Lasqueti Island is dominated by dark, grey-green amygdaloidal and agglomeratic basalt of the Upper Triassic Vancouver Group, Karmutsen Formation. Regional bedding strikes northwest and dips moderately northeast. The volcanic rocks are locally intruded in the False Bay area by a north-northeast trending stock of Early to Middle Jurassic Island Plutonic Suite quartz diorite. Narrow shear zones along the stock margins are common and locally contain minor quartz veining. Some hornfelsing of the basalt is also common along the quartz diorite contact but is not significant on a large scale.

Seams of massive sulphide mineralization in the area are often associated with the shear zones along the quartz diorite contact. These zones are narrow, less than 2 metres wide, strike from 010 to 040 degrees and are evident in basalt and quartz diorite.

The Helen K occurrence area is underlain by amygdaloidal basalt of the Karmutsen Formation, which hosts a 30 to 50 centimetre wide shear zone striking 070 degrees and dipping 28 degrees northwest. A quartz diorite dyke, possibly related to a nearby Island Plutonic Suite quartz diorite stock, locally intrudes the zone.

Mineralization in the shear zone occurs as massive pyrite, chal- copyrite and magnetite. Some quartz, calcite, epidote and bornite also occur. A parallel, slightly structurally lower, shear zone hosts massive magnetite and pyrrhotite mineralization. A rock sample from an adit assayed 1.32 per cent copper, 13.23 grams per tonne gold and 121.4 grams per tonne silver (Assessment Report 16086).

The Helen K showing differs from other nearby shear zone-hosted occurrences (Venus, 092F 131; St. Joseph, 092F 132; Juneau, 092F 133) in that most shears trend north-northeast, but the Helen K shear trends in an east direction. Also, the pyrrhotite-magnetite assem- blage found in an adit at the Helen K is not seen anywhere else in the area.

Past work consisted of two short adits 25 metres apart.