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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  10-Apr-1991 by Garry J. Payie (GJP)

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Name GOPHER (L.1050), ROSSLAND Mining Division Trail Creek
BCGS Map 082F002
Status Prospect NTS Map 082F04W
Latitude 049º 03' 45'' UTM 11 (NAD 83)
Longitude 117º 47' 41'' Northing 5434708
Easting 441945
Commodities Gold, Silver, Copper, Zinc, Bismuth Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Omineca Terrane Quesnel, Plutonic Rocks
Capsule Geology

The Gopher showing is hosted by the augite porphyry (diorite) of the Rossland sill. The sill itself has intruded volcanic conglomer- ate, breccia, and sandstone of the Elise Formation, Rossland Group. The contact of the sill is poorly defined but appears concordant. The Rossland Group rocks are intruded by the Lower Jurassic Rossland monzonite which is comprised of a biotite-hornblende-augite monzonite stock. The showing lies within the zone of thermal metamorphism associated with the monzonite intrusive.

The mineralized vein lies east of the main fault on the Home- stake claim (082FSW123) and, in part, is a continuation of the east Homestake vein system. Mineralization consists of pyrrhotite, pyrite, chalcopyrite, sphalerite and minor arsenopyrite in quartz- calcite gangue. Equidimensional pyrite grains occur as islands in the pyrrhotite. Native bismuth and associated bismuthinite were also reported to occur in the ore. Chip samples taken across 1 metre at the Gopher adit assayed from 8.37 to 10.35 grams per tonne gold and 12.34 to 30.17 grams per tonne silver (Assessment Report 16751).

EMPR AR 1896-17,30; 1897-537,543,571; 1905-172; 1949-158
EMPR BULL 24, *74; 109
EMPR FIELDWORK 1987, pp. 19-30; 1988, pp. 33-43; 1989, pp. 11-27; 1990, pp. 9-31
EMPR OF 1988-1; 1989-11; 1990-8; 1990-9; 1991-2; 1991-16
EMPR PF (Westoll, N.G. and Associates: Geology Report on the Rossland Property, British Columbia, Aug.18, 1987 in Prospectus for Antelope Resources Limited, effective date Mar.10, 1988)
GSC MAP 1004; 1504A; 1518
GSC MEM 77, p. 165
GSC P 79-26
EC GEOL Vol.68, 1973, pp. 1337-1346
PERS COMM Andrew, K.P.E., March 1991
*Thorpe, R.I. (1967): Controls of Hypogene Sulphide Zoning, Rossland, British Columbia, Ph.D. Thesis, University of Wisconsin