The S or Bob occurrence is located on Quadra Island approxi- mately 2.5 kilometres west of Open Bay. The geology of the area consists of volcanic rocks of the Upper Triassic Karmutsen Formation. Some limestone of the Triassic Quatsino Formation has been reported west of this occurrence in contact with the Juro-Cretaceous Coast Plutonic Complex.

Chalcopyrite and pyrite is contained in a quartz vein which appears as a small pod. The vein is found in grey to greenish grey andesites and/or basalts with phenocrysts of feldspar.

A "mine dump" grab sample near an old working assayed 4.20 per cent copper and 0.1 grams per tonne gold (Assessment Report 3522).

Chalcocite, azurite and malachite were also observed in outcrop just over 1 kilometre to the west coat the old workings.