Pyrite and pyrrhotite have been reported to occur in Upper Triassic shales and andesitic volcanics of the Tats Complex along the south side of Pampero Ridge. Values up to 2.39 per cent zinc, 0.11 per cent copper and 1.8 grams per tonne silver have been reported from andesite dykes, flows, and veins in andesite. Sphalerite has not been reported despite elevated zinc values.