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Petrographic Study Clyde Forks Deposit

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Petrographic Study Clyde Forks Deposit 31Fe2SE9597 2.19371 LAVANT 11 010 PETROGRAPHIC S©CiJDY CLYDE PORKS DJSPOSTT LAVANT TOWNSHIP SOUTHEASTERN ONTARIO RECEIVED SEP ^-i 1987 MINING LANDS SECTION Jurate Lukoaiu.s B.Se, Geologist Thunder Bay Ontario June 1937 f.O SUMMARY - T. Sanders currently holds two mining claims located in Lavknt Township,southeatern Ontario. The main economic feature of ^the property is the presence of a small,but potentially ecohoraic Cu-Ag-Sb-Hg-Ba-(Au?) deposit. Diamond drilling to 1970 delineated a mineralized barite horizon within layered calcitic marbles. This zone has been outlined for a strike length of 400 feeft,has an average thickness of 5 feet, and has a dip extent of 600[ feet. Reserves for the deposit are 147*619 tons grading 1.32 oz.Vton Ag, 0.67# Cu, 0.37# Sb, and 0.03# Hg. Barite content of this zone is estimated at 20-75#. Available data indicates the deposit is still open-ended. The mineralogy and concordant nature of the deposit suggests an epitherraal-hot spring mode of genesis. One of the more interesting aspects of this prospect is its similarity to several gold-ant iinony-roercury-barite ocourences in the region (currently held by LAC MINERALS); and indeed its general similarity to large tonnage carbonate-hosted epithermal gold deposits in Nevada (ie. Newmont©s CARLIN Deposit). The property warrants an innovative and serious approach to ;fully evaluate the existing mineralization together with an app©raisal of potential gold mineralization. Sanders is therefore seeking joint venture partners to join in the exploration/development of this property. O K) 20 30 Km. Figure 1: Property Location Sketch 2.O INTRODUCTION The Clyde Porks Property consists of two mining claims, located in southeastern Ontario,which are wholly owned by Todd Sanders. Diamond drilling to 1970 has outlined a small,carbonate- hosted,Cu-Sb-Ag-Hg-barite deposit which contains 147.000 tons of low-grade ore. Available data suggests that this mineralized zone is still open along strike and at depth. A petrographic study of evident mineralization was initiated to provide an enhanced appraisal of the genetic and economic features of the deposit. In addition to the main deposit previous geophysical, geochemical,and diamond drilling work has indicated the presence of other sulphide and/or barite zones on the claim group. These areas have not been adequately evaluated, especially with respect to potential gold mineralization . A sample of pyritized- silicified marble,some distance from the tetrahedrite-barite zone,assayed 0.045 oz./ton Au, thus suggesting a moderate possibility of further auriferous sulphide zones on the property. Indeed,the main reason for the acquisition of the property was its mineralogical and geological similarity with several gold-pyrite-tetrahedrite prospects in the area (currently held by Lac Minerals). Also,the style and setting of the mineralization on the property is analogous to many large-tonnage,disseminated gold deposits in North America. Further work is warranted and should attempt to fully delineate the main copper-antiraony-silver deposit,and evaluate the barite content of this zone. Any future work would ideally include a comprehensive assessment of the prospect©s gold potential. Figure 2: Detailed Property Location Sketch 3.0 PROPERTY LOCATION,DESCRIPTION,and ACCESS The property is situated in the northwestern part of Lavant Township,located approximately 200 km. north of Kingston (Figure l),and consists of two mining claims numbered E.O. 718121 and 718124 which are wholly owned by T. Sanders. Access to the claims is facilitated by paved and all- w^ather roads leading north from the Town of Perth to the Village of Clyde Porks. The property is located 4km west of Clyde Porks and is readily accessible by a series of gravel and drivable bush roads (Pigure:2). 4.0 EXPLORATION and DEVELOPMENT HISTORY 1918-1919: T.Caldwell excavated several pits and trenches to expose a mineralized barite ©vein©jone carload of crude material was reportedly shipped to the U.S. 1957-1960: Lanark Silver Mines carried out soil geochemical, magnetic and self potential surveys; follow-up diamond drilling consisted of 6 holes totalling 1000 feet. 1964-1968: West Branch Explorations conducted a reconnaissance soil/stream geochemical survey over a wide area which outlined several significant mercury /copper anomalies. The company also undertook extensive diamond drilling in the vicinity of the main barite-tetrahedrite showing (30 holes for a total of 4000 feet). In 1967 a 90 foot adit with two short cross-cuts was driven into the main mineralized horizon by West Branch Explorations. 