Molybdenum, tungsten and tin deposits and associated granitoid intrusions in the northern Canadian Cordillera and adjacent parts of Alaska

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Texte
Sommaire: The Poison Mountain Cu-Au-Mo deposit, 90 km north of Lillooet, British Columbia, on the eastern edge of the Coast Plutonic Belt, is jointly hosted by hornfelsed Lower Cretaceous continental arenaceous sedimentary rocks and Late Paleocene stocks and dikes of biotite quartz diorite composition. Concentric zones of sulphide and minor oxide mineralization surround a barren, similar aged, central intrusion of granodiorite. The inner zone, characterized by fracture-controlled and disseminated...
Publication: Special Volume
Auteur(s): R. BROWN: Quest Canada Resources Corporation, Vancouver, British Columbia
Mots clés: Cu-Au-Mo deposit, Poison Mountain, Biotite quartz diorite, K-Ar age determination.
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: This paper offers a comprehensive review of the numerous economic features that influence or have influenced the profitability of porphyry copper and molybdenum deposits in western Canada, notably in British Columbia.
Over the thirty years since the opening of the Bethlehem Copper mine in 1963, porphyry deposits have supported thirteen producing mines, provided over two billion tonnes of ore, and yielded some 6 Mt of copper and 300 000 t of molybdenum. Six deposits have contributed very...
Publication: Special Volume
Auteur(s): H. K. TAYLOR: Professional Engineer North Vancouver, British Columbia
Mots clés: Economics, Porphyry copper deposits, Molybdenum deposits, British Columbia, Improvements
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: Copper-gold porphyry deposits are associated with both alkaline and calc-alkaline, Early Mesozoic plutonic rocks in the Canadian Cordillera. These intrusions were emplaced into mainly volcanic and sedimentary strata of the Upper Triassic Nicola, Triassic to Lower Jurassic Takla and Triassic Stuhini groups of Quesnellia and Stikinia. In several instances the volcanic country rocks are strongly alkaline in character. Intrusive rocks that either host, or are closely spatially and probably...
Publication: Special Volume
Auteur(s): J.K. MORTENSEN, O.K. GHOSH: Mineral Deposit Research Unit, Department of Geological Sciences, The University of British Columbia, Vancouver, British Columbia; F. FERRI: Geological Survey Branch, British Columbia Ministry of Energy, Mines and Petroleum Resources, Victoria, British Columbia
Mots clés: Copper-gold porphyry deposits, Canadian Cordillera,
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: The Poplar copper-molybdenum-gold porphyry deposit is hosted by a calc-alkaline intrusion belonging to the Bulkley Intrusive Suite of Late Cretaceous age. The deposit is located within the Intermontane Belt in west-central British Columbia and lies in the Interior Plateau physiographic region west of Prince George, British Columbia.
The Poplar stock intrudes Jurassic Hazelton Group volcanic and volcaniclastic rocks which include a significant clastic sedimentary component. The stock appears...
Publication: Special Volume
Auteur(s): G.D. HOUSE: Consulting Geologist, North Vancouver, British Columbia; B. AINSWORTH: Ainsworth-Jenkins Holdings Inc., Vancouver, British Columbia
Mots clés: Poplar, Copper-molybdenum deposit, British Columbia, Jurassic Hazelton Group, Intrusive batholith, Classical prospecting
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: Between 1970 and 1990 the Brenda mine milled 177 million tonnes of ore grading 0.169% Cu and 0.043% Mo from the calc alkalic Brenda stock which at the start of production was estimated to contain 159.3 million tonnes grading 0.183% Cu and 0.049% Mo (0.082 MoS.). The stock is a composite quartz-diorite/ granodiorite body of Jurassic age which intrudes Upper Triassic sedimentary and volcanic rocks of the Nicola Group. The initial extraction rate of 21 500 tonnes per day was gradually increased...
