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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  26-Mar-2018 by Karl A. Flower (KAF)

Summary Help Help

NMI
Name PILOT POINT, CRAWFORD PENINSULA, COTTAGE, ROY Mining Division Slocan
BCGS Map 082F066
Status Prospect NTS Map 082F10W
Latitude 049º 38' 11'' UTM 11 (NAD 83)
Longitude 116º 49' 28'' Northing 5498219
Easting 512676
Commodities Dolomite, Zinc, Silver, Cadmium Deposit Types R10 : Dolomite
I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Omineca Terrane Ancestral North America
Capsule Geology

The Pilot Point dolomite occurrence is located 1 kilometre north of Crystal Lake, west of Crawford Bay.

Regionally, a band of dolomite of the Lower Cambrian Badshot Formation outcrops on the east shore of Kootenay Lake, 3 kilometres northwest of Cape Horn (Pilot Point), and continues northeast for 3.5 kilometres across Crawford Peninsula to Crawford Bay. The band strikes 040 degrees and dips 70 degrees northwest on Kootenay Lake. The bed is 150 metres thick at this location.

The exposures on Kootenay Lake reveal white to yellowish-white, medium-grained dolomite with quartz veins, golden mica grains and patches of various silicates. The dolomite becomes interbedded with schistose rocks near the northern edge of the band. Numerous dykes intrude the dolomite. A sample from the northern edge of the band contained 30.32 per cent calcium oxide, 20.18 per cent magnesium oxide, 3.94 per cent silicon dioxide, 0.71 per cent aluminium oxide, 0.49 per cent iron oxide and 0.02 per cent sulphur (CANMET Report 811, p. 212, Sample 85A).

In 1973, diamond drilling on the northeast end of the band at Crawford Bay encountered mostly white to bluish-grey dolomite displaying some pink and rusty zones. A sample of cored dolomite contained 27.70 per cent calcium oxide, 16.80 per cent magnesium oxide, 14.12 per cent silicon dioxide, trace aluminium oxide, 0.52 per cent iron oxide and 39.94 per cent ignition loss (Assessment Report 4923).

In 1981, diamond drilling on the central area of the band, north west of Crystal Lake, intercepted primarily dolomite with minor sections of intrusive dikes. Drill core samples yielded from 25.9 to 29.6 per cent calcium oxide and 15.1 to 20.0 per cent magnesium oxide (Assessment Report 10247).

In 1998, diamond drilling (DDH S98-1) intercepted a 3-centimetre wide vein of sphalerite with traces of galena cut by fine calcite veins with minor pyrrhotite and trace chalcopyrite, at depth of 84.2 metres and hosted by calc-silicate rocks. A core sample of the vein assayed 47.37 per cent zinc, 0.268 per cent cadmium and 7.1 grams per tonne silver (Assessment Report 25750).

In 1973, International Marble & Stone completed two diamond drill holes, totalling 62.0 metres, on the area as the Cottage claims. In 1976, a further four diamond drill holes, totalling 146.0 metres, were completed. In 1981, four diamond drill holes, totalling 311.1 metres, were completed on the area as the Roy claims.

During 1996 through 1998, Cominco completed programs of soil sampling, ground geophysical surveys and two diamond drill holes, totalling 403.0 metres. In 2001, Klondike Gold completed three diamond drill holes, totalling 303.3 metres, and an 8.4 line-kilometre ground electromagnetic survey on the area. These exploration projects were directed towards possible massive sulphide mineralization in the area.

In 2012, Noram Ventures completed a program of geological mapping, rock sampling and seven diamond drill holes, totalling 1375.6 metres, on the area. This work was centered on graphite exploration.

Bibliography
EMPR ASS RPT *4923, 6249, *10247, 25316, *25750, 26687, 33364, 33609
EMPR EXPL 1977-249
EMPR GEM 1974-375
GSC MAP 603A
GSC MEM 228, pp. 20,21
GSC OF 929
CANMET RPT *811, Part 5, p. 212

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