The Harris occurrence is located on the north eastern slope of Mount Bolduc, south of the Harris River in its northern head waters.

The area is underlain by a series of basaltic flows and related pyroclastics of the Karmutsen Formation and is overlain by, or interbedded with, limestone of the Quatsino Formation; both units belong to the Upper Triassic Vancouver Group. Andesite to rhyolite tuffs and breccias, with minor intercalated greywacke and argillite, of the Lower Jurassic Bonanza Group overlie the Upper Triassic rocks. Intruding this stratigraphic assemblage is the Early to Middle Jurassic Island Plutonic Suite of monzonite to diorite composition.

Magnetite with chalcopyrite occurs at the contact of a granitic intrusion and limestone. Andesite is reported to underlie the limestone.

In 1971, Lucky Strike Mines completed a program of geological mapping, soil sampling and a ground magnetometer survey on the CW and LG claims. In 1980, Union Miniere Exploration and Mining completed a ground magnetometer survey on the Bolduc claim.