Publication: Special Volume
Auteur(s): R.M. WEEKS: Consultant, Kelowna, British Columbia; R.G. BRADBURN: Brenda Mines Ltd., Kelowna, British Columbia; B.C. FLINTOFF: Brenda Process Technology, Kelowna, British Columbia; G.R. HARRIS: Consultant, Peachland, British Columbia
G. MALCOLM: Consultant, Kelowna, British Columbia
Mots clés: Brenda Mine, Porphyry, Molybdenum, Copper, Economics, Low-cost, Human resources
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: Washington State's diverse geological setting is reflected by its several types of porphyry Cu-Mo deposits. All are associated with calc-alkaline intrusions, and they range in age from Jurassic to Miocene.
The largest is the Mount Tolman Mo-Cu deposit located in the Omineca Belt. It contains 2.18 billion tonnes of material averaging 0.093% MoS2 and 0.09% Cu. There are intermediate-size Mesozoic deposits in the Intermontane Belt. The Cascade volcanic arc hosts small- to medium-Tertiary...
Publication: Special Volume
Auteur(s): R. LASMANIS: Department of Natural Resources, Division of Geology and Earth Resources, Olympia, Washington
Mots clés: Washington, Porphyrym Tectonic setting, Cu-Mo deposits
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: The Louise Lake Cu-Mo-Au-As high level porphyry system, located 33 km west of Smithers, British Columbia, has been explored by several companies since its discovery in 1968. The property is situated in the Intermontane tectonic belt near the western end of the Skeena arch. A regional scale fault occupying the Coal Creek Lineament separates Skeena Group sedimentary rocks on the northwest from Hazelton Group volcanic rocks on the southeast. Alteration and mineralization are controlled by a 100m...
Publication: Special Volume
Auteur(s): D.J. HANSON Consulting Geologist, Quick, British Columbia R.W. KLASSEN
Consulting Geologist, Vancouver, British Columbia
Mots clés: Porphyry system, Mineralization, Tennantite, Enargite
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: The Fish Lake porphyry copper-gold deposit is situated 130 km southwest of Williams Lake, British Columbia, near the southwestern edge of the Intermontane Belt. The deposit is spatially and genetically related to the Late Cretaceous Fish Lake Intrusive Complex. This Complex consists of the steeply-dipping, lenticular Fish Creek quartz diorite stock surrounded by an east-west swarm of subparallel quartz feldspar porphyry dikes. The greater part of the deposit, however, is hosted by adjacent...
Publication: Special Volume
Auteur(s): N.M. CAIRA, A. FINDLAY and C. DeLONG: Taseko Mines Limited, Vancouver, British Columbia; C.M. REBAGLIATI: Consultant, Taseko Mines Limited, Vancouver, British Columbia
Mots clés: Porphyry, Copper-gold deposit, Fish lake
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: The Huckleberry copper-molybdenum porphyry system is located in the Tahtsa Lake district of west-central British Columbia. The system contains two copper-molybdenum zones that are associated with porphyritic hornblende-biotite-feldspar granodiorite intrusions of Late Cretaceous age (Bulkley Intrusions) which have intruded Jurassic Hazelton Group volcanic rocks. Mineralization in both zones is largely within hornfelsed Hazelton Group volcanic rocks surrounding the porphyritic intrusions,...
Publication: Special Volume
Auteur(s): A. JACKSON: Consulting Geologist, Vancouver, British Columbia; K. ILLERBRUN: New Canamin Resources Ltd., Smithers, British Columbia
Mots clés: Copper-molybdenum, Porphyry, Mineralization, Zone of alteration.
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: Big Onion is an inactive porphyry copper prospect located 16 km east of Smithers, British Columbia. It was explored during the 1960s and 1970s by a total of 16 708 m of core and rotary drilling. Recognition of supergene chalcocite in unsampled drill core and subsequent geological re-interpretation were instrumental in discovery of the Big Onion deposit. The Cu-Mo deposit is related to a multiphase intrusive suite emplaced into mafic volcanic and sedimentary rocks of the Hazelton Group. The...
