The Troy occurrence is located south of Ashlu Creek, approximately 6.2 kilometres north west of the creek mouth on the Squamish River.

The area is underlain by granodiorite and quartz diorite of the Jurassic Cloudburst pluton of the Coast Plutonic Complex (Geological Survey of Canada Paper 90-1F). A major northwest trending shear zone of Cretaceous age, the Ashlu Creek shear zone, cuts the country rock.

In 1985, four diamond-drill holes were drilled to investigate the contact between metadiorite and underlying quartz diorite. The contact was observed on the surface about 40 metres upslope to the southwest of the drill collars, and is marked by closely spaced limonite-coated fractures with minor quartz veins. The zone appears to strike northwest and, as indicated by drill results, is steeply dipping.

No significant mineralization was noted within any of the core. One fractured and oxidized zone at 21 metres depth was sampled over 0.3 metres and assayed 0.93 grams per tonne gold (Assessment Report 13873).