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 regionally metamorphosed 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 consists of magnetite and minor chalcopyrite, marked by conspicuous malachite staining, in a very rusted zone 20 centimetres thick. A small pit indicates previous exploration of the zone.

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.