The RM property is located adjacent to Green Lake near the village of Whistler on Highway 99. Adjacent to the highway, outcrops of pyritic metasedimentary and metavolcanic rocks of the Lower Cretaceous Gambier Group are preserved as a roof pendant within granodiorite of the Jurassic to Tertiary Coast Plutonic Complex. The Gambier rocks consists of andesitic tuff, siltstone and shale, regionally metamorphosed to greenschist facies.

Mineralization consists of pyrite as disseminations and fracture fillings with minor amounts of chalcopyrite. Hydrothermal alteration of the Gambier rocks is dominantly sericitic and siliceous, overprinting an earlier propylitic assemblage of chlorite and epidote.

A 60-centimetre chip sample taken across a chalcopyrite-rich zone contained 1.5 per cent copper (Assessment Report 3947).