Petrogenesis and ore genesis of the Permian Huangshanxi sulfide ore-bearing mafic-ultramafic intrusion in the Central Asian Orogenic Belt, western China

doi:10.1016/j.lithos.2014.04.008

	Petrogenesis and ore genesis of the Permian Huangshanxi sulfide ore-bearing mafic-ultramafic intrusion in the Central Asian Orogenic Belt, western China
	Mao, Ya-Jing 1,2,3; Qin, Ke-Zhang 3; Li, Chusi 4; Xue, Sheng-Chao 2,3; Ripley, Edward M.4
刊名	LITHOS
	2014-07-01
卷号	200 页码:111-125
关键词	Mafic-ultramafic rocks Magmatic sulfide deposit Mineral chemistry Platinum-group elements Huangshanxi intrusion NW China
ISSN号	0024-4937
DOI	10.1016/j.lithos.2014.04.008
文献子类	Article
英文摘要	The Permian Huangshanxi mafic-ultramafic intrusion hosts one of the two largest magmatic sulfide deposits in the Eastern Tianshan which is situated in the southern margin of the Central Asian Orogenic Belt. In this paper we use mineral compositions and whole-rock geochemical data to decipher the genetic relationship between magma evolution and sulfide mineralization. The Huangshanxi intrusion consists of three separate intrusive units. Important sulfide mineralization occurs in the base of the last intrusive unit, an elongated, layered ultramafic body composed of Iherzolite at the bottom, olivine websterite in the middle and websterite at the top. Based on olivine-liquid equilibria and mass balance, the MgO and FeO contents in the parental magma for a Iherzolite sample are estimated to be 8.71 and 8.36 wt.%, respectively. The Huangshanxi mafic-ultramafic intrusive rocks and the estimated "trapped liquids" for several olivine-orthopyroxene cumulate rocks all show light rare earth element enrichments relative to heavy rare earth elements and significant Nb depletions relative to Th and La, which are similar to the characteristics of coeval basalts in the region. The arc-like geochemical features are attributed to pre-Permian mantle metasomatism by slab-derived fluids. Partial melting of the previously-modified mantle is thought to have resulted from heating by upwelling asthenosphere associated with post-subduction lithosphere delamination or by mantle plume activity. The relationship between the Fo and Ni contents of olivine crystals from the Huangshanxi sulfide-poor ultramafic rocks (<1 wt.% S) indicates cotectic sulfide segregation during olivine crystallization. Significant depletions in platinum group elements (PGE) relative to Ni and Cu in the bulk sulfide ores of the Huangshanxi deposit are likely due to sulfide retention in the source mantle. Stratigraphic reversals in olivine Fo contents and bulk sulfide PGE tenors suggest that multiple magma replenishments occurred during the development of the Huangshanxi magmatic Ni-Cu sulfide deposit The sulfide ore formation can be divided into two stages: a conduit stage during which immiscible sulfide droplets and olivine crystals were brought up by ascending magma and an in-situ differentiation stage during which the sulfide droplets and olivine crystals settled to form the sulfide-olivine cumulate zones at the base of the Huangshanxi magmatic system. (C) 2014 Elsevier B.V. All rights reserved.
WOS关键词	TURPAN-HAMI BASIN ; SR-ND ISOTOPES ; U-PB AGE ; NW CHINA ; EASTERN TIANSHAN ; NORTHWEST CHINA ; TECTONIC EVOLUTION ; TRACE-ELEMENT ; ICP-MS ; GEOLOGICAL IMPLICATIONS
WOS研究方向	Geochemistry & Geophysics ; Mineralogy
语种	英语
出版者	ELSEVIER SCIENCE BV
WOS记录号	WOS:000338810700008
资助机构	NSF of China(41030424) ; NSF of China(41030424) ; Chinese Academy of Sciences(KZZD-EW-TZ-20) ; Chinese Academy of Sciences(KZZD-EW-TZ-20) ; Xinjiang Nonferrous Metal Industry Group Ltd. ; Xinjiang Nonferrous Metal Industry Group Ltd. ; NSF of China(41030424) ; NSF of China(41030424) ; Chinese Academy of Sciences(KZZD-EW-TZ-20) ; Chinese Academy of Sciences(KZZD-EW-TZ-20) ; Xinjiang Nonferrous Metal Industry Group Ltd. ; Xinjiang Nonferrous Metal Industry Group Ltd. ; NSF of China(41030424) ; NSF of China(41030424) ; Chinese Academy of Sciences(KZZD-EW-TZ-20) ; Chinese Academy of Sciences(KZZD-EW-TZ-20) ; Xinjiang Nonferrous Metal Industry Group Ltd. ; Xinjiang Nonferrous Metal Industry Group Ltd. ; NSF of China(41030424) ; NSF of China(41030424) ; Chinese Academy of Sciences(KZZD-EW-TZ-20) ; Chinese Academy of Sciences(KZZD-EW-TZ-20) ; Xinjiang Nonferrous Metal Industry Group Ltd. ; Xinjiang Nonferrous Metal Industry Group Ltd.
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/86388]
专题	中国科学院地质与地球物理研究所
通讯作者	Qin, Ke-Zhang
作者单位	1.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Res Ctr Mineral Resource, Urumqi 830011, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 4.Indiana Univ, Dept Geol Sci, Bloomington, IN 47405 USA
推荐引用方式 GB/T 7714	Mao, Ya-Jing,Qin, Ke-Zhang,Li, Chusi,et al. Petrogenesis and ore genesis of the Permian Huangshanxi sulfide ore-bearing mafic-ultramafic intrusion in the Central Asian Orogenic Belt, western China[J]. LITHOS,2014,200:111-125.
APA	Mao, Ya-Jing,Qin, Ke-Zhang,Li, Chusi,Xue, Sheng-Chao,&Ripley, Edward M..(2014).Petrogenesis and ore genesis of the Permian Huangshanxi sulfide ore-bearing mafic-ultramafic intrusion in the Central Asian Orogenic Belt, western China.LITHOS,200,111-125.
MLA	Mao, Ya-Jing,et al."Petrogenesis and ore genesis of the Permian Huangshanxi sulfide ore-bearing mafic-ultramafic intrusion in the Central Asian Orogenic Belt, western China".LITHOS 200(2014):111-125.