The Chal 4 is located west of Provincial Highway 19, approximately 2.2 kilometres north of Mary Lake.

The area is underlain by a very thick, gently dipping to flat-lying sequence of Upper Triassic Karmutsen Formation volcanic flows. Locally minor interflow sediments occur.

The copper-vanadium minerals occur mainly within lenses of sedimentary rock intercalated with volcanic rocks in a northwest trending shear zone at least 366 metres long. A gently dipping, twisting, pinching seam of mineralized sedimentary rocks lies within brown weathered, dark green, amygdaloidal andesite. The seam is approximately 1 metre thick at its widest point, strikes 315 degrees with a 45 degree northeast dip and consists of black tuff-argillite overlain by fossiliferous limestone. The black tuff-argillite is heavily stained yellow, green and blue after chalcocite and volborthite. Malachite, azurite and bronchantite have also been identified.

The heavily stained black tuff-argillite was analyzed with the following result: 1.8 per cent vanadium, 4.6 per cent iron, less than 0.8 per cent copper, 0.42 per cent titanium, 0.057 per cent manganese, 0.018 per cent chromium and 0.007 per cent nickel (Geological Survey of Canada Economic Geology 27, page 54). In 1989, a grab sample of chalcocite assayed 32.0 per cent copper and 1.34 per cent vanadium (Assessment Report 20072).

In 1969, Calmac Mines completed a program of rock and soil sampling on the area as the Chal claim group. In 1989, W.J. Laird prospected the area as the V 1-4 claims (Menzies Bay Group). In 2004, J.W. Laird completed a program of geological mapping on the area as the V 1-10 claims.