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File Created: 09-Mar-92 by William H. Halleran(WHH)
Last Edit:  10-Apr-92 by William H. Halleran(WHH)

Summary Help Help

NMI
Name WATERFALL Mining Division Liard
BCGS Map 094F100
Status Showing NTS Map 094F16E
Latitude 57º 56' 57" N UTM 10 (NAD 83)
Longitude 124º 05' 57" W Northing 6423580
Easting 434939
Commodities Copper, Silver Deposit Types
Tectonic Belt Foreland Terrane Ancestral North America
Capsule Geology

The Waterfall showing is exposed in Grayling Creek valley, an area underlain by a 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.

Mineralization consists of disseminated and massive pyrite, with variable amounts of bornite and chalcopyrite, within a gossanous, pyritic, and brecciated quartzite of the lower Atan Group. Assays of the mineralization graded 15.2 per cent copper and 2.5 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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