The Bram occurrence is located adjacent to the Marble River, approximately 5 kilometres west of its mouth at Varney Bay.

The region is underlain by northwest trending volcanics and sediments of the Upper Triassic Vancouver Group (Karmutsen and Quatsino formations) and the Lower Jurassic Bonanza Group.

On the south shore of Marble River, chalcopyrite and bornite mineralization is hosted by shallow marine, basaltic flows, tuffs and breccias of the Upper Triassic Karmutsen Formation. Bedding conformable mineralization consists of chalcopyrite and bornite filling amygdules and rimmed by quartz. The more common secondary mineralization consists of chalcopyrite and bornite occurring as fracture fillings associated with ubiquitous quartz, epidote, chlorite and zeolite.

Mineralization is also reported from north of the river.

In 1930, the area was first staked under the Lucky Jim, Winner, Royal, Old Dog, Hard Tack and Marble River claims. Trenching and blasting is reported to have been completed on the south side of the river at this time. In 1967, the Kar Group of claims was staked by G. Milbourne and three diamond drill holes, totalling 207 metres, were completed.

In 1981, Baron Resources completed a geochemical survey on the Marble River area. A rock chip sample assayed 5.09 per cent copper, 10.97 grams per tonne silver and 0.17 gram per tonne gold across 9.1 metres (Assessment Report 9317).

In 1993, Kennecott Canada completed a program of rock and soil sampling and geological mapping on the Marble Arch claims. Rock chip sampling had assay values up to 2.8 per cent copper and 5.9 parts per million silver (Assessment Report 23074).