 | | Journal (article/letter/editorial) | | Lakehead University, Thunder Bay, Ontario P7B 5E1, Canada a r t i c l e i n f o Article history: Received...xxxx Keywords: Carbonatites Niobium ore deposits Pyrochlore Laterite Supergene ores a b s t r a c t This...production of Nb, with the primary St. Honoré carbonatite and other sources accounting for only for 7 and...deposit is unique with respect to the varieties of pyrochlore present; extent of replacement by other minerals;...petrographically-defined units of carbonatite contain distinct suites of pyrochlore. Bulk rock analysis for Nb |  | | Journal (article/letter/editorial) | | “Coltan,” that caused Ta mines in Australia and Canada to be placed on care and maintenance. More recently...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 |  | | Report (issue) | | Ministry of Energy, Mines and Petroleum Resources British Columbia Geological Survey Paper 2019-01 Geological...Ministry of Energy, Mines and Petroleum Resources British Columbia Geological Survey Paper 2019-01 Ministry...Resources Mines and Mineral Resources Division British Columbia Geological Survey Recommended citation...petrology of rocks in the Decar area, central British Columbia: Petrologically constrained subdivision of...Fieldwork 2018, British Columbia Ministry of Energy, Mines and Petroleum Resources, British Columbia Geological |  | | 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) | | niobium, metallogeny of tantalum, tantaloniobates, carbonatite, nepheline syenite, alkali granite, syenite,...less than 100000 tons of Nb2О5 (including past mining, if it took place). The number of such objects...Siilinjärvi carbonatite and Saharjok nepheline–syenite (Zozulya et al., 2007). In the former, pyrochlore is only...(28) Elk Creek; (29) Afrikanda; (30) Aley; (31) Upper Fir; (32) Chuktukon; (33) Toongi; (34) Baerzhe; (35)...Bolshetagninskoe Saint-Honoré Elk Creek Afrikanda Aley Upper Fir Chuktukon Toongi Baerzhe Bonga Kaluwe Mrima Hill |  | | Journal (volume) | | Strashimir Borisov Strashimirov, University of Mining and Geology “St. Ivan Rilski” (BG), Nada Vasković................................245 EG52 Platinum-group minerals in the new millennium....................Geological Sciences, University of Manitoba, Winnipeg, Canada (frank_hawthorne@umanitoba.ca) Recent advances...consideration remains the environmental impacts of mining uranium and the final disposition of nuclear wastes...a vast range of geologic environments from the upper mantle through to the near surface environment. |
|
