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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  15-Nov-2024 by Del Ferguson (DF)

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NMI 092J15 Au20
Name SUMMIT, FRINGE BENEFIT, SHADOW OF DOUBT, GLAMOROUS GOLD, PAYMUCK, PS, TOMKEN, KEN, SNOBALL, HOG, QUINTO, Q, LMT, UMT Mining Division Lillooet
BCGS Map 092J088
Status Prospect NTS Map 092J15E
Latitude 050º 52' 23'' UTM 10 (NAD 83)
Longitude 122º 31' 39'' Northing 5635815
Easting 533245
Commodities Gold, Silver, Zinc, Lead, Copper, Antimony Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Coast Crystalline Terrane Bridge River, Cadwallader
Capsule Geology

The SUMMIT (LMT and UMT zones) prospect is located on a ridge approximately 6 kilometres northwest of the Marshall Creek’s mouth on the Carpenter Lake and 22 kilometres east of Gold Bridge, B.C.

The first report of work on the Summit was in the 1907 EMPR Annual Report, when two adits had been driven on a gold and silver vein. The area received little attention until 1944, when Bridge River Exploration discovered additional mineralized outcrops and carried out adit extensions and trenching. From 1980 to 1982, Quinto Mining Corporation carried out extensive geological mapping, geophysics and rock and soil sampling over the area. This was followed up by similar programs and trenching completed by Gold Summit Mines Ltd. from 1987 to 1995.

The area is underlain by phyllite, argillite, chert and minor recrystallized limestone and andesitic greenstone of the Mississippian to Jurassic Bridge River Complex (Group). Locally, sulphides are concentrated along the sheared contact between foliated phyllite and argillite and massive andesite.

The LMT zone, located at 1402 metres elevation, strikes northeast with a shallow dip, ranges from 10 to 50 centimetres wide along a 30 metre strike length, and is offset by numerous post-mineralization normal faults. The massive sulphides include pyrite, pyrrhotite, arsenopyrite, sphalerite and galena with minor bornite and stibnite, set in chalcedonic quartz. In 1981, an average of 7 samples from the mineralized zone yielded 7.6 grams gold per tonne, 26 grams silver per tonne and 5.54 per cent zinc (Assessment Report 10695). In 1987, grab samples of the vein from the upper adit assayed from 3.6 to 10.8 grams per tonne gold (Assessment Report 17958). In 1989, a chip sample across a mineralized vein near the end of the upper adit assayed 10.9 grams per tonne gold, 41.0 grams per tonne silver, 0.35 per cent lead and 3.4 per cent zinc over 1.7 metres (Assessment Report 19936).

The UMT zone is considered an extension of the LMT shear, at 36 metres lower elevation. In 1981, samples taken from mineralized pods in the shear zone assayed up to 4.9 grams gold per tonne, 39.8 grams silver per tonne and 8.45 per cent zinc (Assessment Report 10695). In 1987, grab samples of massive sulphides from the lower adit assayed from 8.2 to 40.6 grams per tonne gold (Assessment Report 17958).

Another mineralized area, located 30 to 40 metres south of the lower adit, consists of a 1.5- to 1.8-metre-wide shear zone, striking 110 degrees and dipping 30 degrees, hosting stringers and disseminated sulphides. In 1987, a 1.05 metre chip sample across the centre of the zone assayed 9.8 grams per tonne gold, while other chip samples from the hangingwall and footwall zones assayed up to 12.2 and 31.5 grams per tonne gold, respectively (Assessment Report 17958).

A trench, located 200 metres northwest of the adits, is reported to expose another mineralized shear zone. In 1987, a grab sample from the trench assayed 6.4 grams per tonne gold (Assessment Report 17958).

In 1989, trenching on geochemical anomalies identified at least three other zones of mineralization. The “North” anomaly zone consists of an oxidized feldspar porphyry dike hosting gold values. A 1.4- metre sample from a trench assayed 1.0 gram per tonne gold (Assessment Report 19936). The “North East” trenches yielded values up to 27.9 grams per tonne gold from a possible continuation of the vein from the main drift (Assessment Report 19936). The “Extreme South” zone contains short tensional veins which are faulted off or pinch out and are hosted by cherty argillite of the Bridge River Group. Grab samples assayed up to 25.7 grams per tonne gold (Assessment Report 19936).

