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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  18-Dec-2013 by Karl A. Flower (KAF)

Summary Help Help

NMI 092K3 Cu8
Name CHAL 4, CHALCO, CORONATION, MENZIES BAY Mining Division Nanaimo
BCGS Map 092K013
Status Prospect NTS Map 092K03W
Latitude 050º 08' 01'' UTM 10 (NAD 83)
Longitude 125º 24' 55'' Northing 5556280
Easting 327393
Commodities Copper, Vanadium, Iron, Titanium Deposit Types E04 : Sediment-hosted Cu
D03 : Volcanic redbed Cu
Tectonic Belt Insular Terrane Wrangell
Capsule Geology

The Chal 4 is located west of Provincial Highway 19, approximately 2.2 kilometres north of Mary Lake.

The area is underlain by a very thick, gently dipping to flat-lying sequence of Upper Triassic Karmutsen Formation volcanic flows. Locally minor interflow sediments occur.

The copper-vanadium minerals occur mainly within lenses of sedimentary rock intercalated with volcanic rocks in a northwest trending shear zone at least 366 metres long. A gently dipping, twisting, pinching seam of mineralized sedimentary rocks lies within brown weathered, dark green, amygdaloidal andesite. The seam is approximately 1 metre thick at its widest point, strikes 315 degrees with a 45 degree northeast dip and consists of black tuff-argillite overlain by fossiliferous limestone. The black tuff-argillite is heavily stained yellow, green and blue after chalcocite and volborthite. Malachite, azurite and bronchantite have also been identified.

The heavily stained black tuff-argillite was analyzed with the following result: 1.8 per cent vanadium, 4.6 per cent iron, less than 0.8 per cent copper, 0.42 per cent titanium, 0.057 per cent manganese, 0.018 per cent chromium and 0.007 per cent nickel (Geological Survey of Canada Economic Geology 27, page 54). In 1989, a grab sample of chalcocite assayed 32.0 per cent copper and 1.34 per cent vanadium (Assessment Report 20072).

In 1969, Calmac Mines completed a program of rock and soil sampling on the area as the Chal claim group. In 1989, W.J. Laird prospected the area as the V 1-4 claims (Menzies Bay Group). In 2004, J.W. Laird completed a program of geological mapping on the area as the V 1-10 claims.

Bibliography
EMPR AR 1959-131
EMPR ASS RPT *2004, *20072, 27347
EMPR GEM 1969-211
EMPR PF (Jambor, J.L., (1957): M.Sc. Thesis; 092K - General)
GSC EC GEOL *27, pp. 53,54
GSC MAP 1386A
GSC OF 480
Hudson, R. (1997): A Field Guide to Gold, Gemstone & Mineral Sites of
British Columbia, Vol. 1: Vancouver Island, p. 172

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