 | | Journal (article/letter/editorial) | | https://doi.org/10.1080/25726838.2018.1516935 Carbonatites: related ore deposits, resources, footprint...Suzanne Paradisc a c British Columbia Geological Survey, Victoria, BC, Canada; bSchool of Earth and...Victoria, BC, Canada; Natural Resources Canada NRCan, Geological Survey of Canada, Sidney, BC, Canada ABSTRACT...ABSTRACT ARTICLE HISTORY Most carbonatites were emplaced in continental extensional settings and range in...alkaline silicate igneous rocks, forming alkaline-carbonatite complexes, but some occur as isolated pipes, |  | | Journal (article/letter/editorial) | | ‘conflict’ columbite-tantalite concentrate, or “Coltan,” that caused Ta mines in Australia and Canada to be...placer deposits and weathered crusts overlying carbonatite and peralkaline complexes account for the majority...majority of Ta production. Several carbonatite-related deposits (e.g. Upper Editorial handling: D. Huston...(Ring Road), Victoria, BC, Canada V8P 5C2 G. J. Simandl (*) British Columbia Ministry of Energy and Mines...Victoria, BC, Canada V8W 9N3 e-mail: george.simandl@gov.bc.ca Fir and Crevier, Canada) are being considered |  | | Journal (article/letter/editorial) | | secondary niobium mineral deposits associated with carbonatites Roger H. Mitchell ⁎ Department of Geology, Lakehead...Lakehead University, Thunder Bay, Ontario P7B 5E1, Canada a r t i c l e i n f o Article history: Received...17 March 2014 Available online xxxx Keywords: Carbonatites Niobium ore deposits Pyrochlore Laterite Supergene...economic deposits of niobium associated with carbonatites. The Brazilian supergene deposits account for...production of Nb, with the primary St. Honoré carbonatite and other sources accounting for only for 7 and |  | | Journal (article/letter/editorial) | | consumption led to the respective increase in its mining. The quantity of primary tantalum extracted in...2017, and references therein). The growth in the mining and consumption determined a high level of interest...with a resource estimation (including the former mining if there was any) of no less than 2000 t of Та2O5...(d) nepheline syenites (foidic type), and (e) carbonatite complexes (carbonatitic type). A noticeable part...in geological exploration and in the reports of mining companies. Such resources can hardly be taken into |  | | Journal (article/letter/editorial) | | Manuscript Geology and Mineralogy of the Ashram Zone Carbonatite, Eldor Complex, Québec Roger H. Mitchell, Darren...Smith, Geology and Mineralogy of the Ashram Zone Carbonatite, Eldor Complex, Québec, Ore Geology Reviews (2017)... Geology and Mineralogy of the Ashram Zone Carbonatite, Eldor Complex, Québec Authors Roger H. Mitchella...Geology, Lakehead University, Thunder Bay, Ontario, Canada P7B 5E1 b Commerce Resources Corp., Suite1450-789...Suite1450-789 West Pender Street, Vancouver, British Columbia, Canada V6C 1H2 T6X 1X7 Abstract The Ashram Zone |  | | Journal (article/letter/editorial) | | rare-metal granites is reviewed. Members of the columbite-tantalite group are the most common and economically...& ERCIT, 1989). Especially the members of the columbite-tantalite, tapiolite, wodginite and ixiolite groups...methods that are commonly applied in artisanal mining operations in Africa and South America. The current...oxides Solid solution members of the orthorhombic columbite-tantalite group with the general formula AB2O6...The endmembers are columbite-(Fe), columbite-(Mn), tantalite-(Mn) and tantalite-(Fe). Their composition |  | | Journal (volume) | | Strashimir Borisov Strashimirov, University of Mining and Geology “St. Ivan Rilski” (BG), Nada Vasković...........537 GP82 Alkaline rocks/kimberlites/carbonatites...............................................trace-element patterns similar to kimberlites and carbonatites, with high LREE/HREE, and high contents of alkali...Geological Sciences, University of Manitoba, Winnipeg, Canada (frank_hawthorne@umanitoba.ca) Recent advances...the mechanisms of anoxic Fe redox cycling in the subsurface, and the impact of Fe mineral biotransformations |
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