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Published byCurtis Reynolds Modified over 9 years ago
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By Jacques Houle, P.Eng. May 2014
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BC MINFILE http://www.empr.gov.bc.ca/Mining/Geoscience/MINFILE/Pages/default.aspx BC Mineral Deposit Profiles http://www.empr.gov.bc.ca/Mining/Geoscience/MineralDepositProfiles/Pages/default.aspx BC MapPlace http://www.empr.gov.bc.ca/Mining/Geoscience/MapPlace/Pages/default.aspx
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Highly Varied Deposit Types
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Few Long Life Producers
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Highly Varied Deposit Types
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+95% Wrangellia
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50% Volcanic: 1% Miocene (Alert Bay) 3% Eocene (Metchosin) 10% Jurassic (Bonanza) 30% Triassic (Karmutsen) 6% Devonian (Sicker)
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20% Sedimentary: 9% Cretaceous (Nanaimo) 9% Triassic (Quatsino / Parson Bay) 2% Permian (Buttle Lake)
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25% Intrusive: 1% Miocene (Klaskish) 5% Eocene (Mt. Washington) 15% Jurassic (Island) 3% Triassic (Mt. Hall) 1% Devonian (Saltspring)
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5 % Metamorphic 3% Post-Jurassic (Leech River) 2% Pre-Jurassic (West Coast Complex)
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10% Quaternary Sediment Cover
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Dimension Stone deposit data incomplete to absent Coal deposit data limited but tonnage is significant Metallic deposit data extensive and interesting Copper, Gold, Zinc and Iron most significant metals >C$55 Billion in 185 metal deposits at todays prices
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Dimension stone deposit data largely absent Coal deposit data historically very significant Metallic mineral deposit data dominates Copper, Gold, Zinc and Iron most significant metals >C$25 Billion in 123 metal deposits at todays prices
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Limestone deposits on Texada Island & Northern Vancouver Island dominate industrial minerals data Coal data dominated by Comox area deposits Copper and Gold most significant metals >C$30 Billion in 64 metal deposits at todays prices
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Copper primarily in Porphyry Deposits Gold mainly in Porphyry Deposits, but Exhalative (VMS) Deposits contribute significantly as well Zinc entirely in Exhalative (VMS) Deposits Iron almost entirely in Skarn Deposits
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Copper mainly from Porphyry and VMS deposits Gold mainly as by-product from VMS Cu-Pb-Zn-Ag- Au and Porphyry Cu-Mo-Au deposits, with some from Au Quartz Veins Zinc entirely from VMS deposits Iron mainly from Fe-Cu Skarn deposits
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Copper mainly in Porphyry deposits, with some in VMS deposits Gold mainly in Porphyry Cu-Mo-Au deposits, with significant amounts in both VMS Cu-Pb-Zn-Ag-Au and Au Quartz Vein deposits Zinc almost exclusively in VMS deposits Iron almost exclusively in Fe-Cu Skarn deposits
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1.Convergent Plate Boundary – Island Arc: Porphyry, Epithermal, Skarn, Veins 2.Divergent Plate Boundary – Spreading Centre: VMS (Exhalative)
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Clustered Together!
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Co-genetic and Co-spatial Relationships! Current Erosional Level determines Deposit Depth!
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Widely varied commodities and deposit types Copper, Gold, Zinc, Iron are metals of greatest value Metallic production >C$25 Billion at todays prices Metallic developed prospects >C$30 Billion! Metallic deposit types to target: 1. Porphyry Cu-Mo-Au (Jurassic, Eocene, Miocene) 2. VMS Cu-Pb-Zn-Ag-Au (Devonian) 3. Fe-Cu Skarn (Jurassic, Eocene, Miocene)
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