The Cow (Cow 14) occurrence is located at an elevation of approximately 450 metres, southwest of the junction of the Chemainus River and Zizac Creek and approximately 7.5 kilometres north-northeast of the community of Lake Cowichan.
Regionally, the area is underlain by chert, siliceous argillite and siliciclastic rocks of the Mississippian to Pennsylvanian Fourth Lake Formation (Buttle Lake Group), calc-alkaline volcanic rocks of the Middle to Upper Devonian Nitinat Formation (Sicker Group) and volcaniclastic rocks of the Middle to Upper Devonian Mclaughlin Ridge Formation (Sicker Group). These rocks are intruded by granodiorite and quartz diorite of the Early to Middle Jurassic Island Plutonic Suite and gabbroic to dioritic rocks of the Triassic Mount Hall Gabbro. Undivided sedimentary rocks of the Upper Cretaceous Nanaimo Group locally overlay the previous units.
Locally, the area of the main quartz-carbonate vein is underlain by pyroclastic and sedimentary rocks of the McLaughlin Ridge Formation adjacent to a gabbro dike (130 metres to the east). The rocks trend west-northwest, are tightly folded and contain 3 to 5 per cent pyrrhotite. The vein occurs in an east trending shear zone, several metres wide, in silty, sandy and lapilli tuffs. The vein, exposed along strike for 20 metres, strikes 94 to 100 degrees and dips 85 degrees south. The vein is 5 to 20 centimetres wide and is well mineralized with pyrite (2 to 10 per cent) and lesser amounts of pyrrhotite, galena and sphalerite (up to 3 per cent) and chalcopyrite.
In 1986, a sample (14024) of vein material assayed 13.03 grams per tonne gold, 29.4 grams per tonne silver, 0.550 per cent lead and 0.238 per cent zinc over 5 centimetres (Assessment Report 16097). Also at this time, diamond drilling yielded up to 0.36 and 0.26 gram per tonne gold over 0.15 and 0.10 metre, respectively, in hole CO87-2 (Assessment Report 16097).
In 2019, four rock samples (3293855 and 3293857-3293859) of vein-sulphide material yielded values from 0.05 to 0.13 per cent copper, 1.6 to 35.7 grams per tonne silver and 5.6 to 27.1 grams per tonne gold (Assessment Report 38579).
In 2024, six rock samples (181422-181425, 181430 and 181432) of vein material yielded values from 2.44 to 48.0 grams per tonne gold with up to 79 grams per tonne silver, 1.79 per cent lead, 2.01 per cent zinc and 0.15 per cent copper (Assessment Report 42177).
Along Zizac Creek, to the northeast, a cherty tuff hosts a narrow, 2- to 3-centimetre wide, sulphide-rich (pyrite-chalcopyrite-pyrrhotite) zone. In 1986, a rock sample (729) yielded 0.48 gram per tonne gold (Assessment Report 16097).
Work History
In 1964, E. M. Wilson staked the original Pogo 1-4 claims and completed a program of geological mapping, prospecting and geochemical sampling.
During 1985 through 1987, JBL Resources completed programs of geological mapping, prospecting, geochemical sampling, ground geophysical surveys and two diamond drill holes, totalling 99.5 metres, on the area as the Cow 12-16 claims.
In 2019, Kootenay Zinc Corp. conducted a program of geochemical (rock and soil) sampling on the area as the Angus Property.
In 2024, Fields of Gold Corp. conducted a program of geochemical (rock, silt and soil) sampling on the area as the C3 property.