 | | Journal (article/letter/editorial) | | as Pb/Pb dates from several carbonatite complexes from Europe and North America are presented and used...less well-defined, events in Canada include magmatism at 1770 Ma from Argor, 570 Ma from Manitou Islands...at 360 Ma from the Canadian Cordillera. One carbonatite from the Ukrainian Shield (Chernigovka) has been...University, 1125 Colonel By Drive, Ottawa, Ontario K1S 5B6, Canada e-mail: arukhlov_ablinova@shaw.ca Present...Building, 4999 - 98 Avenue, Edmonton, Alberta T6B 2X3, Canada of plume magmatism and associated continental |  | | Report (chapter) | | Carleton University Library on May 4, 2015 Alkalic carbonatite magmas- parental or derivative? James D. Twyman...alkalic carbonatite magmas might develop generally during the evolution of commoner carbonatite magmas...whereby other commoner carbonatite rock types are derived from it; the alkalic carbonatite magma is one of two...nephelinitic magma, the other being ijolitic. The carbonatite liquid has 500~ of superheat and loses alkalis...differentiates to produce the commoner types of carbonatite rocks. In rejecting such a scheme we argue as |  | | Journal (article/letter/editorial) | | niobium, metallogeny of tantalum, tantaloniobates, carbonatite, nepheline syenite, alkali granite, syenite,...(Fennoscandian) Shield, namely, Siilinjärvi carbonatite and Saharjok nepheline–syenite (Zozulya et al...(3) Brockman; (4) Katugin; (5) Mount Weld; (6) Argor; (7) Montviel; (8) Two Tom; (9) Strange Lake; (10)...Nechalacho Pitinga Brockman Katugin Mount Weld Argor Montviel Two Tom Strange Lake Tanbreez Motzfeldt...in the same area; 5 bd means baddeleyite; bi, biotite; с, cassiterite; f, fluorite; k, K-feldspar; mo |  | | 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... 3800 Finnerty Road (Ring Road), Victoria, BC, Canada V8P 5C2 G. J. Simandl (*) British Columbia Ministry...Victoria, BC, Canada V8W 9N3 e-mail: george.simandl@gov.bc.ca Fir and Crevier, Canada) are being considered |  | | Report (issue) | | GOVERN YOUR USE OF THIS DOCUMENT Your use of this Ontario Geological Survey document (the “Content”) is governed... copyright is held by the Queen’s Printer for Ontario. It is recommended that reference to the Content...form: Ontario Geological Survey 2020. Summary of Field Work and Other Activities, 2020; Ontario Geological...gold database; in Summary of Field Work, 2020, Ontario Geological Survey, Open File Report 6370, p.10-1...670-5691 Toll-Free: 1-888-415-9845, ext. 5691 (inside Canada, United States) Pubsales.ndm@ontario.ca The Purchase |  | | Report (volume) | | Victoria 3053, Australia DISTRIBUTORS USA and Canada Blackwell Scientific Publications Inc PO Box 50009...carbonatites 53 TWYMAN, J. D. & GITTINS, J. Alkalic carbonatite magmas: parental or derivative ? 85 DAWSON...White Mountain alkaline igneous provinces, eastern North America 433 vi Contents UPTON, B. G. J. & EMELEUS...biotites from the Poohbah Lake syenite in north-western Ontario have been dated at around 2.7 Ga (Mitchell...reported by Larsen et al. (1983) for the Tupertalik carbonatite in western Greenland. At the present time, alkaline |  | | Report (volume) | | be communicated. Frank C. Hawthorne, Winnipeg, Canada Roberta Oberti, Pavia, Italy Giancarlo Della Ventura...University of Manitoba, Winnipeg, Manitoba R3T 2N2, Canada frank_hawthorne@umanitoba.ca Roberta Oberti Istituto...the same. ACKNOWLEDGMENTS FCH was supported by a Canada Research Chair in Crystallography and Mineralogy...Natural Sciences and Engineering Research Council of Canada. In addition, much of the work reviewed here was...NSERC Major Equipment Grants and by grants from the Canada Foundation for Innovation. RO was supported by |
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