TY - JOUR

T1 - Mineralogical and chemical evolution of tantalum-(niobium-tin) mineralisation in pegmatites and granites. Part 2: Worldwide examples (excluding Africa) and an overview of global metallogenetic patterns

AU - Melcher, F.

AU - Graupner, T.

AU - Gäbler, H.-E.

AU - Sitnikova, M.

AU - Oberthür, T.

AU - Gerdes, A.

AU - Badanina, E.

AU - Chudy, T.

PY - 2017/10

Y1 - 2017/10

N2 - © 2016 Elsevier B.V.Columbite-group minerals (CGM) account for the majority of the production of tantalum, an important metal for high-technology applications. Along with other Ta-Nb oxides such as tapiolite, wodginite, ixiolite and pyrochlore supergroup minerals, CGM are recovered from rare-metal granites and granitic rare-element pegmatites. In this paper mineralogical and geochemical data with a focus on CGM, tapiolite, wodginite and ixiolite are presented for rare-element granites and pegmatites from worldwide occurrences except Africa that has been covered in a previous contribution (Melcher et al., 2015). Major and trace element data of the Ta-Nb oxides are presented and compared for a total of 25 granite/pegmatite provinces, and one carbonatite for comparison. Based on CGM compositions, the data allow to distinguish between various subgroups of Li-Cs-Ta (LCT)-family pegmatites, Nb-Y-F (NYF)-family pegmatites, mixed LCT-NYF pegmatites, and rare-element granites.Each period of Ta-ore formation in Earth h

AB - © 2016 Elsevier B.V.Columbite-group minerals (CGM) account for the majority of the production of tantalum, an important metal for high-technology applications. Along with other Ta-Nb oxides such as tapiolite, wodginite, ixiolite and pyrochlore supergroup minerals, CGM are recovered from rare-metal granites and granitic rare-element pegmatites. In this paper mineralogical and geochemical data with a focus on CGM, tapiolite, wodginite and ixiolite are presented for rare-element granites and pegmatites from worldwide occurrences except Africa that has been covered in a previous contribution (Melcher et al., 2015). Major and trace element data of the Ta-Nb oxides are presented and compared for a total of 25 granite/pegmatite provinces, and one carbonatite for comparison. Based on CGM compositions, the data allow to distinguish between various subgroups of Li-Cs-Ta (LCT)-family pegmatites, Nb-Y-F (NYF)-family pegmatites, mixed LCT-NYF pegmatites, and rare-element granites.Each period of Ta-ore formation in Earth h

U2 - 10.1016/j.oregeorev.2016.03.014

DO - 10.1016/j.oregeorev.2016.03.014

M3 - Article

VL - 89

SP - 946

EP - 987

JO - Ore Geology Reviews

JF - Ore Geology Reviews

SN - 0169-1368

ER -