The Wren showing occurs on Porcher Island about 2.5 kilometres south of the Surf Point Mine (103J 017).
Three sub-parallel sheared quartz veins occur in Paleozoic- Mesozoic altered schists. Quartz diorite of the Cretaceous to Tertiary Coast Plutonic Complex has intruded the country rock to the immediate east. The veins strike east to northeast and dip 60 to 90 degrees north. Widths vary from 0.3 to 2 metres and lengths are up to 100 metres. Mineralization consists of pyrite, chalcopyrite and minor bornite. A selected sample assayed 79 grams per tonne gold and 21 grams per tonne silver (Minister of Mines Annual Report 1933, pages 43,44).