Publication: Special Volume
Auteur(s): P. WOJDAK: British Columbia Ministry of Energy, Mines and Petroleum Resources, Smithers, British Columbia; G.C. STOCK: British Columbia Ministry of Transportation and Highways, Vancouver, British Columbia
Mots clés: Porphyry, Copper, Big Onion, Core drilling, Rotary Drilling, Exploration, Pyrite halo
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: The Island Copper Cluster (ICC), situated at the northern end of Vancouver Island, consists of five porphyry Cu-Au-Mo systems (Island Copper, Bay Lake, G zone, Red Island and Rupert Inlet) and a porphyry Cu-Mo system (Northwest zone) genetically associated with Jurassic stock and dike-like rhyodacitic porphyries (c. a. 175 Ma) that intruded comagmatic island arc, calc-alkaline basalts, andesites, pyroclastic and sedimentary marine rocks of the Bonanza Group. These share similarities in...
Publication: Special Volume
Auteur(s): J.A. PERELLO: Minera BHP de Chile Inc., Santiago, Chile; J.A. FLEMING: BHP Minerals Canada Ltd., Port Hardy, British Columbia; K.P. O'KANE: Minera Escondida Ltda., Antofagasta, Chile; P.O. BURT: BHP Minerals Canada Ltd., Toronto, Ontario; G.A. CLARKE: BHP Iron Ore Pty. Ltd., Newan, Australia; M.D. HIMES: BHP Minerals Ltd., Kelowna, British Columbia; A.T. REEVES: BHP Minerals Canada Ltd., Port Hardy, British Columbia
Mots clés: Island Copper Cluster, ICC, Porphyry, Jurassic stock, Rhyodacitic porphyries, Orebody, Gold, Copper
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: Porphyry deposits in the Canadian Cordillera formed during two separate time periods: Late Triassic to Middle Jurassic and Late Cretaceous to Eocene. Deposits of the Early Mesozoic period occur in at least three different arc terranes: Wrangellia, Stikinia and Quesnellia, with a single deposit in the oceanic assemblage of the Cache Creek terrane. These terranes were outboard from continental North America during the formation of most of their contained porphyry deposits. Some of the deposits...
Publication: Special Volume
Auteur(s): W.J. McMILLAN: British Columbia Ministry of Energy, Mines and Petroleum Resources, Victoria, British Columbia; J.F.H. THOMPSON: Mineral Deposit Research Unit, Department of Geological Sciences, The University of British Columbia, Vancouver, British Columbia; C.J.R. HART and S.T. JOHNSTON: Canada/Yukon Geoscience Office, Whitehorse, Yukon Territory
Mots clés: Porphyry deposits, Geology, formation
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: Catface is a calc-alkalic, Cu-Mo deposit situated on the rugged west coast of Vancouver Island. The claims covering the property are owned by Falconbridge Limited. A partially defined resource known as the Cliff zone contains 124 million tonnes grading 0.46% Cu. To the north, a higher grade but smaller mineralized zone known as the Irishman Creek zone was discovered, but not delineated. Mineralization is related to a small, mid-Eocene, porphyritic quartz diorite to granodiorite stock that...
Publication: Special Volume
Auteur(s): S.G. ENNS: Consulting Geologist, North Vancouver, British Columbia; J.J. McDOUGALL
J.J. McDougall & Associates, Richmond, British Columbia
Mots clés: Calc-alkalic, Cu-Mo deposit, Cliff zone, Mineralization, Chalcopyrite, Bornite, Molybdenite
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: The Casino deposit, located in the Dawson Range mountains in the west-central Yukon Territory, is unique among Canadian porphyry deposits. It hosts significant concentrations of copper, gold and molybdenum, has a substantially preserved leached cap (oxidegold), and a well-developed copper-enriched supergene zone. Rocks of the Paleozoic or older Yukon Metamorphic Complex are intruded by the Mid-Cretaceous Dawson Range Batholith. The batholith, mainly granodiorite, is the dominant country rock...
