Geochemical and SHRIMP U-Pb age constraints on the origin of the Qingbulake mafic-ultramafic complex in the West Tianshan Mountains, Xinjiang, northwest China

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	Geochemical and SHRIMP U-Pb age constraints on the origin of the Qingbulake mafic-ultramafic complex in the West Tianshan Mountains, Xinjiang, northwest China
	Zhang, ZH (Zhang, Z. H.)4; Mao, JW (Mao, J. W.); Wang, ZL (Wang, Z. L.); Pirajno, F (Pirajno, F.); Wang, YB (Wang, Y. B.)
刊名	AUSTRALIAN JOURNAL OF EARTH SCIENCES
	2010
卷号	57 期号:6 页码:819-837
关键词	copper-nickel ores mafic complex petrogenesis Qingbulake SHRIMP uranium-lead dating West Tianshan
ISSN号	0812-0099
英文摘要	The Qingbulake mafic complex hosting a copper-nickel sulfide deposit, Tekesi County, West Tianshan (Xinjiang Uygur Autonomous Region) consists of pyroxene diorite-gabbro, olivine gabbro-pyroxenite, pyroxenite-olivine gabbro, and clinopyroxene peridotite. The geochemical study presented in this paper indicates that the complex is characterised by low Ti, depletion in Nb and Ta, enrichment in LILEs and slight enrichment in light REEs. These geochemical characteristics, combined with isotope systematics, suggest that the formation of the complex may be related to the subduction of the South Tianshan oceanic plate beneath the Central Tianshan plate and their collision and that the magma could be derived from a depleted MORB-source mantle. The magma underwent weak hybridisation with the crust and country rocks during its emplacement. SHRIMP U-Pb dating of zircons in pyroxene diorite samples from the Qingbulake complex yielded a concordia age of 434.4 +/- 6.2 Ma, indicating that the complex was emplaced in the early Silurian (Llandovery). The features of island-arc magma shown by the Qingbulake complex were probably induced by the subduction of oceanic crust beneath the depleted mantle.
学科主题	火成岩岩石学
WOS关键词	TRACE-ELEMENT GEOCHEMISTRY ; NI SULFIDE DEPOSITS ; NW CHINA ; TECTONIC EVOLUTION ; ALTAY OROGENS ; PETROGENESIS ; INTRUSIONS ; ROCKS ; ARC ; ORDOVICIAN
WOS研究方向	Geology
语种	英语
出版者	TAYLOR & FRANCIS LTD
WOS记录号	WOS:000280815400008
内容类型	期刊论文
源URL	[http://119.78.100.197/handle/2HKVOGP0/39123]
专题	中国地质调查局
作者单位	1.[Zhang, Z. H. 2.Mao, J. W. 3.Wang, Z. L.] Chinese Acad Geol Sci, Inst Mineral Resources, Beijing 100037, Peoples R China [Pirajno, F.] Geol Survey Western Australia, Perth, WA 6004, Australia [Pirajno, F.] Univ Western Australia, Sch Earth & Environm, Crawley, WA 6009, Australia [Wang, Y. B.] Chinese Acad Geol Sci, Inst Geol, Beijing 100037, Peoples R China 4.中国地质科学院矿产资源研究所
推荐引用方式 GB/T 7714	Zhang, ZH ,Mao, JW ,Wang, ZL ,et al. Geochemical and SHRIMP U-Pb age constraints on the origin of the Qingbulake mafic-ultramafic complex in the West Tianshan Mountains, Xinjiang, northwest China[J]. AUSTRALIAN JOURNAL OF EARTH SCIENCES,2010,57(6):819-837.
APA	Zhang, ZH ,Mao, JW ,Wang, ZL ,Pirajno, F ,&Wang, YB .(2010).Geochemical and SHRIMP U-Pb age constraints on the origin of the Qingbulake mafic-ultramafic complex in the West Tianshan Mountains, Xinjiang, northwest China.AUSTRALIAN JOURNAL OF EARTH SCIENCES,57(6),819-837.
MLA	Zhang, ZH ,et al."Geochemical and SHRIMP U-Pb age constraints on the origin of the Qingbulake mafic-ultramafic complex in the West Tianshan Mountains, Xinjiang, northwest China".AUSTRALIAN JOURNAL OF EARTH SCIENCES 57.6(2010):819-837.