The Cataract showing, located to the south of Duffey Lake, occurs in a region dominated by plutonic rocks of the Coast Plutonic Complex of Jurassic to Tertiary age. In the area of the showing, the plutonic rocks, mainly quartz monzonite, are exposed within a volcanic assemblage of mainly dacite composition which are probably genetically related to the high level quartz monzonite plugs. A northeast striking shear zone cuts both volcanic and intrusive rocks of the area.

Mineralization in the area is of two types: i) molybdenite in quartz veins and veinlets in argillically altered quartz monzonite and ii) galena and sphalerite with pyrrhotite, pyrite, minor chalco- pyrite and magnetite in dacitic breccia (East Zone). Alteration minerals associated with this second type of mineralization include garnet, biotite, chlorite and minor amounts of quartz.

A 1988 drill intersection gave a best gold assay of 3.6 grams per tonne over three metres, from the East zone (Assessment Report 18185).