Petrological features and implications for mineralization of the Poshi mafic-ultramafic intrusion in Beishan area, Xinjiang

	Petrological features and implications for mineralization of the Poshi mafic-ultramafic intrusion in Beishan area, Xinjiang
	Su BenXun 1; Qin KeZhang 1; Tang DongMei 1; Deng Gang 2; Xiao QingHua 1; Sun He 1; Lu HongFei 2; Dai YuCai 2
刊名	ACTA PETROLOGICA SINICA
	2011-12-01
卷号	27 期号:12 页码:3627-3639
关键词	Poshi Mafic-ultramafic Intrusion Fractional Crystallization Alteration Reaction Ni-cu Mineralization Beishan Xinjiang
ISSN号	1000-0569
文献子类	Article
英文摘要	Poshi mafic-ultramafic intrusion, located in Beishan area (Xinjiang), has the components of gabbro, dunite and lherzolite in its drill core profile, in which mineral modal varies continuously, and olivine, clinopyroxene and spinel show systematically compositional variations. Marginal compositional reversals' appear in the lherzolites at the bottom of the profile. These features suggest that the formation of the Poshi intrusion was mainly controlled by fractional crystallization and also had contributions from crustal contamination. The presence of amphibole as reaction rim of pyroxene, breakdown of spinel, and chemical variations of hydrous minerals, indicate that the intrusion had been subjected to post-cumulus alterative reaction. The association of discrete sulfide grains and fine veins with early-stage formed minerals (olivine and spinel) suggests that sulfide segregation occurred in the early stage of the magmatic evolution. The crystallization and subsequent precipitation of sulfides was not only related to crustal contamination, but also closely related to post-cumulus alterative reaction as recorded by their occurrence always with hydrous minerals (e. g. phlogopite) and altered minerals (e. g. amphibole and serpentine).
WOS关键词	ORE-FORMING PROCESSES ; ASIAN OROGENIC BELT ; NW CHINA ; CRUSTAL CONTAMINATION ; LAYERED INTRUSIONS ; NORTHERN XINJIANG ; ISOTOPIC ANALYSES ; EASTERN XINJIANG ; SULFIDE DEPOSITS ; NORTHWEST CHINA
WOS研究方向	Geology
语种	英语
出版者	SCIENCE PRESS
WOS记录号	WOS:000299019000010
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/73720]
专题	中国科学院地质与地球物理研究所
通讯作者	Su BenXun
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China 2.Xinjiang Bur Geol & Mineral Resources, Geol Party 6, Hami 839000, Peoples R China
推荐引用方式 GB/T 7714	Su BenXun,Qin KeZhang,Tang DongMei,et al. Petrological features and implications for mineralization of the Poshi mafic-ultramafic intrusion in Beishan area, Xinjiang[J]. ACTA PETROLOGICA SINICA,2011,27(12):3627-3639.
APA	Su BenXun.,Qin KeZhang.,Tang DongMei.,Deng Gang.,Xiao QingHua.,...&Dai YuCai.(2011).Petrological features and implications for mineralization of the Poshi mafic-ultramafic intrusion in Beishan area, Xinjiang.ACTA PETROLOGICA SINICA,27(12),3627-3639.
MLA	Su BenXun,et al."Petrological features and implications for mineralization of the Poshi mafic-ultramafic intrusion in Beishan area, Xinjiang".ACTA PETROLOGICA SINICA 27.12(2011):3627-3639.