- 责任者：Wang Fenlian (Guangzhou Institute of Geochemistry ; Chinese Academy of Sciences ; Guangzhou 510640 ; China) ; Zhao Taiping
- 刊名：Mineral Deposits
- 出版年：2012
- 卷期：31(2)
- 关键词：铌矿 ; niobium ores ; 铌矿 ; niobium ores
- 页码：p.293-308
- 图表：5 illus., 2 tables, 85 refs.
- 分类号：1001
- issnNo：ISSN0258-7106
- isbnNo：CN11-1965/P
Niobium and tantalum ore deposits are mainly hosted in pegmatites, Li-F-rich granites, alkali intrusive rocks, carbonatites and alluvial sandstones. Two main enrichment mechanisms for Nb-Ta ores are suggested： 1) fractional crystallization from granitic melt rich in F, Na and rare metals; and 2) hydrothermal metasomatism of granite after magmatism. The Nb-Ta ore deposits in Panxi area（Panzhihua-Xichang） are mostly distributed along the fracture belt, and the ore bodies are hosted in alkali pegmatite veins and alkali granites, closely related to adjacent syenites and granites widely spread in this area. It is therefore considered that the formation of Nb-Ta ore deposits in Panxi area resulted from both fractional crystallization and hydrothermal metasomatism.