The Fenwick occurrence is located on a high ridge north of Fenwick Creek, approximately 8 kilometres northeast of its junction with the Palliser River.

The area is underlain by dolomitic carbonate rocks, limestone, slate, siltstone and argillite of the middle to upper Cambrian Ottertail and Chancellor formations.

Locally, banded, argillaceous dolomite; limy argillite and limestone host quartz-calcite veins with galena and lesser sphalerite-chalcopyrite mineralization.

In 1975, three samples (A-337, B-520 and B-521) of argillaceous dolomite hosting calcite veins with galena assayed 4.35, 5.40 and 6.65 per cent lead, respectively, while two samples (H-271 and H-277) of limy argillite with quartz veins hosting chalcopyrite yielded 1.17 and 0.92 per cent copper, respectively (Property File - Aquitaine Co. of Canada Ltd. [1976-02-02]: Report on Southeastern British Columbia Project 1975 for Aquitaine Company of Canada).

In 1975, Aquitaine Co. of Canada Ltd. completed a program of regional geochemical sampling, geological mapping and prospecting on the area.