In 1990, trenching exposed a mineralized quartz vein on the northeast side of the ridge. The vein strikes 075 degrees with a near vertical dip and is mineralized with pyrite, arsenopyrite, galena and sphalerite. Grab samples from the vein yielded up to 26.6 grams per tonne gold, while a 2 metre channel sample from a trench yielded 10.2 grams per tonne gold (Assessment Report 21159).

In 1994, diamond drilling on the “A” zone, located near the adits, and “F” zone, located approximately 1.2 kilometres to the east-northeast, yielded up to 88.0 grams per tonne gold with 0.80 per cent zinc over 0.75 metre and 19.3 grams per tonne gold with 2.50 per cent zinc over 0.45 metre, respectively (Assessment Report 23627).

In 2004, sampling of the Adit zone trenches yielded up to 11.77 grams per tonne gold over 1.00 metre of oxidized quartz vein material exposed in trench 7 (Sample MMR3; Moore, M. (2007-07-09): Technical Review Gold Summit Project).

In 2011, a chip sample (MMR11-01) from a trench exposing an oxidized quartz vein in argillite assayed 3.08 grams per tonne gold and 11.0 grams per tonne silver over a true width of 0.35 metre (Moore, M. (2011-09-05): Technical Review - Gold Summit Project).

Older reports on the Summit property describe a 2.5 metre basic dike crossed by arsenopyrite and pyrite- bearing quartz stringers, cutting north across quartzites, argillites and chloritic volcanics. Further up the hill are reported workings exploring an irregular 5 centimetre quartz vein containing in places 40 centimetres of solid pyrite, arsenopyrite, galena and sphalerite.

During the early 1900’s a number of tunnels or adits were reportedly driven on the property in conjunction with the nearby Marshal Creek (MINFILE 092JNE085) occurrence. In 1981 and 1982, Quinto Mining Corp. completed programs of rock and soil sampling, geological mapping and combined airborne and ground geophysical surveys on the area as the Marshall Ridge project. During 1987 through 1994, Gold Summit Mines completed programs of soil and rock sampling, trenching, geological mapping, an airborne geophysical survey and six diamond drill holes, totaling 984.0 metres, on the Summit property. During 2007 through 2009 Madman Mining Ltd. and Chi Cha Na Mining completed a technical review of the property and programs of rock and soil sampling (Assessment Report 30975). In 2010 and 2011, St. Elias Mines Ltd. and Havilah Mines Ltd. completed a program of soil and rock sampling and ground geophysical (magnetic, electromagnetic and induced polarization) surveys on the area (Assessment Report 32953).

In 2021, J.N. Bakus organized programs of remote sensing, CrowdMag ground magnetics, prospecting and minor rock sampling (Assessment Report 40071).

Bibliography
EMPR AR 1907-145; 1910-K137; 1945-A87
EMPR ASS RPT 9608, 10453, *10695, 11224, *17958, 18440, *19936, 20432, *21159, *23627, 29403, *30975, *32301, *32953, *40071
EMPR EXPL 1988-C122
EMPR FIELDWORK 1974, p. 35; 1985, pp. 303-310; 1986, pp. 23-29; 1987,
pp. 93-104; 1987, pp. 115-130; 1989, pp. 45-51, pp. 53-72; 1990,
pp. 75-83
EMPR OF 1987-11; 1988-3; 1989-4; 1990-10
EMPR PF (Prospectus, Gold Summit Mines Ltd. 1989; Property
description by B.N. Church, 1989; Sampson, C.J. (1987): Report
on Geology and Exploration Potential on Summit Claims)
GSC MAP 1882, 431A
GSC MEM 130, p. 99; 213
GSC OF 482
GSC P 43-15; 73-17
GSC SUM RPT 1912-207; 1915-83; 1932, Part A pp. 57-71
CJES 1987, Vol. 24, pp. 2279-2291
Sebert, C.F.B. (1987) Description of 22 Mineral Properties, Bridge
River Mining Camp, Unpublished B.Sc Thesis, University of British
Columbia
*Moore, M. (2007-07-09): Technical Review Gold Summit Project
*Moore, M. (2011-09-05): Technical Review - Gold Summit Project

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