The Trident Creek placer uranium, thorium and niobium occurrence was located on the southwest shore of Kinbasket Lake and approximately 7.5 kilometres northeast of Trident Mountain. The original occurrence area has been flooded and is now under the waters of Columbia Reach, Kinbasket Lake.

Regionally, the area is underlain by rocks of the Neoproterozoic Horsethief Creek Group, consisting of crystalline limestone overlain by quartzite and underlain by metamorphosed black argillite. The rocks are isoclinally folded, striking northwest and dipping approximately 50 degrees to the southwest.

Locally, placer uranium, thorium and niobium occur in Trident Creek, possibly derived from the nepheline syenite body at the head of the creek (see MINFILE 082M 173).

In 1956, panning samples from Trident Creek are reported to have assayed 0.18 per cent niobium, 0.036 per cent tri-uranium octoxide (U3O8) and 0.15 per cent thorium dioxide (ThO2; Property File - Russel, F.T. (1956): Report on #223 Prospecting, 1956).