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File Created: 07-Mar-92 by William H. Halleran(WHH)
Last Edit:  23-Apr-92 by William H. Halleran(WHH)

Summary Help Help

NMI
Name GRAYLING Mining Division Omineca
BCGS Map 094F100
Status Showing NTS Map 094F16E
Latitude 57º 58' 26" N UTM 10 (NAD 83)
Longitude 124º 04' 39" W Northing 6426311
Easting 436265
Commodities Copper, Silver, Nickel, Cobalt, Platinum Deposit Types
Tectonic Belt Foreland Terrane Ancestral North America
Capsule Geology

The Grayling showing, exposed in Grayling Creek valley, is underlain by a Cambrian to Silurian platformal sequence of carbonates, quartzites and siltstones.

Lower Cambrian Atan Group dolomites and quartzites are conformably overlain by Cambrian to Ordovician Kechika Group arenaceous dolomites and limestones, which, in turn, are conformably overlain by Silurian Nonda Formation siltstones.

The Grayling showing consists of irregular pods of massive pyrite, bornite, chalcopyrite, pyrrhotite, minor marcasite and tetrahedrite. These pods, up to 40 centimetres thick and traceable for up to 40 metres along bedding planes, are hosted within tightly-packed sandy dolomite of the Kechika Group. Grab samples of massive sulphide material grade 1.70 per cent copper, 0.50 per cent nickel, 0.56 per cent cobalt, 27.8 grams per tonne silver, and conain anomalous platinum values (Assessment Report 19124).

Bibliography
EM GEOFILE 2000-2; 2000-5
EMPR ASS RPT *12594, *19124, *21437
EMPR GEM 1970-62; 1971-72,75
GSC OF 606
GSC P 79-1A, p. 228

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