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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  09-Jun-1988 by Laura L. Duffett (LLD)

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NMI 093L14 Cu1
Name LAST CHANCE (L.7255) Mining Division Omineca
BCGS Map 093L084
Status Prospect NTS Map 093L14W
Latitude 054º 50' 54'' UTM 09 (NAD 83)
Longitude 127º 22' 00'' Northing 6079137
Easting 604871
Commodities Copper, Silver Deposit Types L01 : Subvolcanic Cu-Ag-Au (As-Sb)
Tectonic Belt Intermontane Terrane Stikine
Capsule Geology

The property is underlain by Middle to Lower Jurassic Hazelton Group volcanics consisting mainly of andesite and tuff.

Several small and irregular sulphide veins within the andesite were prospected by open cuts. Vein mineralization is comprised of magnetite, considerable pyrite, and minor amounts of chalcopyrite. Three sulphide veins occupy fractures that strike from 055 to 070 degrees west and dip steeply north. The three veins terminate against small cross faults and the andesite wallrock is altered but is sparsely mineralized.

Another mineralized vein strikes 305 degrees and dips 83 degrees northeast. It is comprised of massive magnetite and pyrite and is cut by small chalcopyrite stringers. A selected sample collected by D. Lay in 1926 assayed trace gold, 68.6 grams per tonne silver, and 2.5 per cent copper. A representative sample from the dump assayed 0.7 grams per tonne gold, 3.09 grams per tonne silver, 3.75 per cent copper, and 0.16 per cent zinc (Geological Survey of Canada Memoir 223, page 64). An adit driven 20 degrees east from the vein failed to disclose any mineralization.

Bibliography
GSC MEM *223, p. 64
GSC SUM RPT 1925A, p. 142
EMPR AR 1917-114; 1918-118; *1926-131; 1941-43
GSC P 36-20, pp. 77-91; 44-23
GSC MAP 971A
EMPR MAP 69-1
W MINER June 1964, #6, p. 24
EMPR EXPL 1977-E198
GSC OF 351
GSC BULL 270
EMPR FIELDWORK 1988, pp. 195-208
Kirkham, R.V., (1969): A Mineralogical and Geochemical Study of the Zonal Distribution of Ores in the Hudson Bay Range, British Columbia, Ph.D. Thesis, University of Wisconsin

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