Timing and genesis of Cu-(Au) mineralization in the Khetri Copper Belt, northwestern India: constraints from in situ U-Pb ages and Sm-Nd isotopes of monazite-(Ce)

doi:10.1007/s00126-018-0823-3

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 岩石圈演化国家重点实验室

	Timing and genesis of Cu-(Au) mineralization in the Khetri Copper Belt, northwestern India: constraints from in situ U-Pb ages and Sm-Nd isotopes of monazite-(Ce)
	Li, Xiao-Chun 1; Zhou, Mei-Fu 1; Williams-Jones, A. E.2; Yang, Yue-Heng 3; Gao, Jian-Feng 4
刊名	MINERALIUM DEPOSITA
	2019-04-01
卷号	54 期号:4 页码:553-568
关键词	Monazite-(Ce) U-Pb dating Sm-Nd isotopes Neoproterozoic Khetri Copper Belt
ISSN号	0026-4598
DOI	10.1007/s00126-018-0823-3
英文摘要	The Khetri Copper Belt (KCB) in northwestern India contains several economically important hydrothermal Cu-(Au) deposits. Orebodies in these deposits are locally rich in monazite-(Ce). In this study, in situ U-Pb ages and Sm-Nd isotopic compositions of monazite-(Ce) are used to constrain the timing of mineralization and to better understand the genesis of the Cu-(Au) deposits. Monazite-(Ce) crystals were identified in the Madhan-Kudhan and Kolihan deposits in the KCB. Most monazite-(Ce) crystals in the two deposits show close textural associations with hydrothermal minerals (biotite, chlorite, and sulfide) and have low contents of ThO2 (mostly <2wt.%), indicating a hydrothermal origin. The hydrothermal monazite-(Ce) crystals have U-Pb ages of 833 +/- 5 to 840 +/- 6Ma, which are interpreted to represent the timing of the mineralization in the KCB. Another set of monazite-(Ce) crystals in the Kolihan deposit has relatively high contents of ThO2 (4.72wt.% on average) and commonly shows concentric zonation with respect to Th. They have a weighted average Pb-207/Pb-206 age of 1362 +/- 29Ma, which may record a pre-ore metamorphic event in the KCB. Hydrothermal monazite-(Ce) crystals from the Madhan-Kudhan deposit have epsilon(Nd)(t=835Ma) values ranging from -4.3 to -16.8 (-9.6 on average), indicating that isotopically heterogeneous materials were in the metal sources or along the flow paths of hydrothermal fluids. The ages of Cu-(Au) deposits in the KCB fall within the age range of the regional Ca-Na metasomatism (830 to 850Ma). Combining this temporal association with relevant geochemical and isotopic data, we propose that circulation of hydrothermal fluids caused widespread Ca-Na metasomatism, mobilized certain ore-metals, and thus facilitated the formation of Cu-(Au) deposits.
资助项目	NSFC[41473038] ; NSFC[41525012] ; "CAS Hundred Talents" Project
WOS关键词	DELHI OROGENIC BELT ; CONTINENTAL ARC MAGMATISM ; NORTHERN ARAVALLI OROGEN ; MALANI IGNEOUS SUITE ; A-TYPE GRANITES ; LA-ICP-MS ; NW INDIA ; HYDROTHERMAL MONAZITE ; FOLD BELT ; ZIRCON GEOCHRONOLOGY
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000463916700004
资助机构	NSFC ; NSFC ; "CAS Hundred Talents" Project ; "CAS Hundred Talents" Project ; NSFC ; NSFC ; "CAS Hundred Talents" Project ; "CAS Hundred Talents" Project ; NSFC ; NSFC ; "CAS Hundred Talents" Project ; "CAS Hundred Talents" Project ; NSFC ; NSFC ; "CAS Hundred Talents" Project ; "CAS Hundred Talents" Project
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/91313]
专题	地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者	Li, Xiao-Chun; Zhou, Mei-Fu
作者单位	1.Univ Hong Kong, Dept Earth Sci, Pokfulam, Hong Kong, Peoples R China 2.McGill Univ, Dept Earth & Planetary Sci, Montreal, PQ, Canada 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China 4.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang, Guizhou, Peoples R China
推荐引用方式 GB/T 7714	Li, Xiao-Chun,Zhou, Mei-Fu,Williams-Jones, A. E.,et al. Timing and genesis of Cu-(Au) mineralization in the Khetri Copper Belt, northwestern India: constraints from in situ U-Pb ages and Sm-Nd isotopes of monazite-(Ce)[J]. MINERALIUM DEPOSITA,2019,54(4):553-568.
APA	Li, Xiao-Chun,Zhou, Mei-Fu,Williams-Jones, A. E.,Yang, Yue-Heng,&Gao, Jian-Feng.(2019).Timing and genesis of Cu-(Au) mineralization in the Khetri Copper Belt, northwestern India: constraints from in situ U-Pb ages and Sm-Nd isotopes of monazite-(Ce).MINERALIUM DEPOSITA,54(4),553-568.
MLA	Li, Xiao-Chun,et al."Timing and genesis of Cu-(Au) mineralization in the Khetri Copper Belt, northwestern India: constraints from in situ U-Pb ages and Sm-Nd isotopes of monazite-(Ce)".MINERALIUM DEPOSITA 54.4(2019):553-568.