The Sterling showing occurs on a ridgecrest underlain by a pendant of Devonian to Permian plagioclase porphyritic volcanic flows of the Stikine Assemblage within a stock of Eocene granite of the Major Hart Plutonic Suite. Plagiogclase and minor hornblende porphyry dikes cut the above rocks and range from 30 to 120 centimetres in thickness. These generally strike 065 degrees dipping 40 degrees to the southwest.

Mineralization and alteration is reported to be either related to contact zones or to a set of parallel fault zones striking northwest. Contacts between volcanics and intrusive rocks are heavily chloritic and well sheared with small quartz veins filling fractures. Rock sample STE/90 R10, collected from a contact zone, graded 0.12 per cent copper and 2.2 grams per tonne silver (Assessment Report 20892).

The 1990 work program Goldbelt Mines Inc. consisted of geological mapping, prospecting, rock, silt and soil sampling covering portions of each of the five Sterling claims. Several rock and soil samples assayed returned elevated values in copper, silver, barium and zinc. Combined with the regional geology, an area of interest was delineated. During the program 18 rock, 46 silt and 62 soil samples were collected.