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File Created: 09-Dec-1985 by Allan Wilcox (AFW)
Last Edit:  18-Sep-1990 by Dorthe E. Jakobsen (DEJ)

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NMI
Name HEATHER, CAROL S, CAROL, TANIA, TANIA S, LUCIA Mining Division Nanaimo
BCGS Map 092C098
Status Showing NTS Map 092C15E, 092C16W
Latitude 048º 58' 19'' UTM 10 (NAD 83)
Longitude 124º 29' 16'' Northing 5425404
Easting 391121
Commodities Copper, Gold Deposit Types I06 : Cu+/-Ag quartz veins
Tectonic Belt Insular Terrane Wrangell
Capsule Geology

The Heather showing is located 40 kilometres southwest of Nanaimo and 7 kilometres north of Cowichan Lake.

The area is within the Cowichan uplift and is underlain by Paleozoic Sicker Group rocks. These, in the area of the showing, conmprise northwest trending volcanic and volcaniclastic rocks of the Upper Devonian McLaughlin Ridge and Devonian Nitinat formations. Intrusions of the Early to Middle Jurassic Island Plutonic Suite also occur in the area.

The main showing, on the Carol S claim, was discovered by trenching in 1982 and comprises quartz-carbonate veining containing disseminated pyrite and minor chalcopyrite. The mineralization occurs in a northwest striking, 50 to 60 degree south dipping, shear zone (bounded by faults) hosted in andesitic tuffs in the central part of a large antiform. Alteration consists of ankerite, clay, chlorite and sericite in the immediate vicinity of the mineraliza- tion. The shear zone extends for 3 kilometres onto the Tania S and Tania S3 claims. Surface grab samples of the shear zone assayed 8.57 grams per tonne gold and 0.18 per cent copper (Assessment Report 13516). Drilling in 1984 encountered intensely sheared green tuff and minor cherty sections. The best intersection was 3 grams per tonne gold over 1.5 metres and occurred in the upper contact area of a cherty and hematized section (Assessment Report 13516). Mineraliz- ation appears to decrease with depth. Drilling in 1987 confirmed the orientation of the shear zone but the results were poor. Wide zones of altered andesitic tuff with low gold values are present at shallow levels, less than 50 metres, but at greater depths these zones thin.

The McDougall (092C 134) vein occurs on the Heather property approximately 1.7 kilometres to the north of the main showing.

Bibliography
EMPR ASS RPT *11303, 11346, *12445, *13516, 15206, 16357, 16805, 17833, 17835, 18521
EMPR BULL 37
EMPR FIELDWORK 1986, pp. 223-229; 1987, pp. 81-91; 1989, pp. 503-510
EMPR MP MAP 1992-2
EMPR OF 1987-2; 1988-24; RGS 24, 1990
EMPR PF (In General File: B.C. Forest Products Road Map, Cowichan Lake Area, 1963)
GSC MAP 1386A
GSC MEM 13
GSC OF 463; 821; 1272
GSC P 72-44; 76-1A; 79-30
WIN Jan. 1987
Carson, D.J.T. (1968): Metallogenic study of Vancouver Island with emphasis on the relationships of mineral deposits to plutonic rocks, Ph.D. Thesis, Carleton University
Chevron File
Falconbridge File
Falconbridge File

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