Mantle volatiles and heat contributions in high sulfidation epithermal deposit from the Zijinshan Cu-Au-Mo-Ag orefield, Fujian Province, China: Evidence from He and Ar isotopes

doi:10.1016/j.chemgeo.2017.08.005

	Mantle volatiles and heat contributions in high sulfidation epithermal deposit from the Zijinshan Cu-Au-Mo-Ag orefield, Fujian Province, China: Evidence from He and Ar isotopes
	Wu, Li-Yan 1; Hu, Rui-Zhong 1; Li, Xiao-Feng 1,2; Stuart, Finlay M.1,3; Jiang, Guo-Hao 1; Qi, You-Qiang 1; Zhu, Jing-Jing 1
刊名	CHEMICAL GEOLOGY
	2018-03-05
卷号	480 页码:58-65
关键词	He and Ar isotopes Ore-forming fluids Mantle magmas Zijinshan orefield China
ISSN号	0009-2541
DOI	10.1016/j.chemgeo.2017.08.005
文献子类	Article
英文摘要	The source of metal and sulphur in porphyry and related epithermal deposits is a long debated issue. The role of mantle-derived magmas in providing the metals has proved particularly problematic. Here we report new He and Ar isotope determinations from ore fluids from the Zijinshan high sulfidation-epithermal Cu-Au deposit and Wuziqilong transitional Cu deposit from the giant Zijinshan porphyry-epithermal Cu-Au-Mo-Ag ore system (from 105 to 91 Ma), to decipher the contribution of mantle-derived volatiles and heat. Hydrothermal fluids in pyrite and digenite have He-3/He-4 up to 5.7 R-a, among the highest measured in ancient ore-forming fluids. A linear correlation between He and Ar isotopes indicate that the ore fluids were, to a first order, a mixture between a shallow crustal fluid, with low He-3/He-4, and a dominantly mantle-derived fluid with high He-3/He-4. The mantle He-3/He-4 is close to values typical of the upper mantle indicating the initial magmas that provided the heat for hydrothermal systems did not assimilate large volumes of continental crust. The ore-forming fluids have He-3/heat ratios that are 10 to 80 times higher than that of mid-oceanic ridge hydrothermal fluids, indicating that the metal-bearing fluids acquired heat and volatiles in a convective, rather than conducive, hydrothermal regime. It appears that mantle-derived volatiles, heat and probably metals have made a major contribution to the Cu-AuMo-Ag mineralization in the Zijinshan orefield.
WOS关键词	VALLEY-TYPE DISTRICT ; ORE-FORMING FLUIDS ; DE-FUCA RIDGE ; SOUTH CHINA ; NOBLE-GAS ; GOLD DEPOSIT ; HYDROTHERMAL FLUIDS ; TECTONIC EVOLUTION ; HE-3/HEAT RATIOS ; MESOZOIC BASALTS
WOS研究方向	Geochemistry & Geophysics
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000428012200007
资助机构	National Basic Research Programs of China(2012CB416705 ; National Basic Research Programs of China(2012CB416705 ; National Natural Science Foundation of China(41103023) ; National Natural Science Foundation of China(41103023) ; National Key Research and Development Program of China(2016YFC0600207) ; National Key Research and Development Program of China(2016YFC0600207) ; 2014CB440906) ; 2014CB440906) ; National Basic Research Programs of China(2012CB416705 ; National Basic Research Programs of China(2012CB416705 ; National Natural Science Foundation of China(41103023) ; National Natural Science Foundation of China(41103023) ; National Key Research and Development Program of China(2016YFC0600207) ; National Key Research and Development Program of China(2016YFC0600207) ; 2014CB440906) ; 2014CB440906) ; National Basic Research Programs of China(2012CB416705 ; National Basic Research Programs of China(2012CB416705 ; National Natural Science Foundation of China(41103023) ; National Natural Science Foundation of China(41103023) ; National Key Research and Development Program of China(2016YFC0600207) ; National Key Research and Development Program of China(2016YFC0600207) ; 2014CB440906) ; 2014CB440906) ; National Basic Research Programs of China(2012CB416705 ; National Basic Research Programs of China(2012CB416705 ; National Natural Science Foundation of China(41103023) ; National Natural Science Foundation of China(41103023) ; National Key Research and Development Program of China(2016YFC0600207) ; National Key Research and Development Program of China(2016YFC0600207) ; 2014CB440906) ; 2014CB440906)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82986]
专题	中国科学院地质与地球物理研究所
通讯作者	Hu, Rui-Zhong
作者单位	1.Chinese Acad Sci, Inst Geochem, State Key Lab Ore Deposit Geochem, Guiyang 550002, Guizhou, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 3.Scottish Univ Environm Res Ctr, Scottish Enterprise Technol Pk,Rankine Ave, E Kilbride G75 0QF, Lanark, Scotland
推荐引用方式 GB/T 7714	Wu, Li-Yan,Hu, Rui-Zhong,Li, Xiao-Feng,et al. Mantle volatiles and heat contributions in high sulfidation epithermal deposit from the Zijinshan Cu-Au-Mo-Ag orefield, Fujian Province, China: Evidence from He and Ar isotopes[J]. CHEMICAL GEOLOGY,2018,480:58-65.
APA	Wu, Li-Yan.,Hu, Rui-Zhong.,Li, Xiao-Feng.,Stuart, Finlay M..,Jiang, Guo-Hao.,...&Zhu, Jing-Jing.(2018).Mantle volatiles and heat contributions in high sulfidation epithermal deposit from the Zijinshan Cu-Au-Mo-Ag orefield, Fujian Province, China: Evidence from He and Ar isotopes.CHEMICAL GEOLOGY,480,58-65.
MLA	Wu, Li-Yan,et al."Mantle volatiles and heat contributions in high sulfidation epithermal deposit from the Zijinshan Cu-Au-Mo-Ag orefield, Fujian Province, China: Evidence from He and Ar isotopes".CHEMICAL GEOLOGY 480(2018):58-65.