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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  22-Sep-1993 by George Owsiacki (GO)

Summary Help Help

NMI
Name AC Mining Division Revelstoke
BCGS Map 082N001
Status Showing NTS Map 082N04W
Latitude 051º 05' 56'' UTM 11 (NAD 83)
Longitude 117º 49' 13'' Northing 5661142
Easting 442564
Commodities Tungsten, Zinc Deposit Types K05 : W skarn
I05 : Polymetallic veins Ag-Pb-Zn+/-Au
Tectonic Belt Omineca Terrane Kootenay, Plutonic Rocks
Capsule Geology

The rocks of the area consist of a series of Hadrynian to Lower Cambrian and younger schists and gneisses which have been intruded by a variety of plutonic rocks (age unknown). The schists and gneisses have been folded into a large anticline which plunges moderately to the northeast. Albert Creek follows approximately the axial trace of this anticline so that equivalent rocks are found on both side of Albert Canyon.

The metamorphosed rocks belong to the Lower Cambrian and younger Lardeau Group and Hadrynian to Lower Cambrian Hamill Group. The younger Lardeau Group consists of a succession of phyllites and gneisses with minor limestone bands. The underlying Hamill Group rocks consist of quartzites, quartz mica schists and several limestone bands. Underlying the Hamill Group is hornblende-biotite- quartz-plagioclase gneiss which may represent basement rock thrust up into the overlying metasediments.

Three separate intrusions occur and comprise hornblende biotite diorite, biotite hornblende granodiorite and biotite granite.

Small lenses of skarn are developed in some limestone bands and consist of garnet, diopside and lesser amounts of epidote, quartz, calcite, actinolite and vesuvianite.

At the AC occurrence, scheelite-bearing quartz veins are found cutting through quartz mica schists and calcareous schists of the Hamill Group. The scheelite occurs as discrete grains or aggregations up to 2 centimetres in diameter at the edge of the vein. The veins also contain sphalerite, minor pyrrhotite, pyrite and tourmaline.

Bibliography
EMPR ASS RPT *3940
EMPR GEM 1972-95
EMPR PF (82N General File - Canadian Superior Exploration geochemistry maps, 82N/4E,4W, 1976)
GSC MAP 4-1961; 43-1962
GSC OF 481
GSC P 62-32

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