The prospect occurs within the southern part of a belt of rocks known as the Buttle Lake Uplift. The belt is bounded on the east by Upper Triassic Karmutsen Formation volcanics (Vancouver Group) and on the west by the Early to Middle Jurassic Island Intrusions.

The geology of the uplift has recently undergone revision and the stratigraphy has been re-assigned to several new formations of a redefined Sicker Group and the new Buttle Lake Group (formerly the upper part of the Sicker Group), (Juras, 1987; Massey, personal communication, 1990). See the Cream occurrence (092F 220) for a summary of this revised interpretation.

The area of the occurrence was originally mapped as Upper Paleozoic Sicker Group volcanics which belong mainly the old unrevised Myra Formation of Muller (Geological Survey of Canada Paper 79-30). The rocks underlying the property generally consists of felsic to intermediate flows, tuffs and agglomerates which are overlain to the east by Buttle Lake Group, Azure Lake Formation limestone, lesser chert and argillite. Granitic to dioritic dykes, related to the Island Intrusions are numerous and mafic dykes are also present.

Four diamond drill holes were completed in 1988 on ground believed to be underlain by the same stratigraphic package as that which hosts Westmin's H-W deposit (092F 330). The drill holes intersected mainly andesite, rhyolite, and tuffaceous volcanics, with interbedded layers of volcanic greywacke, argillite and minor chert.

Mineralization encountered in the drill holes consists of three types: (1) disseminated pyrite, usually in argillaceous units, but also in other units; (2) other disseminated sulphides, usually pyrrhotite, sphalerite, chalcopyrite, and galena with pyrite in tuffs; (3) massive sulphide clasts, mostly sphalerite, chalcopyrite and pyrrhotite, in breccia tuff.

Overall, the assay results were considered low. The best intersection came from Hole No. 4 where disseminated sulphides in rhyolite assayed 14.74 grams per tonne silver, 0.35 per cent copper and 0.33 per cent zinc (Assessment Report 17641).