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).