The area lies within the Shuswap Metamorphic Complex along the northwest margin of the Frenchman Cap Dome. The core of the Dome is composed of a mixed paragneiss and orthogneiss succession of probable Aphebian age.

The molybdenum occurs at the closure of a small fold or limb in a quartz-syenite orthogneiss layer that is part of a para- gneiss sequence within the northwest limb of the Mount Grace Syncline. The syenite measures about 1300 by 200 metres.

The original molybdenum occurrence lies 1 kilometre to the west, down section from the larger occurrence in a hornblend- rich gneiss. The mineralized zone measures about 4 square metres and an assay returned 0.65 per cent molybdenite (Johnson, 1980).