 | | Journal (article/letter/editorial) | | granites is reviewed. Members of the columbite-tantalite group are the most common and economically important...mechanisms are proposed. An attempt is made to group Ta-(Nb-Sn-Li) deposits into the LCT (Li-Cs-Ta),...& 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...solution members of the orthorhombic columbite-tantalite group with the general formula AB2O6 (A = Fe2+ |  | | 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 |  | Zhu, Ze-Ying, Wang, Ru-Cheng, Marignac, Christian, Cuney, Michel, Mercadier, Julien, Che, Xu-Dong, Charles, Nicolas, Lespinasse, Marc (2019) Petrogenesis of Nb–(Ta) aplo-pegmatites and fine-grained granites from the Early Cretaceous Huangshan rare-metal granite suite, northeast Jiangxi Province, southeast China. Lithos, 346. 105150 doi:10.1016/j.lithos.2019.105150 | Journal (article/letter/editorial) | | granites that contain Nb-rich mica and very low columbite contents, which are RI PT indicative of a potential...and aplo-pegmatites in which disseminated Nb–Ta columbite is an ore. Two types of fine-grained microclinebearing...albite-rich matrix. Niobium-rich and Mn-poor columbite with Ta# [Ta/(Ta + Nb)] ≤ 0.5 and Mn# MA [Mn/(Mn..., 2014). The chemical zonation of individual columbite–tantalite crystals may record variations in melt...fine-grained granites and AP have lower Nb/Ta ratios and columbite is the major host of Nb and Ta. This study uses |  | | 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............................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 |
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