The Bron occurrence is situated near the divide between Silver and West Kwanika creeks, south of the Bralorne Takla mercury mine (093N 008), approximately 38 kilometres east-northeast of Takla Landing.

The area is underlain by a north-northwest striking, steeply west-dipping sequence of interbedded limestone and argillaceous and chloritic schist assigned to the Carboniferous to Jurassic Cache Creek Complex. These rocks occur within and west of the Pinchi fault zone, a major structural feature traversing the area from north to south. Grey, massive limestone is the most common rock type observed in the area of the occurrence, and it is invariably brecciated and/or dolomitized. North-northwest striking, steeply west-dipping schist and rusty coloured, slaty siltstone were observed to be interbedded with limestone locally.

Early reports (1944) describe a zone of cinnabar mineralization three metres wide on the west fork of Kwanika Creek. The cinnabar reportedly occurred as minute crystals in brecciated limestone and as film on slip planes. Diamond drilling undertaken in 1970, however, failed to intersect significant mineralization, partly due to the deep overburden overlying the area.

No recent information concerning this occurrence is available.