Compositional variation of aeschynite-group minerals in the Bayan Obo Nb-REE-Fe ore deposit, Inner Mongolia, China | |
Yang, ZM; Smith, M; Henderson, P; LeBas, MJ; Tao, KJ; Zhang, PS | |
刊名 | EUROPEAN JOURNAL OF MINERALOGY |
2001-11-01 | |
卷号 | 13期号:6页码:1207-1214 |
关键词 | aeschynite-group microprobe analysis compositional variation Bayan Obo |
ISSN号 | 0935-1221 |
文献子类 | Article |
英文摘要 | The aeschynite-group minerals occurring in an aegirine-fluorite-dolomite- aeschynite vein in the Bayan Obo Nb-REE-Fe deposit show complex compositional zoning in BSE images, Microprobe analyses revealed that the concentrations of REE2O3 are globally high in aeschynite-group minerals, ranging from 36.72 to 40.32 wt.%. Four species were identified in the same sample, these being aeschynite-(Ce), aeschynite-(Nd), nioboaeschynite-(Ce) and nioboaeschynite-(Nd). The correlations among cations suggest two special coupled substitutions with charge-balanced described by the exchange vectors as CaNb(Nd,Sm,Pr)(-1)Ti-1 and LaNbTh-1Ti-1. The chondrite-normalized REE patterns are hump-shaped with the maximum at Pr or Nd. The chondrite-nomalized La/Nd ratios vary in the range similar to0.15 to 0.40. It indicates that at Bayan Obo aeschynite minerals are relatively strongly La-depleted and Nd-enriched. The compositional variations in aeschynite-group minerals were controlled by the crystal chemistry and affected by fluid composition. |
WOS研究方向 | Mineralogy |
语种 | 英语 |
出版者 | E SCHWEIZERBARTSCHE VERLAGS |
WOS记录号 | WOS:000172473400019 |
内容类型 | 期刊论文 |
源URL | [http://ir.iggcas.ac.cn/handle/132A11/76505] |
专题 | 中国科学院地质与地球物理研究所 |
通讯作者 | Yang, ZM |
作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Nat Hist Museum, Dept Mineral, London SW7 5BD, England 3.Univ Southampton, Dept Geol, Southampton Oceanog Ctr, Southampton SO14 3ZH, Hants, England |
推荐引用方式 GB/T 7714 | Yang, ZM,Smith, M,Henderson, P,et al. Compositional variation of aeschynite-group minerals in the Bayan Obo Nb-REE-Fe ore deposit, Inner Mongolia, China[J]. EUROPEAN JOURNAL OF MINERALOGY,2001,13(6):1207-1214. |
APA | Yang, ZM,Smith, M,Henderson, P,LeBas, MJ,Tao, KJ,&Zhang, PS.(2001).Compositional variation of aeschynite-group minerals in the Bayan Obo Nb-REE-Fe ore deposit, Inner Mongolia, China.EUROPEAN JOURNAL OF MINERALOGY,13(6),1207-1214. |
MLA | Yang, ZM,et al."Compositional variation of aeschynite-group minerals in the Bayan Obo Nb-REE-Fe ore deposit, Inner Mongolia, China".EUROPEAN JOURNAL OF MINERALOGY 13.6(2001):1207-1214. |
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