The Lucky Strike occurrence is located in a rock cut of the Mount Sicker narrow gauge railway, along the north western slopes of Mount Richards.

The area is underlain by volcanic rock of the Upper Devonian McLaughlin Ridge Formation, Sicker Group and by gabbroic to basaltic dykes and sills (informally known as the Mount Hall Gabbro) that are coeval with the Upper Triassic Karmutsen Formation, Vancouver Group. The deposit was reported to occur in Sicker Group rocks.

Locally, an irregular shear zone in a narrow band of quartz sericite schist and bounded on the south by a wide band of quartz feldspar porphyry is mineralized with massive lenses of pyrrhotite, chalcopyrite and sphalerite.

In 1947, the area was explored as the Lucky Strike property. Previous workings include two adits. The lower one extends for 15 metres in a south east directing with a cross cut running 8.1 metres in a north east direction. The upper tunnel is 12 metres north east of and 7.2 metres higher than the lower tunnel. It extends in a south east direction for 10 metres. A sample of dump material assayed 6.7 per cent zinc, 0.9 per cent copper with trace gold and silver (Assessment Report 19).

In 1969, Canpac Minerals explored the area as the Sirius claims. A program of geological mapping and a ground magnetic survey was completed. In 1978, the area was staked as the Croft 2 claim and a program of geological mapping and soil sampling was completed. In 1983, the area was staked as the West claims by R.J. Bilquist and a program of prospecting was completed. In 1984 and 1985, Falconbridge optioned the property and completed programs of geochemical sampling and an airborne geophysical survey. In 1987, Falconbridge completed a drilling program of 10 holes, totalling 3170.7 metres, in the vicinity of Breen Lake on the West 1 claim. In 2010, Westridge Resources completed a program of geological mapping and geochemical sampling on the Breen Lake area.