Compositional variation of aeschynite-group minerals in the Bayan Obo Nb-REE-Fe ore deposit, Inner Mongolia, China

	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/132A11/76503]
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.