The area is underlain by the upper part of the Jurassic to Triassic Kunga Group, comprising thin bedded limy argillite, argillite and minor limestone. The sediments are cut by quartz monzonite of the Carpenter Bay Pluton which is part of the Tertiary Kano Plutonic Suite.

The Kunga Group is strongly folded and faulted and intruded by north to northwest trending dikes of primarily andesitic composition and lesser felsite composition of the Kano Plutonic Suite (Carpenter Bay Dike Swarm). Extensive zones of biotite hornfels are developed near the quartz monzonite pluton.

Pyrite, arsenopyrite, minor chalcopyrite and pyrrhotite mineralization occurs in shear zones associated with quartz-carbonate veinlets and felsite and feldspar porphyry dikes. The mineralized rocks are soft clay-rich zones. The highest gold values from this zone assayed 0.42 and 0.72 grams per tonne over a width of 5 metres (Assessment Report 10021).