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File Created: 24-Jul-1991 by John L. Gravel (JLG)
Last Edit:  21-Mar-2013 by George Owsiacki (GO)

Summary Help Help

NMI
Name WEST, ROK Mining Division Liard
BCGS Map 104H071
Status Showing NTS Map 104H13W
Latitude 057º 47' 23'' UTM 09 (NAD 83)
Longitude 129º 53' 18'' Northing 6405646
Easting 447185
Commodities Copper, Gold, Silver Deposit Types I05 : Polymetallic veins Ag-Pb-Zn+/-Au
L03 : Alkalic porphyry Cu-Au
Tectonic Belt Intermontane Terrane Stikine, Plutonic Rocks
Capsule Geology

The West showing lies approximately 1.2 kilometres southwest of the MFJ prospect (104H 001) and 8.0 kilometres southeast of the village of Iskut. The showing is located in the high rolling terrain of the Tanzilla Plateau. Refer to the MFJ prospect for local work history, and updated regional and local geology.

The West showing comprises several mineralized quartz vein systems within a 400 by 10 metre zone along the faulted western margin of a monzonite dike. The dike, possibly related to the Early Jurassic Rose and Edon plutons (Geological Survey of Canada Open File 1080), intrudes Lower Jurassic fragmental feldspar porphyritic andesite of the Lower Jurassic Hazelton Group (Open File 1997-3). The monzonite dike and surrounding volcanics have been intensely brecciated and healed by quartz with minor calcite. Potassic and propylitic alteration comprising K-feldspar, chlorite, epidote and pyrite surround the vein systems. Mineralization consisting of fine grained disseminations and stringers of chalcopyrite, bornite and pyrite, with associated magnetite, occur within a fine network of grey-blue quartz veins.

Three hand-dug trenches have tested the showing and a grab sample assayed 1.9 per cent copper, 15.6 grams per tonne silver and 0.04 gram per tonne gold (Assessment Report 17316).

In 2005, a helicopter-borne geophysical survey was carried out on behalf of Firesteel Resources Inc. on the Rok property. The survey comprised a new tri-directional magnetic gradiometer system, and a gamma ray spectrometer system. The airborne survey was flown at 200 metre line spacings with a total survey coverage of 611.4 line kilometres.

Bibliography
EMPR AR 1929-116; 1931-52; 1932-61
EMPR ASS RPT 3128, 6093, 6511, 7375, 7517, 8481, *17316, 28283
EMPR FIELDWORK 1976, pp. 71-73; 1994, pp. 343-358; 1995, pp. 155-174; 1996, pp. 283-290,291-297
EMPR OF 1992-1; 1992-3; 1996-4; 1997-3
EMPR BULL 1-1932
EMPR EXPL 1975-E187; 1976-E188; 1977-E229; 1979-285; 1980-479; 1982-386; 1988-C227
EMPR GEM 1971-42
GSC MAP 1957-9
GSC OF 1005; *1080; 2241

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