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File Created: 24-Jul-1985 by BC Geological Survey (BCGS)
Last Edit:  14-Dec-1995 by Gilles J. Arseneau (GJA)

Summary Help Help

NMI
Name PERTH (L.8794), PYRITE (L.8793), COPPER CLIFF Mining Division Slocan
BCGS Map 082K015
Status Prospect NTS Map 082K03E
Latitude 050º 09' 43'' UTM 11 (NAD 83)
Longitude 117º 10' 42'' Northing 5556652
Easting 487262
Commodities Copper, Zinc, Lead, Silver, Gold Deposit Types G06 : Noranda/Kuroko massive sulphide Cu-Pb-Zn
Tectonic Belt Omineca Terrane Kootenay
Capsule Geology

The Perth occurrence is situated near the headwaters of Copper Creek, on Reverted Crown grant Lot 8794 at 1533 metres elevation above sea level, in the Slocan Mining Division. The property also includes the Pyrite Reverted Crown grant (Lot 8793). Regionally, the area lies within the Selkirk Mountains of southeastern British Columbia. The occurrence is within the Kootenay Arc, a curving belt of highly deformed metasedimentary and metavolcanic rocks which includes the Upper Proterozoic to Lower Cambrian Hamill Group, the Lower Cambrian Badshot Formation, the Permian to Carboniferous Kaslo Group and the Paleozoic Lardeau and Milford groups. The volcano-sedimentary sequence is intruded by numerous Paleozoic to Mesozoic granitoid plutons.

The property is underlain by andesitic volcanic rocks and intermediate to mafic intrusive rocks of the Kaslo Group that generally strike northwest and dip west. Limestone, argillite and chert of the Milford Group are exposed east of the property. Further east, overlying the Kaslo Group are the sedimentary rocks of the Upper Triassic Slocan Group.

The occurrence consists of bands of massive to semimassive sulphide mineralization enclosed within a strongly silicified, sericitized and chloritized tuffaceous andesite. The sulphide body varies from a few centimetres up to 2 metres in width and extends discontinuously for about 150 metres. The massive sulphide body comprises pyrrhotite, pyrite, chalcopyrite, sphalerite and minor galena. A weighted average of chip samples of the mineralization at surface assayed 3.1 per cent copper, 1.22 per cent zinc, 23 grams per tonne silver and 1.5 grams per tonne gold over an average width of 0.6 metre (Assessment Report 9697).

Two short adits were driven to explore the potential of the massive sulphide body. The upper adit intersected a 2 metre wide sulphide body while the lower adit failed to reach the mineralization. Diamond drilling in 1981 failed to identify a lateral or vertical continuity to the surface mineralization (Assessment Report 9697).

Bibliography
EMPR AR 1907-96; 1908-250
EMPR ASS RPT 5636, 6051, 8019, *9697
EMPR GEM 1975-E45; 1976-E46
EMPR OF 1999-2
GSC BULL 193
GSC MAP 235A; 1277A
GSC MEM 161
GSC OF 432; 464
GSC SUM RPT 1908, pp. 86-87

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