In 1980, Cominco Ltd. drilled four vertical percussion-drill holes totalling 366 metres on the Map 4 Fr. claim to test a weak induced polarization conductor. The four holes intersected dioritic intrusive rock of the Iron Mask Hybrid unit of the Late Triassic-Early Jurassic Iron Mask batholith. The dioritic rocks are mineralized with sufficient amounts of disseminated pyrite, magnetite and chalcopyrite to explain the induced polarization anomaly. The rocks are weak to moderately propylitically altered in the form of chlorite, epidote and albite. Drillhole WT80-156 intersected 3 metres grading 0.12 per cent copper (Assessment Report 8512).