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File Created: 11-Apr-1991 by Garry J. Payie (GJP)
Last Edit:  11-Apr-1991 by Garry J. Payie (GJP)

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Name NORTH, GOPHER (L.1050), MAID OF ERIN (L.1293), ROSSLAND Mining Division Trail Creek
BCGS Map 082F002
Status Prospect NTS Map 082F04W
Latitude 049º 03' 44'' UTM 11 (NAD 83)
Longitude 117º 47' 30'' Northing 5434675
Easting 442168
Commodities Gold, Silver, Copper, Zinc Deposit Types L01 : Subvolcanic Cu-Ag-Au (As-Sb)
I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Omineca Terrane Quesnel
Capsule Geology

The North shear zone occurs between the Homestake-Gopher and Bluebird-Mayflower shear zones. The shear occurs mainly in the southeast portion of the Gopher Crown Grant, and continues northwest through the Maid of Erin Crown Grant to the Robert E. Lee Crown Grant where the Robert E. Lee/Maid of Erin (082FSW131) occurrence is located (Assessment Report 16751, page 23, Figure 5, Map 2).

The North prospect occurs in green volcanic conglomerate, breccia and sandstone of the Lower Jurassic Elise Formation, Rossland Group. The Rossland Group rocks are intruded within a few hundred metres to the north by the Early Jurassic Rossland monzonite which is a stock comprised of a biotite-hornblende-augite monzonite. The deposit occurs in a shear zone that strikes approximately 070 degrees, dips either vertically or steeply to the southeast, and is traceable for 400 metres. The shear zone appears to be cut off to the west by the Gopher Creek fault. The structure is continuous to the northeast as far as the Robert E. Lee/Maid of Erin occurrence (082FSW131) and possibly beyond.

The mineralization consist of pyrrhotite, chalcopyrite, arseno- pyrite, pyrite and sulphosalts. Two hundred metres to the northeast sphalerite appears as part of the mineral assemblage. The form of mineralization varies from disseminations and veinlets in the volc- anics to massive sections up to 1 metre wide. The sulphides are usually accompanied by silicification.

Chip samples across 1 metre intervals taken from trenches across the structure gave values averaging 12.17 grams per tonne gold and 33.25 grams per tonne silver (Assessment Report 16751, page 23). Six diamond-drill holes tested this zone in 1985/1986 with the best intersection grading 22.77 grams per tonne gold and 31.20 grams per tonne silver (Assessment Report 16751, page 23).

EMPR ASS RPT *16751, 19601
EMPR BULL 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.D. and Associates: Geological Report on the Rossland Property in British Columbia, Aug.18, 1987, in Prospectus for Antelope Resources Limited, effective date Mar.10, 1988 (in Homestake file - 082FSW123); Filing Statement, Antelope Resources Inc., Feb. 3, 1989 (in 082FSW123 file))
GSC MAP 1004; 1504A; 1518
GSC OF 1195
GSC P 79-26
GCNL #147, 1988; #10, 1991
Thorpe, R.I. (1967): Controls of Hypogene Sulphide Zoning, Rossland, British Columbia, Ph.D. Thesis, University of Wisconsin