Sm-Nd isotopic geochronology of the Yinachang Fe-Cu-REE deposit at Wuding, Yunnan Province and its genetic significance

doi:10.1360/04WD145

	Sm-Nd isotopic geochronology of the Yinachang Fe-Cu-REE deposit at Wuding, Yunnan Province and its genetic significance
	Yang, YM ; Tu, GZ ; Hu, RZ ; Shi, XF
刊名	CHINESE SCIENCE BULLETIN
	2005-09
卷号	50 期号:18 页码:2090-2096
关键词	Kunyang rift Yinachang Fe-Cu-REE deposit fluorite Sm-Nd isotopic systematics mesoproterozoic
ISSN号	1001-6538
DOI	10.1360/04WD145
英文摘要	Sm-Nd isotope systematics of ores and fluorites places precise time constraints on REE mineralization of the Yinachang Fe-Cu-REE deposit in Yunnan Province which occur in the Proterozoic Kunyan group. The ore-related fluorites contain high abundant REE, and show a strong enrichment of LREE and a positive Eu anomaly, which is in marked contrast to post-ore fluorites that are HREE enriched. The Sm-Nd isochron ages of the ores and fluorites are 1539 +/- 40 Ma and 1617 +/- 100 Ma, respectively, and calculated epsilon(Nd)(t) are -4.6 and -3.2. Accurate age determinations of the mineralization demonstrate that the REE mineralization took place during early Mesoproterozoic. Together with other geological evidence from the ore deposit, the primary REE-bearing ore-forming fluids are suggested to have been derived from the Enriched Mantle, and the Yinachang Fe-Cu-REE ore deposit is of volcanic exhalation-hydrothermal sedimentary origin. This study also imply that the sudden large-scale REE mineralization in the Mesoproterozoic epoch may have been induced by alkaline-rich anorogenic magmatism which occurred at marginal rifts of the continent in the Mesoproterozoic.
WOS关键词	HYDROTHERMAL FLUIDS ; INNER-MONGOLIA ; ORE-DEPOSITS ; SCHEELITE ; MINERALIZATION ; SUPERCONTINENT ; CONSTRAINTS ; MAGMATISM ; AUSTRALIA ; HUNAN
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000233353700022
内容类型	期刊论文
源URL	[http://ir.fio.com.cn:8080/handle/2SI8HI0U/27438]
专题	自然资源部第一海洋研究所
通讯作者	Yang, YM
作者单位	1.Chinese Acad Sci, Inst Geochem, Guiyang 550002, Peoples R China 2.First Inst Oceanog, Key Lab Marine Sedimentol & Environm Geol, SOA, Qingdao 266061, Peoples R China 3.NW Geol Explorat Bur, CNNC, Xian 710054, Peoples R China
推荐引用方式 GB/T 7714	Yang, YM,Tu, GZ,Hu, RZ,et al. Sm-Nd isotopic geochronology of the Yinachang Fe-Cu-REE deposit at Wuding, Yunnan Province and its genetic significance[J]. CHINESE SCIENCE BULLETIN,2005,50(18):2090-2096.
APA	Yang, YM,Tu, GZ,Hu, RZ,&Shi, XF.(2005).Sm-Nd isotopic geochronology of the Yinachang Fe-Cu-REE deposit at Wuding, Yunnan Province and its genetic significance.CHINESE SCIENCE BULLETIN,50(18),2090-2096.
MLA	Yang, YM,et al."Sm-Nd isotopic geochronology of the Yinachang Fe-Cu-REE deposit at Wuding, Yunnan Province and its genetic significance".CHINESE SCIENCE BULLETIN 50.18(2005):2090-2096.