Publication: Special Volume
Auteur(s): B. BOWER: Pacific Sentinel Gold Corp., Vancouver, British Columbia; J. PAYNE: Consultant, Pacific Sentinel Gold Corp., Vancouver, British Columbia; C. DeLONG
Pacific Sentinel Gold Corp., Vancouver, British Columbia; C.M. REBAGLIATI: Consultant, Pacific Sentinel Gold Corp., Vancouver, British Columbia
Mots clés: Porphyry deposit, Yukon, Palezoic rocks
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: The Berg porphyry Cu-Mo deposit is in the Tahtsa Mountain Ranges approximately 84 km southwest of Houston, British Columbia. Mineralization is localized in and adjacent to one of several ca. 50 Ma quartz monzonite intrusions in the area. Two mineralized zones with a mineral resource of 250 million tonnes grading 0.40% Cu and 0.052% MoS2 (at a 0.25% Cu cutoff) occur in a highly fractured zone superimposed on homfelsed Hazelton Group volcanic rocks which occur adjacent to a quartz diorite...
Publication: Special Volume
Auteur(s): D. R. HEBERLEIN: Minera American Barrick Ltda. Santiago, Chile
Mots clés: Porphyry, Cu-Mo deposit, Quartz mazonite intrusion, facies, Hypogene mineralization.
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: Morrison and Hearne Hill are classic porphyry copper-gold deposits associated with a Tertiary continental magmatic arc in westcentral British Columbia. The deposits are located within and around dikes and plugs of an Eocene high-potassium calc-alkaline suite, the Babine Igneous Suite. Despite the calc-alkaline major element geochemistry, rocks of the Babine Igneous Suite possess immobile trace element ratios typical of alkaline rocks and may have been derived from an alkaline precursor or...
Publication: Special Volume
Auteur(s): P.L. OGRYZLO: Consulting Geologist, Vancouver, British Columbia; G.E. DIROM: Consulting Geological Engineer, North Vancouver, British Columbia; P.G. STOTHART: Brunswick Mining and Smelting Corp., Bathurst, New Brunswick
Mots clés: Porphyry copper-gold deposits, Magmatic arc, Hydrothermal brines, Morrison fault
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: The Bell and Granisle open pit mines exploited two porphyry copper-gold deposits in the Babine Lake region of central British Columbia. The Bell mine produced 303 277 tonnes copper, 12 794 kg gold and 27 813 kg silver from 77.2 million tonnes of ore, while the Granisle mine produced 214 300 tonnes copper, 6833 kg gold and 69 753 kg silver from 52. 7 million tonnes of ore. The deposits are associated with intrusive rocks of a Tertiary continental magmatic arc known as the Babine Igneous Suite....
Publication: Special Volume
Auteur(s): G.E. DIROM: Consulting Geological Engineer, North Vancouver, British Columbia; M.P. DITTRICK: Consulting Geologist, Whitehorse, Yukon; D.R. McARTHUR: Noranda Mining and Exploration Inc., Bell Mine Division, Granisle, British Columbia; P.L. OGRYZLO: Consulting Geologist, Vancouver, British Columbia; A.J. PARDOE: Consultikng Geologist, Quick, British Columbia; P.G. STOTHART: Brunswick Mining and Smelting Corporation Ltd., Bathurst, New Brunswick
Mots clés: Porphyry, Copper-gold deposits, Intrusive rocks, Babine Igneous Suite, Grabens, Biotite-magnetite, Propylitic alteration
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: The Gibraltar porphyry copper deposit is located in central British Columbia 362 km north of Vancouver, British Columbia. Production on the property began in March of 1972. As of December 1992, 241 000 000 tonnes of ore averaging 0.360% Cu have been milled: 147 500 000 tonnes averaging 0.301% Cu (OJXJ8% Mo) have been defined as a mining reserve; and 546 600 000 tonnes averaging 0.287% Cu (0.007% Mo) have been classified as a mineral resource.
The Gibraltar deposit consists of six separate ore...
