SOME ND AND SR ISOTOPIC SYSTEMATICS FOR THE REE-ENRICHED DEPOSIT AT BAYAN OBO, CHINA

	SOME ND AND SR ISOTOPIC SYSTEMATICS FOR THE REE-ENRICHED DEPOSIT AT BAYAN OBO, CHINA
	PHILPOTTS, J ; TATSUMOTO, M ; LI, XH ; WANG, KY
刊名	CHEMICAL GEOLOGY
	1991-06-25
卷号	90 期号:3-4 页码:177-188
ISSN号	0009-2541
文献子类	Article
英文摘要	Sm-Nd and Rb-Sr isotopic systematics have been determined for rare-earth element (REE) rich samples of carbonate, iron ore, and silicate types from the world's largest known REE deposit at Bayan Obo, China. The results yielded neither Rb-Sr nor Sm-Nd isochrons within analytical error. Isochronous relationships may have been disturbed in part by younger events. Modes in isotopic composition suggest two Sr reservoirs; the low Sr-87/Sr-86 ratios of 0.703 and 0.704 measured for two carbonates may be of mantle origin. The Sm-Nd data delineate a trend at approximately 1 Ga; this trend might represent a disturbed fractionation event or mixing of Nd reservoirs. The REE ores could not have formed in a single fractionation event during the igneous activity at 260 Ma. Model ages suggest that the ore REE were isolated from mantle sources between approximately 1.7 and approximately 1.3 Ga. This time period hosts major anorogenic igneous activity, including anorthosites, and a number of other unusual REE iron ores.
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:A1991FX14400001
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/81014]
专题	中国科学院地质与地球物理研究所
通讯作者	PHILPOTTS, J
作者单位	1.US GEOL SURVEY,DENVER,CO 80225 2.CHINESE ACAD SCI,INST GEOL,BEIJING,PEOPLES R CHINA 3.ACAD SINICA,INST GEOCHEM,KUANZHOU,PEOPLES R CHINA
推荐引用方式 GB/T 7714	PHILPOTTS, J,TATSUMOTO, M,LI, XH,et al. SOME ND AND SR ISOTOPIC SYSTEMATICS FOR THE REE-ENRICHED DEPOSIT AT BAYAN OBO, CHINA[J]. CHEMICAL GEOLOGY,1991,90(3-4):177-188.
APA	PHILPOTTS, J,TATSUMOTO, M,LI, XH,&WANG, KY.(1991).SOME ND AND SR ISOTOPIC SYSTEMATICS FOR THE REE-ENRICHED DEPOSIT AT BAYAN OBO, CHINA.CHEMICAL GEOLOGY,90(3-4),177-188.
MLA	PHILPOTTS, J,et al."SOME ND AND SR ISOTOPIC SYSTEMATICS FOR THE REE-ENRICHED DEPOSIT AT BAYAN OBO, CHINA".CHEMICAL GEOLOGY 90.3-4(1991):177-188.