The Heather claim is underlain by Lower Jurassic Hazelton Group volcanics comprised of andesite, tuff and flow breccia. At an elevation of 1638 metres, an open cut exposed mineralized veinlets in a shear striking 320 degrees and dipping 48 degrees southwest. The veinlets consist of sphalerite and arsenopyrite.

Mineralization occurs over an 84 centimetre width of the shear, and in 1931, a sample taken across this assayed 0.42 grams per tonne gold, 17.14 grams per tonne silver, and 3.4 per cent zinc (Minister of Mines Annual Report 1931, page 73).