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- W2030480136 abstract "The No31 pegmatite group is the largest pegmatite cluster of the Nanping pegmatite field and represents one of the most important Ta-Nb deposits in China. The columbite-tantalite occurring in No31 pegmatites showed faint oscillatory zonation and complex patchy zonation patterns in back-scattered electron images. Microprobe analyses revealed that columbite-tantalite in the pegmatites has a wide range of composition. Neither Mn/(Mn + Fe) nor Ta/(Ta + Nb) atomic ratio has obvious trend of compositional variation along the profile of a single pegmatite dike. However, in the quadrilateral diagrams the compositional trend in columbite-tantalite varies front ferrocolumbite to tantocolumbite, then to manganotantalite. The features of zonation and composition in columbite-tantalite imply that the formation of Nanping pegmatites underwent original differentiation stage and later metasomatism stage." @default.
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- W2030480136 date "2003-08-01" @default.
- W2030480136 modified "2023-09-25" @default.
- W2030480136 title "Columbite-tantalite minerals from Nanping granitic pegmatites, South China: compositional trends and genetic implications" @default.
- W2030480136 doi "https://doi.org/10.1127/0028-3649/2003/2003-0363" @default.
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