The property is underlain by massive lava flows, pillow lavas and breccias of the Vancouver Group, Upper Triassic Karmutsen Formation in fault contact with massive grey limestones, flaggy black limestone and argillite of the Sadler, Peril and Sandilands Formations, respectively, all of the Jurassic to Triassic Kunga Group. These rocks are intruded by acid to intermediate dikes and diorite- quartz diorite plugs related to the Middle Jurassic San Christoval Plutonic Suite.

A major north-northwest trending and 50 to 60 degree northeast dipping fault, separating the sediments to the east and volcanics to the west, is part of the Rennell - Louscoone fault system.

The Kunga rocks are strongly hornfelsed and locally skarn has developed in an area of dikes and plugs of diorite to quartz diorite. This area of dioritic intrusives is enveloped by a 100 to 300 metre wide halo of hard flinty hornfelsed argillites. Pyrite and pyrrhotite are common within the hornfels zone. Within the diorite a few scattered quartz veins contain pyrite, chalcopyrite and molybdenite.

A drill hole intersected anomalous gold values related to intensely recrystallized and altered sediments. A 45-metre intersection averaged 0.3 grams per tonne gold with a high of 0.9 grams per tonne gold over 3.0 metres (Assessment Report 9718).