The Volcanics (Killer Gossan) occurrence is located on the northeastern slope of Mount Sicker, approximately 11 kilometres north-northwest of Duncan.

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, porphyritic felsic flows and tuffs host 5 to 20 per cent pyrite with minor chalcopyrite.

Work History

In 1985 and 1986, Falconbridge Copper completed programs of geological mapping, rock sampling and an induced polarization survey on the area immediately to the south and east as the Sicker and Rocky claims. During 1987 and 1990, Minnova completed programs of geochemical sampling.

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 and 2011, Rock-Con Exploration completed programs of remote sensing, prospecting and geochemical (rock and soil) sampling on the area as part of their Volcanics property. In 2010, a rock sample (no. 3.7) assayed 0.108 per cent copper (Assessment Report 32278). The following year, a rock sample (18060) of chloritic mafic volcanics with quartz veins and possible sphalerite, located approximately 350 metres to the east of the previous years sample, assayed 0.133 per cent copper (Assessment Report 32849).