The Vancouver map area contains 348 recorded occurrences, of which 144 are aggregate pits or quarries. The Vancouver map area contains 348 recorded occurrences, of which 144 are aggregate pits or quarries. The map area covers a large portion of the Coast tectonic belt and is dominated by plutonic rocks of the Tertiary to Jurassic Coast Plutonic Complex. Within the plutonics are numerous volcanic and sedimentary roof pendants of Lower Cretaceous, and older, of the Gambier Group and equivalents.
Exploration targets in the roof pendants are volcanogenic massive sulphides and related veins. The highly productive Britannia-Indian River (Britannia, 092GNW003) pendant is a prospective sequence. Mineralized veins and shear zones within the pendants and along the contacts with plutonic rocks are currently receiving attention. The Ashlu (092GNW013) deposit contains combined reserves of 89,350 tonnes, grading 8.57 grams per tonne gold and 12.34 grams per tonne silver.
The Coast complex also hosts porphyry copper-molybdenum mineralization; the Gambier Island (092GNW025) deposit contains measured reserves of 114 million tonnes grading 0.29 per cent copper and 0.018 per cent molybdenum. The northwest trending Harrison Lake fracture system, with associated vein mineralization in Gambier Group rocks, cuts across the northeast part of the map area.
In the western portion of the map area, on Sechelt Peninsula, pendants of Upper Triassic Vancouver Group limestones and dolomites host skarn-type mineralization. The Mineral Hill (092GNW052) deposit contains probable reserves of 291,000 tonnes of wollastonite (up to 50 per cent) and also represents a limestone and garnet source. The Sechelt Carbonate (092GNW031) deposit contains measured geological reserves of 3.5 million tonnes of dolomite. In the southern map area, numerous quarrying operations have exploited clay, dimension stone, shale (fireclay at Sumas Mountain (092GSE004)) and sandstone. On Vancouver Island, near Nanaimo, the Wellington (092GSW048) and Douglas (092GSW029) coal seams, in the Upper Cretaceous Nanaimo Group, have supported many mines in the past.
SELECTED REGIONAL REFERENCES (NTS 092G - VANCOUVER)
Bacon, W.R. (1957): Geology of Lower Jervis Inlet, British Columbia; B.C. Ministry of Energy, Mines
and Petroleum Resources, Bulletin 39.
Carson, D.J.T. (1968): Metallogenic Study of Vancouver Island with Emphasis on the Relationship of
Plutonic Rocks and Mineral Deposits, Ph.D. Thesis, Carleton University.
Carson, D.J.T. (1973): The Plutonic Rocks of Vancouver Island, British Columbia Geological Survey of
Canada, Paper 72-44.
Clapp, C.H. (1912): Southern Vancouver Island; Geological Survey of Canada, Memoir 13 (includes
Clapp, C.H. (1914): Geology of the Nanaimo Map-area; Geological Survey of Canada, Memoir 51.
Gravel, J.L., Jackaman, W., Matysek, P.F. (1990): 1989 Regional Geochemical Survey, Southern
Vancouver Island and Lower Mainland (92B, 92C, 92F & 92G); B.C. Ministry of Energy, Mines and
Petroleum Resources, Geological Fieldwork 1989.
Hudson, R. (1997): A Field Guide to Gold, Gemstone and Mineral Sites of British Columbia, Vol. 1:
Vancouver Island; Orca Book Publishers, pp. 132-166.
Massey, N.W.D. (1994): The Vancouver Island Mineral Potential Project (92B, C,F,G,K,L and 102I;
B.C. Ministry of Energy, Mines and Petroleum Resources, Geological Fieldwork 1994.
Massey, N.W.D. (1995): Geological Compilation, Vancouver Island, B.C. Ministry of Energy, Mines
and Petroleum Resources, Open File 1994-6, 1: 250,000.
Muller, J.E. (1977): Geology of Vancouver Island; Geological Survey of Canada, Open File 463, 1:
Roddick, J.A., Muller, J.E. and Okulitch, A.V., Compilers (1976): Fraser River; Geological Survey
of Canada, Map 1386A, 1: 1,000,000.
BC Geological Survey Publications for NTS 092G