The Plus 40 occurrence is located on the northwest side of Rooney Lake.

The area is underlain by massive and amygdaloidal basalts of the Triassic Karmutsen Formation (Vancouver Group) near the contact with granodiorite of the Late Jurassic Island Plutonic Suite. The contact runs along the Adam River, east of the occurrence.

Locally, basalts host chalcopyrite, bornite, malachite and azurite mineralization, which have been exposed in road cuts.

Work History

In 1969, Ameda Copper Mines completed a program of soil sampling, geological mapping and a ground geophysical survey over the area immediately to the north as the CV and Plus claims. During 2006 through 2013, M. Schau completed programs of prospecting, geological mapping and rocks sampling on the area as part of the Kringle Consolidated property. In 2018, Crest Resources Inc. completed a program of prospecting, geochemical (rock and soil) sampling, trenching and a 24.0 line-kilometre ground electromagnetic survey on the area as the Red Metal Ridge property.