The South Sarah occurrence is located near the west end of South Sarah cirque, approximately 108 kilometres northwest of the community of Germansen Landing.

The area is underlain mainly by volcanic rocks of the Upper Triassic Takla Group (Plughat Mountain Formation) which consists of andesitic flows and breccias, basalt, tuff, agglomerate, shale, conglomerate and limestone (Geological Survey of Canada Memoir 274). Dikes of intermediate composition possibly related to the Early Jurassic to Early Cretaceous Hogem Plutonic Suite are common in the area.

The volcanic rocks are propylitically altered and minor showings of chalcopyrite are common. Grab samples from quartz and carbonate veins analyzed 6.06 per cent copper, 78.4 grams per tonne silver, 1.6 grams per tonne mercury and 13.5 grams per tonne gold (Assessment Report 21521, page 47).

In 1990, Teck Explorations Ltd., in joint venture with Total Energold Corp., evaluated base and precious metal potential of the large Porphyry Creek property. Emphasis was placed on copper-gold porphyry-style mineralization. The evaluation was helicopter supported and the initial program involved contour soil sampling, prospecting and mapping over the entire claim block (252 units). Favourable geochemical response over the broadly gossanous Raven area (094C 127) located 3.3 kilometres north of the South Sarah showing, prompted construction of a 25 line kilometre grid and collection of 1005 soil samples.