The Troitsa Peak (Discovery showing) area is underlain by rocks of the Eocene Ootsa Lake Group and of the Middle to Lower Jurassic Hazelton Group.

The Discovery showing represents the first showing discovered on the Whitesail Range with epithermal characteristics. The showing occurs in a morrainal train at the foot of a small pocket glacier where veins, veinlets, stockworks of quartz and silicified zones are hosted in propylitic and argillic altered bladed feldspar porphyry and fine-grained volcanics. The textures in the quartz consist of a fine-grained, banded, cherty to finely crystalline, vugqy to coxcomb silica that has undergone repeated pulses of deposition. As there is no immediate exposure to this showing little exploration work has been done. Samples taken in 1981 gave silver values to 45 grams per tonne and gold to 0.75 gram per tonne; a grab taken during a cursory stop in 1987 gave in excess of 102.86 grams per tonne silver and anomalous gold (as reported Assessment Report 17654).

See Cummins Veins (093E 100) for details of a common area work history.