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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  11-Jul-2020 by Karl A. Flower (KAF)

Summary Help Help

NMI 104B10 Cu1
BCGS Map 104B057
Status Showing NTS Map 104B10W
Latitude 056º 31' 54'' UTM 09 (NAD 83)
Longitude 130º 47' 25'' Northing 6266690
Easting 389889
Commodities Copper, Lead, Zinc, Gold, Silver Deposit Types L04 : Porphyry Cu +/- Mo +/- Au
I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The Pins East occurrence is located in northwest British Columbia, approximately 82 kilometres northwest of Stewart, in an area termed the Bronson Corridor.

The Pins East showing is located within an undivided Jurassic-Triassic volcanic and sedimentary sequence which may, in part, be correlative with the Hazelton Group (Unuk River Formation) or Stuhini Group rocks. The volcanic units consist of rhyolite-latites, andesites and an intensely altered rock hosting abundant chlorite, epidote and pyrite. Argillites and andesitic tuffs were also mapped. The rhyolite occurs as flows and sills, is strongly fractured and hosts abundant pyrite, both disseminated and in veinlets accompanied by sericite. Limonite staining is common and masks the rock fabric.

The volcanic and sedimentary sequences are intruded by Upper Mesozoic to Cenozoic intrusives of the Coast Plutonic Complex. The intrusive units consist of diorite porphyry, orthoclase porphyry and andesitic porphyry.

Copper mineralization, consisting of fine-disseminated specks and coarser blebs or veinlets of chalcopyrite with pyrite and limonite, occurs within a chlorite-sericite altered andesite. The adjacent rock type is andesitic tuff which is also strongly altered by chlorite and pyrite. Quartz veins contain mainly chlorite and pyrite with minor amounts of chalcopyrite, galena and sphalerite. Minor specks of galena and sphalerite were found disseminated within the altered andesite and tuff.

Silicification is more intense in the eastern part of the Pins grid, and the altered andesite hosts abundant quartz veins and vein- lets.

In 1973, several rock samples were collected from quartz veining in the eastern part of the property. One chip sample assayed 0.0135 per cent zinc, 0.003 per cent lead and 0.0024 per cent copper.

In 1983, a float sample taken from the North Pins Glacier float train assayed 0.96 gram per tonne gold, 565.7 grams per tonne silver, 1.92 per cent lead, 5.87 per cent zinc and 0.058 per cent copper (Assessment Report 11332, part 1).

The Pins Central zone hosts quartz-pyrite-chalcopyrite veins and disseminations which are associated with patchy local silicification and propylitic alteration, and may contain traces of magnetite. They appear to be small, fracture controlled mineralized zones associated with contacts of small intrusives.

See Pins (104B 111) for details of common work history.

In 2014, Colorado Resources Ltd. explored the Pins East area as part of the larger KSP project. Rock sampling over an 8 square kilometre area around Pins East and Pins continued to report elevated amounts of precious and base metals. Float sample 1724066, taken from a piece of gossanous quartz breccia below a cliff southwest of the Pins East showing, reported 88.2 grams per tonne gold, 43.9 grams per tonne silver, and 3.6 per cent copper (Assessment Report 35184). Soil sampling around Pins East also reported anomalous levels of copper and zinc.

In 2015, Colorado Resources conducted a limited program of soil and rock sampling, and a ground magnetometer survey at Pins East. The geophysical survey identified a northeast trending feature of high magnetic intensity approximately 350 by at least 150 metres in area. Rock sample 2637292 reported 4.85 grams per tonne gold, 9.29 grams per tonne silver, and 0.36 per cent copper (Assessment Report 35943).

EMPR EXPL 1983-526; 1986-C443
EMPR FIELDWORK 2015-1 pp. 41-58
EMPR GEM 1972-517; 1973-500; 1974-335
EMPR GM 1997-03
EMPR OF 1989-10; 1990-16; 1994-1
EMPR PF (Graf, C.W., (1982): Report on Claims in Snippaker Creek area of British Columbia for Active Mineral Explorations Ltd., December 1982; Peterson, D.B., (1987): Report on Gossan Gold Project, Liard Mining Division, Northwestern British Columbia, for Western Canadian Mining Corporation, November 1987)
EMR MP CORPFILE (Silver Standard Mines Ltd., Cobre Exploration Ltd.)
GSC MAP 9-1957; 311A; 1418A
GSC P 89-1E, pp. 145-154
Anderson, R.G. (1988): A Paleozoic and Mesozoic Stratigraphic and Plutonic Framework for the Iskut Map area (104B), Northwestern British Columbia, pp. A1-A5, in Geology and Metallogeny of Northwestern British Columbia, Smithers Exploration Group, G.A.C. Cordilleran Section Workshop, October 16-19, 1988
Chevron File
Equity Preservation Corp. Stewart-Sulphurets-Iskut Compilation, Dec. 1988 (Showing No. B28)
Cavey, G. (2008-11-14): Technical Report on the Iskut Project
EMPR PFD 903963, 19324, 841824