The Copper Plateau occurrence is located near a small lake on a plateau separating Salal and Thunder creeks.
The area is underlain mainly by intrusive rocks of the Lord Pluton, an Early Tertiary intrusive complex of the Coast Plutonic Complex. Locally, Pleistocene volcanic rocks of the Garibaldi Group overlie the pluton. The dominant rock types include quartz monzonite, biotite granodiorite and quartz diorite with minor amounts of gabbro, hornblendite and intrusive breccia. Dykes of aplite, andesite, feldspar porphyry and gabbro also cut older intrusive rocks.
Locally, sulphide mineralization, mainly chalcopyrite and molybdenite, is strongly fracture- controlled, confined to veins and veinlets mainly within a quartz monzonite. Other sulphide minerals present include bornite, chalcocite and pyrite; oxidation products of sulphides include malachite, azurite and tenorite. Wallrock alteration is weakly propylitic, with sericite and potassium feldspar associated with quartz and sulphides in, and adjacent to, veins.
In 2009, sampling of trench TR09-4 assayed 3.55 per cent copper, 0.04 per cent molybdenum, 20.6 grams per tonne silver and 0.125 grams per tonne gold over 1.0 metre (Sample 13870; Assessment Report 31388). Another trench (TR09-11), located approximately 100 metres to the north east, assayed 0.49 per cent copper over 4.9 metres (Samples 14640 through 14644; Assessment Report 31388).
In 2012, diamond drillhole CP11-03 intercepted 85.2 metres averaging 0.053 per cent copper; including 36.6 metres yielding 0.090 per cent copper (Assessment Report 33319).
In 1970, Canex Aerial Exploration completed programs of geological mapping and an induced polarization survey, totalling 2.5 line-kilometres, on the area as the BR claims. In 1980, Amax of Canada completed a program of geological mapping, ground geophysical surveys and rock, silt and soil sampling. During 2005 through 2012, programs of prospecting, geochemical sampling, trenching, an induced polarization survey and 2031.5 metres of diamond drilling in nine holes were completed on the area as the Copper 1-25 claims.
