 | Graupner, T., Melcher, F., Gäbler, H.-E., Sitnikova, M., Brätz, H., Bahr, A. (2010) Rare earth element geochemistry of columbite-group minerals: LA-ICP-MS data. Mineralogical Magazine, 74 (4) 691-713 doi:10.1180/minmag.2010.074.4.691 | Journal (article/letter/editorial) | | concentrations and distribution patterns of columbite-tantalite minerals from Ta-ore provinces worldwide are presented...melt in a pegmatite body (either Nb ? Ta or Fe ? Mn fractionation lines, or both) results in smaller...melt. In general, CGM from each individual Ta-ore province are characterized by a predominance of one type...K EY WORDS : LCT family pegmatites, columbite-tantalite, REE geochemistry, LA-ICP-MS data. Introduction...internal standard; for microlite, 44Ca was used. The Mn and Ca concentrations of each sample spot were previously |  | Melcher, Frank, Graupner, Torsten, Gäbler, Hans-Eike, Sitnikova, Maria, Henjes-Kunst, Friedhelm, Oberthür, Thomas, Gerdes, Axel, Dewaele, Stijn (2015) Tantalum–(niobium–tin) mineralisation in African pegmatites and rare metal granites: Constraints from Ta–Nb oxide mineralogy, geochemistry and U–Pb geochronology. Ore Geology Reviews, 64. 667-719 doi:10.1016/j.oregeorev.2013.09.003 | Journal (article/letter/editorial) | | data 4.4.2.2. Mineralogy 4.4.3. Alto-Ligonha Province (northern Mozambique) 4.4.3.1. Radiometric data 4...Mineralogy NU 5. Mineral chemistry of columbite-tantalite, tapiolite, wodginite and ixiolite in African...Pegmatites of Ethiopia and Somalia 5.4.3. Alto-Ligonha Province (Mozambique) 5.4.4. Damara Belt (Namibia) 5.4...sources 7.2. Compositional variation of columbite-tantalite, tapiolite and wodginite-ixiolite 7.3. Chemical...(Nigeria). Mn-rich columbite-tantalite is typical of the Alto Ligonha Province (Mozambique), CE P the |  | | Journal (article/letter/editorial) | | around the Kenticha mine (Ethiopia) and in the Alto Ligonha Province (Mozambique). Production from pegmatites...(Nigeria); Mn-rich columbite-tantalite is typical of the Alto Ligonha Province (Mozambique), the Arabian-Nubian...Arabian-Nubian Shield (Egypt, Ethiopia) and the Tantalite Valley pegmatites (southern Namibia) and Large...Large compositional variations through Fe-Mn fractionation, followed by Nb-Ta fractionation are typical... the Democratic Republic of the Congo (DRC), Mozambique, Ethiopia, Nigeria and Burundi (Table 1). Notably |  | Melcher, F., Graupner, T., Sitnikova, M., Henjes-Kunst, F., Oberthür, T., Gäbler, H.-E, Bahr, A., Gerdes, A., Brätz, H., Rantitsch, G. (2009) Ein Herkunftsnachweis für Niob-Tantalerze am Beispiel afrikanischer Selten-Element Pegmatite. Mitteilungen der Österreichischen Mineralogischen Gesellschaft, 155. | Journal (article/letter/editorial) | | of minerals, commonly dominated by columbite-tantalite group minerals. In cases, their compositions and...measured in a representative number of columbite-tantalite grains from a given sample. Some elements, e.g...Coltan), orthorhombische Mischkristalle der Reihe [(Fe,Mn)(Nb,Ta)2 O6 ]. Sie sind durch hohe Dichten (5,3-8...(columbite-tantalite group minerals = CGM) werden je nach Zusammensetzung mit den Suffixen (-Fe) und (-Mn) belegt;...La/Li-Verhältnisse und CsGehalte, und in CGM durch Mn/Fe- und Ta/Nb-Verhältnisse wiedergegeben (vgl. SIMMONS |  | Xiong, Yi-Qu, Jiang, Shao-Yong, Wen, Chun-Hua, Yu, Hao-Yu (2020) Granite–pegmatite connection and mineralization age of the giant Renli Ta Nb deposit in South China: Constraints from U–Th–Pb geochronology of coltan, monazite, and zircon. Lithos, 358. 105422 doi:10.1016/j.lithos.2020.105422 | Journal (article/letter/editorial) | | discovered Renli Ta–Nb deposit in northeastern Hunan Province is the largest known pegmatite Ta–Nb deposit in...Renli deposit in the south Mufushan district, northeastern Hunan Province, pr South China, is a recently...granites and rare- metal pegmatites in the Renli district remains unclear. Journal Pre-proof It is widely...2016; Fosso Tchunte et al., 2018). Columbite–tantalite (coltan) group minerals are key ore minerals...part of the late Mesozoic basin-and-range- like province of South China. This tectonic style is defined |
|
