The Copper Valley showing occurs about halfway along the stream valley, between Morte Lake and Hyacinthe Bay on the southwestern half of Quadra Island.

This half of the island lies within the Insular Belt and is underlain primarily by andesitic volcanic rocks of the Upper Triassic Karmutsen Formation, Vancouver Group. These are overlain and bounded on the east by a northwest trending belt of Upper Triassic Quatsino Formation limestone, also of the Vancouver Group.

Mineralization on the Copper Valley occurrence consists mainly of two layers of chalcocite, up to 1.2 metres thick, occurring within andesite. Occasional bornite and malachite were observed on a cliff side. Bulldozing was carried out along a length of 120 metres at the cliff base that carried copper mineralization. Over 7.3 tonnes of ore were selected and shipped for leaching. This shipment assayed 2.0 per cent copper (Sheppard, 1970).

One of several holes drilled in 1970 in the Copper Valley 4 claim cut andesite carrying varying amounts of chalcocite. One 4.9 metre length assayed about 1.3 per cent copper per tonne (Sheppard, 1972). Another hole intersected flecks of native copper at the 61 metre level.

A chip sample on the adjoining David 1 claim, taken from a 1.2 by 1.8 metre area, assayed 3.27 per cent copper, 0.34 grams per tonne gold and 6.86 grams per tonne silver (Sheppard, 1972).