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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  13-Dec-1991 by Peter S. Fischl (PSF)

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Name NO. 18 (L.3288), MILL ZONE Mining Division Similkameen
BCGS Map 092H038
Status Showing NTS Map 092H07E
Latitude 049º 20' 12'' UTM 10 (NAD 83)
Longitude 120º 30' 36'' Northing 5467865
Easting 680886
Commodities Copper, Gold, Silver Deposit Types L03 : Alkalic porphyry Cu-Au
Tectonic Belt Intermontane Terrane Quesnel
Capsule Geology

The No. 18 showing is located 450 metres west of Wolfe Creek and 13.5 kilometres south of Princeton.

The area is underlain by the eastern facies of the Upper Triassic Nicola Group, comprising mafic augite and hornblende porphyritic pyroclastics and flows. These rocks are intruded by diorite and monzonite, locally pyroxenite and gabbro, of the Early Jurassic Copper Mountain and Lost Horse intrusions.

The showing is underlain by massive and fragmental andesite of the Nicola Group. The Nicola Group volcanics were previously included with the Wolf Creek Formation (Geological Survey of Canada Memoir 171). These rocks commonly contain pegmatite veins, and are intruded by several large, north-striking, post-Early Cretaceous quartz feldspar porphyritic felsite dykes ("Mine Dykes"), and smaller andesitic dykes.

The andesite is irregularly mineralized with chalcopyrite and pyrite in two tunnels, totalling 150 metres in length. Patchy copper mineralization is also exposed in nearby trenches. The sulphides are associated with orthoclase, epidote, zoisite and sericite. The richer areas of mineralization are estimated not to contain more than 1 per cent copper (Geological Survey of Canada Memoir 171, page 37). Gold and silver values are reported to be associated with this mineralization (Minister of Mines Annual Report 1908, page 128).

This showing was initially explored some time between 1906 and 1934. Cumont Mines Ltd. carried out trenching, percussion drilling and soil and geophysical surveys in 1968 and 1969. Nufort Resources Inc. (formerly Cumont Mines) conducted 440 metres of trenching in 1977. Newmont Exploration of Canada Ltd. completed soil and magnetometer surveys over the showing in 1987. The deposit was most recently drilled in 1990 by Similco Mines Ltd., operator of the nearby Similco (Copper Mountain) mine (092HSE001) to the south.

EMPR AR 1906-255; 1908-128; 1968-207
EMPR ASS RPT 1985B 1987A 1987B 16745, 17462
EMPR BULL *59, pp. 75,76
EMPR EXPL 1977-E126
EMPR GEM 1969-353
GSC BULL 239, pp. 140,141
GSC MAP 300A; 888A; 889A; 1386A; 41-1989
GSC MEM *171, p. 37; 243, pp. 87,88
GSC P 85-1A, pp. 349-358
GSC RPT 986 (1908)
GSC SUM RPT 1906, pp. 51,52
CIM BULL Vol. 44, No. 469, pp. 317-324 (1951); Vol. 61, No. 673, pp. 633-636 (1968)
CIM Trans. Vol. 18, pp. 192-201 (1915)
CJES Vol. 24, pp. 2521-2536 (1987)
GCNL May, 1969; #148, 1990
Montgomery, J.H. (1967): Petrology, Structure and Origin of the Copper Mountain Intrusions near Princeton, British Columbia; unpublished Ph.D. thesis, University of British Columbia
EMPR PFD 676921