Publication: Special Volume
Auteur(s): G.D. BYSOUTH: Gibraltar Mines Limited, McLeese Lake, British Columbia; K.V. CAMPBELL: K.V. Campbell & Associates Ltd., North Vancouver, British Columbia; G.E. BARKER and G.K. GAGNIER: Gibraltar Mines Limited, McLeese Lake, British Columbia
Mots clés: Porphyry, Porphyry copper deposit, Batholith, Magmatism, Dynamothermal metamorphism, Ore deposition
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: Porphyry copper-gold, porphyry molybdenum, granitoid-hosted gold, and associated lode deposits occur in several metallogenic belts throughout Alaska. Generally, the older metallogenic belts occur to the north, in interior and northern Alaska, whereas the younger belts occur to the south or west, closer to the Pacific Ocean margin of Alaska. Five older, pre-accretionary metallogenic belts, that formed before tectonic juxtaposition of hasting tectonostratigraphic terranes, occur in Alaska: (1)...
Publication: Special Volume
Auteur(s): W.J. NOKLEBERG: U.S. Geological Survey, Menlo Park, California, U.S.A.; T.K. BUNDTZEN: Alaska Division of Geological and Geophysical Surveys, Fairbanks, Alaska, U.S.A.; D.A. BREW and G. PLAFKER: U.S. Geological Survey, Menlo Park, California, U.S.A.
Mots clés: Porphyry copper-gold deposits, Porphyry molybdenum deposits, Granitoid-hosted
gold deposits, Associated lode deposits
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: Exploration on the Kemess property has delineated two porphyry gold-copper deposits: Kemess South and Kemess North. The property is underlain mainly by Upper Triassic to Lower Jurassic Takla Group mafic flows, breccias and minor sedimentary rocks and by Lower Jurassic Hazelton Group pyroclastics and epiclastics. Lower Jurassic intermediate to felsic plutons intrude the volcanoclastic and sedimentary strata. Several large hydrothermal alteration zones that host porphyry-type mineralization and...
Publication: Special Volume
Auteur(s): C.M. REBAGLIATI: Consultant, El Condor Resources Ltd., Vancouver, British Columbia; B.K. BOWEN: Consultant, El Condor Resources Ltd., Vancouver, British Columbia; D.J. COPELAND: El Condor Resources, Vancouver, British Columbia; D.W.A. NIOSI: Consultant, El Condor Resources Ltd., Toronto, Ontario
Mots clés: Kemess, Porphyry, Copper-gold deposits, Lower Jurassic, Native copper
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: By any measure - tonnage of reserves discovered, milling capacity installed, expenditures expressed in constant dollars, concentration of exploration effort- the 1960s and 1970s were decades of mineral exploration and mine development unprecedented in the Canadian Cordillera and possibly in the world. Eight of the fifteen porphyry deposits mined in British Columbia were discovered during the period 1962 to 1968. A decade of achievement culminated in 1972 when jour major mines were brought on...
Publication: Special Volume
Auteur(s): J.M. NEWELL: Consulting Geologist, Sidney, British Columbia; N.C. CARTER: Consulting Geologist, Victoria, British Columbia; A. SUTHERLAND BROWN: Consulting Geologist, Victoria, British Columbia
Mots clés: Milling, Porphyry deposits, Mineral exploration, Copper mining, Molybdenum mining
Numéro: 1995
Volume: SV 46
Année: 1995
Texte
Sommaire: The Highland Valley porphyry district, in southern British Columbia, has jive major porphyry copper-molybdenum deposits, Valley, Lomex, Bethlehem, Highmont and JA, located within a fifteen square kilometre area in Highland Valley in the central part of the late Upper Triassic Guichon Creek batholith. The batholith, a composite, calc-alkaline and !-type intrusion emplaced about 210 million years ago, cuts and metamorphoses the Carnian to Norian (230 Ma to 208 Ma) Nicola Group country rocks....
Publication: Special Volume
Auteur(s): M.J. CASSELMAN: Cominco Ltd., Vancouver, British Columbia; W.J. McMILLAN: British Columbia Ministry of Energy, Mines and Petroleum Resources, Victoria, British Columbia; K.M. NEWMAN: Highland Valley Copper, Logan Lake, British Columbia
Mots clés: Highland Valley, Porphyry, Porphyry copper deposits, Batholith, Mineralization
Numéro: 1995
Volume: SV 46
Année: 1995
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