1969-1970: Carndesson Mines Limited carried out soil geochemistry and geological mapping of the property and drilled at least 24 holes for a total of 5300 feet. 1984: In January,1984 T.Sanders staked out the two claims which presently comprise the property. In February of the same year Sanders entered into a grubstake/option agreement with Lacana Mining Corporation who paid for the staking of 11 additional claims. In May and June,1984 Lacana carried out sampling of the main occurrence to evaluate its precious metal potential. Very disappointing gold-silver results and the fact that the old drill core was not available precluded any further involvement in the property by Lacana. In September Hpnestake Mineral Development Company visited the property and carried out limited sampling which did confirm the presence of significant copper-antimony-raercury-silver-barite mineralization. Table 1 1 Carndesson Mines Limited, Drill Hole Assays Hole No. Core Length Mercury Copper Antimony Silver feet percent percent percent ounces 1 9.0 .035 .38 .75 2.1 3 1.7 .05 1.32 .62 2.28 45 " 4.0 .045 1.50 - .68 1.97 6" 1.6 .046 .95 .53 1.6 2. S .02 .27 .38 1.7 7 2.5 .041 .45 .21 .53 10 14.2 .016 .50 .14 .41 12 2.8 .039 .46 .22 1.30 13 S. S .024 .61 .20 .74 1.9 .025 .30 .26 1.11 14 4.2 .02 .48 .22 1.00 16 15. ©0 .031 .57 .25 1.10 19 6.2 .05 .79 .39 2.01 20 3.0 .30 .67 .43 1.99 5.0 REGIONAL GEOLOGY The consolidated lithologies of the region are Precambrian in age and form part of the Grenville Structural Province of the Canadian Shield. In particular the Clyde Porks Area is underlain by a northeasterly-trending, linear, metasedimentary -metavolcanic belt which is characterized by a dominant NE- trending,shallowly plunging,antiformal structure (Clyde Porks Antiform) which in turn is marked by a core sequence of carbonate and clastic siliceous inetasediments (Figure:3). Metamorphism is of low amphibolite grade. 6.0 PROPERTY GEOLOGY The property is generally underlain by a layered marble sequence with relatively thin,conformable units of amphibolite (mafic raetavolcanics) and biotite-quartz-feldspar paragneisa (clastic metasediments). This entire assemblage is marked by multiple cylindrical folds- oriented 055 O ,plunging 25-35 O ifE. Several late (Tertiary ?),small-scale,granite pegmatite dykes are also evident (Figure 4). Identified faults trend NE and approximate the regional Strike. l Amphibolite 3 Paragneiss Marble Scale l" to l mile Figure:3 Regional Geology 7.Q: MINERALIZATION 7.1 General Description Identified sulphide mineralization consists mainly of high Hg-Ag tetrahedrite,pyrite,and chalcopyrite with subordinate pyrrhotite,stibnite,sphalerite,arsenopyrite,getchellite cinnabar,chalcostibnite,and molybdenite. This mineralization is fairly widespread throughout the marble assemblage,and generally consists of 1 to 2# disseminated sulphides which are mainly confined to narrow and discrete horizons. Weaker,more erratic mineralization is also evident within metavolcanics and clastic metasediments. 7*2 Main Zone Description i This zone contains 3 to 15# disseminated to coarse blebby sulphides (mainly:tetrahedrite,pyrite,chalcopyrite and stibnite) and is about 20 feet in width. This zone is marked by a central corse of higher grade mineralization which varies in thickness from 1.5 to 15 feet (5 foot average). This zone is primarily located within a folded,barite-rich,pinkish (high Mn) marble horizon which trends 320 O725-40 O . Previous diamond drilling (Table: 1) has outlined the zone for 400 feet along strike and for 600 to 700 feet down-dip. Current inferred reserves are 147,000 tons grading 0.67# copper,0.37^ antimony,0.03^ mercury,and 1.32 oz./ton silver. Barite content is estimated at 25 "to Pegmatite Biotite gneiss Amphibolite Marble Diamond drill hole-1969 pre-1969 Mineralized outcrop 4: Detailed Property Geology l 1*0© JOG VOO f 00 ft .. L (..A ^ 1S? Seal* Figure:5 Location Sketch Main Workings y/*.*© Figure:6 Adit and Main Barite Pit Sample Locations r*r A©* t ^ t* V I S .X l. * Figure:? Location Sketch Surface Workings This mineralization is exposed on surface by a series of prospect pits,stripped areas,and a short adit (figures:5, 6 and 7). In tne main prospect pit a 3.5 foot wide massive barite horizon is exposed which contains 5# disseminated to patchy tetrahedrite and pyrite. Within the adit sulphides occur as stringers and patchy aggregates usually in association with irregular masses of barite. 8.0 THIN SECTION PETROGRAPHY A polished thin section of typical mineralized barite was prepared from a sample taken from the main (barite) pit. This sample was selected as it is representitive of the deposit as a whole. ; The selected specimen consists of massive barite with 1-2,^ disseminated and nodular sulphides. d.1 Gangue Phases BARITE: (955^),medium grained,5x6mra average,anhedral crystals in a mosaic texture. Grain boundaries are usually sutured or lobate,and may be marked by granulation. Pew grains display strained extinction and polysythetic twinning. Fluid inclusions are common while mineral inclusions are very rare.
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