The Keystone property is underlain by quartzites, phyllites and schists of probable Lower Paleozoic Lardeau Group and isolated inliers of the Badshot limestone. Showings on the property consist of con- formable replacements in limestone and discordant fault controlled vein type occurrences with a quartz gangue.

The main showing is at an elevation of 2120 metres and has been exposed by trenching to reveal a band approximately 1 metre by 15 metres of replaced limestone. Mineralization consists dominantly of pyrrhotite, sphalerite, galena, pyrite and minor chalcopyrite. A one metre sample assay yielded 1.0 per cent lead, 0.25 per cent zinc, 0.27 per cent copper, 2.0 grams per tonne gold, and 17.8 grams per tonne silver (Assessment Report 6235).

A second trench, 400 metres northwest of the main showing, exposes a crosscutting mineralized quartz vein within quartz-chlorite- sericite phyllite. The vein contains coarse grained pyrite and minor sphalerite and galena.

A lead-zinc showing, 650 metres south of the main showing, occurs in limestone. A grab sample assayed 0.31 per cent lead, 0.2 per cent zinc and 6 grams per tonne silver (Assessment Report 10768). A show- ing, 700 metres northeast of the main showing, consists of a quartz vein with pyrrhotite, sphalerite and galena. A grab sample yielded 0.48 per cent lead, 0.15 per cent zinc and 26 grams per tonne silver.