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File Created: 09-Mar-1992 by William H. Halleran (WHH)
Last Edit:  12-Apr-1992 by William H. Halleran (WHH)

Summary Help Help

NMI
Name ATAN COPPER Mining Division Liard
BCGS Map 094F100
Status Showing NTS Map 094F16E
Latitude 057º 56' 57'' UTM 10 (NAD 83)
Longitude 124º 05' 14'' Northing 6423568
Easting 435646
Commodities Copper, Silver Deposit Types I06 : Cu+/-Ag quartz veins
Tectonic Belt Foreland Terrane Ancestral North America
Capsule Geology

The Atan Copper showing is exposed in a tributary valley on the east side of Grayling Creek. The valley is underlain by Cambrian to Silurian platformal sequence of carbonates, quartzites and siltstones. Lower Cambrian Atan Group dolomites and quartzites, intruded by mafic dykes, are conformably overlain by Cambrian to Ordovician Kechika Group arenaceous dolomites and limestones and Silurian Nonda Formation siltstones.

A coarse crystalline chalcopyrite, malachite, and azurite vein is hosted within a dolomite, believed to belong to the lower Atan Group. A grab sample of this material graded 11.52 per cent copper and 27.8 grams per tonne silver (Assessment Report 21437).

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

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