The CF group (C-Zone) occurrence is located on Mount Sicker, approximately 4.5 kilometres west of Westholme.

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 1.7-metre-wide quartz vein containing approximately 5 per cent chalcopyrite is hosted by gabbro with common quartz-calcite veinlets and epidote alteration.

Work History

In 1972, Duncanex Resources completed a program of prospecting, geological mapping and a 34.0 line-kilometre ground electromagnetic survey on the area, then known as the CF group. The following year, Mt. Sicker Mines Ltd. conducted an 8.0 line-kilometre induced polarization survey on the CF Group of claims.

During 1978 through 1980, S.E.R.E.M. Limited completed programs of geological mapping, ground geophysical surveys, soil sampling and two diamond drill holes, SRM 13 and 14, on an area of strong geophysical responses. The core was not assayed.

In 1986, Falconbridge Copper conducted a 23.3 line-kilometre induced polarization survey on the area as part of the Mount Sicker property. During 1987 through 1990, Minnova completed programs of geochemical sampling and at least 24 diamond drill holes, totalling 6319.7 metres, on the area as the Mount Sicker and Twin properties.

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 2014 and 2019, Le Baron Prospecting conducted programs of prospecting and rock sampling on the area immediately south as the Mt. Sicker Copper property.

In 2020, 911 Mining Co. conducted a program of prospecting and geochemical (rock and silt) sampling on the area as the Mount Sicker property. In 2021 and 2022, Scenc Resources Corp. completed a minor program of geological mapping, rock sampling, a 1.8 line-kilometre ground electromagnetic survey and four backpack drill holes, totalling 14.9 metres, on the Mount Sicker property. Later in 2022, Sasquatch Resources Corp. completed a program of prospecting, geological mapping, drillcore and rock sampling and a 418.2 line-kilometre airborne electromagnetic survey on the Mount Sicker property.