The Jill occurrence is located on the southern side of Mount Jack, at approximately 500 metres in elevation and over looking Golledge Creek.

The area is underlain by a small stock, probably related to the Eocene Sooke Gabbro, exhibiting porphyritic soda feldspars with a gabbro fringe zone, which intrudes basalt of the coeval Metchosin Igneous Complex.

Chalcopyrite, some bornite, malachite, minor pyrite and pyrrhotite occur in veinlets and as disseminations in the basalt. The mineralization is associated with shears that formed tangentially to the stock.

In 1973 and 1974, Leech River Mines completed programs of geochemical sampling, geological mapping and ground geophysical surveys on the area as the Jill claim.