The Big Sicker North (Adit No. 8) occurrence is located at an elevation of approximately 640 metres on the northeast side of Big Sicker Mountain and in the northern headwaters of a south-flowing tributary of Bonsall Creek.

Regionally, the area is located within the Cowichan uplift and is underlain mainly by andesitic to rhyolitic volcanics of the Middle to Upper Devonian McLaughlin Ridge and Myra Formations (Sicker Group). The local stratigraphy is disrupted by folding, faulting (pre-Triassic as well as Paleogene–Neogene), intrusions of gabbro and diabase sills and dikes (known as the Mount Hall gabbro) that are coeval with the Upper Triassic Karmutsen Formation (Vancouver Group).

Locally, a historical shaft and/or drift exposes schists hosting a quartz-calcite vein structure with chalcopyrite mineralization.

In 2019, a rock sample (Q029817) from the roof of the underground workings assayed 0.253 per cent copper, 2.7 grams per tonne silver and 0.90 gram per tonne gold (Assessment Report 39176).

Work History

Historical underground workings, likely dating to the early 1900s, are reported in the occurrence area. The shaft/drift have been driven for approximately 150 metres.

During 1978 through 1980, S.E.R.E.M. Limited completed programs of geological mapping, ground geophysical surveys and soil sampling on the Rocky claims.

In 1982, a three-hole drill program, totaling 107 metres, was completed for Philip Liberman on the Sicker 1-2 and Geo 1-2 claims. In 1985 and 1986, Falconbridge Copper completed programs of geological mapping, rock sampling and an induced polarization survey on the Sicker and Rocky claims. In 1987, Minnova Inc. completed 16 diamond drill holes, totalling 3217.2 metres, on the Twin property. During 1988 through 1990, Minnova completed programs of geochemical sampling and at least eight diamond drill holes, totalling 3102.5 metres, on the Mount Sicker property.

In 2008, Westridge Resources completed a 440.3 line-kilometre airborne geophysical (magnetic and electromagnetic) survey on the area as part of the Fortuna property. In 2010, Westridge Resources conducted a program of geological mapping and rock sampling on the area as the Big Sicker Mountain property.

In 2014 and 2019, Le Baron Prospecting conducted a program of prospecting and rock sampling on the area as the Mt. Sicker Copper property.