The area is underlain by pre-Triassic felsic and mafic phyllites and intercalated limestone, dolomite and greenstone of the Stikine Terrane. These are cut and bounded by north-east trending faults.
Silicification within the Upper Carboniferous felsic phyllite is bounded by conjugate sets of faults. It also masks foliation within the phyllite and is controlled by bedding within the limestone and dolomite to form lens-shaped alteration zones up to 10 metres long. Iron carbonate alteration is common throughout the fault bounded package.
Quartz veins and fractures are common in the dolomite and phyllite units and contain tetrahedrite, malachite, azurite, pyrite, K-spar, hematite, and tourmaline.
A 1.0 metre chip sample from Trench 2 contained 58.9 grams per tonne silver and a subcrop sample of a chalcedony vein contained 1.35 grams per tonne gold (Assessment Report 11963). Trench 1, which is located 500 metres north-northwest of Trench 2, contains several narrow (less than 1 centimetre wide) veins with tetrahedrite, however, low gold and silver values resulted from sampling.