Numerous outcrops of limestone occur in the vicinity of the Bralorne Takla mercury mine (093N 008), just west of Silver Creek, 145 kilometres northwest of Fort St. James.

The deposit lies within a 200-kilometre long, northwest-trending belt of massive Permian to Pennsylvanian limestone with minor chert and argillite assigned to the Carboniferous to Jurassic Cache Creek Complex. The belt is bound to the west by the northwest-striking Pinchi fault zone. Overlying chert, argillite and greenstone (andesite) of the Cache Creek Complex outcrop to the west. The belt is up to 2 kilometres wide to the west of Silver Creek, which flows along the Pinchi fault zone.

Hydrothermal activity along the fault zone has resulted in the variable dolomitization of these carbonates. The limestone in the vicinity of the Bralorne Takla mercury mine is variably brecciated and white to blue-grey to buff in colour. A sample of brecciated buff-coloured limestone from the "A" showing at the mine analysed 50.06 per cent CaO, 0.05 per cent MgO, 3.04 per cent SiO2, 0.41 per cent Fe2O3+Al2O3 and 4.21 per cent insolubles (Geological Survey of Canada Memoir 253, page 36, Sample 11). A second sample of white limestone from the same showing analysed 56.05 per cent CaO, 0.05 per cent MgO, nil SiO2, 0.10 per cent Fe2O3+Al2O3 and 0.19 per cent insolubles (Geological Survey of Canada Memoir 252, page 36, Sample 10).