The occurrence is within the Monashee Complex on the eastern margin of the Shuswap Metamorphic Complex. It lies on the south- eastern limb of the Mount Grace syncline, on the northwestern edge of Frenchman Cap Dome. Host rock is a coarsely crystalline marble within a calc-silicate gneiss, marble, gneiss succession that overlies dominantly orthogneiss in the core of the dome. The age of the host succession is not known but is probably late Proterozoic or early Paleozoic.

The occurrence is comprised of a 15 to 20 centimetre thick interval of minor chalcopyrite and magnetite, associated with hornblende.

In 2011, TriGold Resources Inc. completed a program geochemical (rock and soil) sampling and an airborne geophysical survey on the area as the Copper King-Cotton Belt property.