situated along the Ontario-Quebec interprovincial boundary, centred 14 kilometers east of the village of Larder Lake occurs south of highway 66 adjacent to the eastern shore of Larder Lake. South from highway 66 an all weather dirt road traverses the central area of the claim block along the Ontario-Quebec interprovincial boundary. Unmaintained trails and logging roads occur throughout the area. The western and southwestern claims can be reached by boat on Larder and Raven Lakes. Lac Buies and Lac Drapeau provide access to the south- eastern claims in Quebec. A. C. A. HOWE INTERNATIONAL LIMITED -4- TOPOGRAPHY Relief on the property varies from a base elevation of 260 meters along the shores of Raven Lake to 506 meters atop Mount Cheminis. The principal physiographic feature on the property is a north-northeasterly trending terraced ridge bisecting the property on the Ontario side of the claim block. Mount Cheminis lies on this trend. PROPERTY GEOLOGY Geologic mapping was carried out from July 23 to August 6 and September 6 to October 6 inclusive. Mapping was conducted at a scale of one inch equals one-quarter mile utilizing aerial photographs. Data was transferred and drafted over a 1:15000 scale photo mosaic. Traverses were designed according to outcrop location on the aerial photographs. More than 90% of the property is underlain by Middle Precambrian Huronian sediments of the Cobalt group. These sediments are gently dipping and unmetamorphorsed greywackes, conglomerates and grits of the basal member of the Gowganda Formation of the Lower Cobalt group. Cobalt sediments unconformably overly Early Precambrian (Archean) metasediments, metavolcanics and plutonic rocks. The unconformity is exposed on the Quebec claims and trends approximately north-south. Pontiac group metasediments and felsic intrusives make up the Archean rocks on the Quebec portion of the property. Late Precambrian diabase dikes intrude the above rock types in northeasterly and north-northeasterly directions. Surficial deposits consist of glacial sand, gravel and clay. See Geology Map in appendix IV. Rock types encountered on the property are presented in Table 1 and are described as follows from the oldest to youngest. -- The Archean consists of Pontiac group biotite gneiss intruded by granite. These rock types were observed when delineating the unconformity on the Quebec portion of the property. The granite is a light orange coloured rock often foliated and segregated into felsic and mafic bands. A. C. A. HOWE INTERNATIONAL LIMITED The granite-biotite gneiss contact is characterized by a wide injection zone. The biotite gneiss in this zone becomes more metamorphosed toward the contact. The granite also intrudes the gneiss as dikes and irregualr masses. Radiometrically the gneiss averages 40 counts per second while the granite averaged 70 counts per second. Magnetically the gneiss and granite measured 0.0 to 0.1 cgs units. TABLE 1 - Rock types Mafic intrusive rocks - diabase dikes Huronian supergroup Cobalt group Gowanda formation - Coleman member - 'Grit with paraconglomerate lenses and channels at or near the base of the unit; interbedded with sandstones. - disconformity - OMMINIA Greywacke (alternating beds of shale and sandstone) - unconformity - Archean - Granite Pontiac group Biotite gneiss Unconformibly overlying the Archean are alternating1 beds of sandstone and shale composing the greywacke sequence. A paleocurrent direction of 190° to 200° was observed. The sandstone is fine to medium grained and medium to dark green in colour. The shale is very fine grained and dark to very dark green in colour. Granitic pebbles and cobbles are often present in the shale. Basal -. beds immediately above the unconformity often contain up to 10% clasts of granitic rock, biotite gneiss, volcanics and quartz. A. C. A. HOWE INTERNATIONAL LIMITED -6- Massive sulfides were also noted in an outcrop in Quebec along Highway 59 which contained up to 30% clasts. Radiometrically the greywacke averages 75 counts per second and magnetically it measures 0.0 cgs units. Occasionally anomalous radioactive shales were encountered up to 211 times background. Only trace uranium values were obtained. Gold values ranging from trace to .03 oz/ton (0.93 grams/ton) in the radioactive shales may indicate the presence of micro gold although no concentrating mechanisms to localize mineralization were evident during sedimentation. An erosonial disconformity exists between the greywacke and grit sequences. The disconformity and the grit sequence -- indicates a period of tectonic instability. The grit sequence overlying the greywacke typically consists of one millimeter sized dark angular quartz-grains supported by a very fine grained quartzose matrix. Often one -- millimeter size feldspar grains are also present. Commonly the grit contains up to 10% pebbles of granitic rock, greywacke and meta- volcanics. Colour of the rock type is dark green. Radiometric readings obtained over this rock type range from 55 to 80 counts per second.

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