The Green Mountain occurrence is located on the south western flank of Gamin Mountain, overlooking Bell Creek.

The area is underlain in part by a westward younging and perhaps westerly dipping succession which includes from east to west: basaltic and diabasic flows of the Pennsylvanian Sediment-Sill Unit of the Paleozoic Sicker Group; Pennsylvanian Buttle Lake Formation bedded chert, crinoidal marble, black meta-tuffaceous or argillaceous chert; and basaltic flows of the Upper Triassic Karmutsen Formation. This succession is truncated to the west by a major body of Middle Jurassic Island Intrusions granodiorite.

Locally, massive and stringer magnetite, jasper, pyrite and marcasite occur in shears within volcanics, likely of the Devonian Nitinat Formation (Sicker Group). One tunnel has been driven on the zone for 150 metres and another, higher up the mountain, for 45 metres.

In 1982 through 1986, Imperial Metal Corp. completed programs of geochemical sampling, prospecting and a airborne geophysical survey on the Green Imperial property, immediately to the north. In 1986 and 1987, Roap Resources completed programs of geological mapping and geochemical sampling on the Sicker claims.