The Baramba occurrence is underlain by north-north-west striking volcanics and sediments of the Lower Cretaceous Gambier Group which are intruded by quartz monzodiorite of the Mesozoic Coast Plutonic Complex.

At the occurrence, feldspathic sediments and andesite have been epidote altered and strongly fractured and sheared along a 240 metre wide zone. Pyrrhotite, pyrite, magnetite and chalcopyrite occur over a width of 4.9 metres in some of the fissures within the shear zone. The mineralization strikes 070 degrees and dips 80 degrees north. A representative sample assayed 0.3 per cent copper, with only traces of gold and silver (Minister of Mines Annual Report 1917, page F284).

The 1917 Annual Report states that most of the exploration activities took place on the Third Chance claim whose exact location is not known. Additional development is reported at a location 30 metres above sea level.