Formation of columbite and microlite after alteration of Nb- and Ta-bearing biotite from the Lizaizhai pegmatite (Guangning ore district, Guangdong, South China): Identification of a new potential Nb–Ta mineralization type
作者: Zhaoyu YangRucheng WangXudong CheRong YinLei XieHuan Hu
作者单位: 1State Key Laboratory for Mineral Deposits Research, School of Earth Sciences and Engineering, Nanjing University, Nanjing 210023, China
2School of Earth Sciences and Engineering, Sun Yat-sen University, Guangzhou 510275, China
刊名: Journal of Asian Earth Sciences, 2020, Vol.190
来源数据库: Elsevier Journal
DOI: 10.1016/j.jseaes.2019.104154
关键词: PegmatiteSouth ChinaBiotiteNb–Ta oxide minerals
英文摘要: Abstract(#br)The Lizaizhai pegmatite is located in Guangning, Guangdong Province, South China. Unlike common rare-element (Li–Sn–Nb–Ta) pegmatites in Guangning, which contain muscovite as the dominant mica, the Lizaizhai pegmatite represents a different type of rare-element mineralization with biotite as the dominant mica. Our detailed study shows that the Lizaizhai pegmatite can be divided into a border zone and a core zone. Biotite in the border zone contains lower contents of Ta (mean 121 ppm) and higher contents of Ti (mean TiO 2 = 0.31 wt%) and Nb (mean 409 ppm) compared with biotite in the core zone, which contains slightly more Ta (mean 381 ppm) than Nb (mean 375 ppm) and Ti (mean TiO 2 < 0.1 wt%). The primary Nb–Ta oxide minerals consist of Ta–Nb-rich rutile, columbite-group...
全文获取路径: Elsevier  (合作)
影响因子:2.379 (2012)

  • microlite 微晶石
  • alteration 蚀变
  • biotite 黑云母
  • pegmatite 伟晶岩
  • bearing 方位
  • minerals 矿物
  • columbite 铌铁矿
  • potential 
  • mineralization 成矿酌
  • after 在之后