中国科学院机构知识库网格系统: Geochemical, Sr-Nd and zircon U-Pb-Hf isotopic studies of Late Carboniferous magmatism in the West Junggar, Xinjiang: Implications for ridge subduction?

Geochemical, Sr-Nd and zircon U-Pb-Hf isotopic studies of Late Carboniferous magmatism in the West Junggar, Xinjiang: Implications for ridge subduction?

文献类型：期刊论文


作者	Geng, Hongyan 1; Sun, Min 1; Yuan, Chao 2; Xiao, Wenjiao 3; Xian, Weisheng 1; Zhao, Guochun 1; Zhang, Lifei 4; Wong, Kenny 1; Wu, Fuyuan 3
刊名	CHEMICAL GEOLOGY
出版日期	2009-08-30
卷号	266 期号:3-4 页码:364-389
关键词	Junggar Granite Central Asian Orogenic Belt U-Pb zircon Sr-Nd-Hf isotopes Geochemistry
ISSN号	0009-2541
DOI	10.1016/j.chemgeo.2009.07.001
文献子类	Review
英文摘要	Voluminous granitic intrusions are distributed in the West Junggar, NW China, and they can be classified as the dioritic rocks, charnockite and alkali-feldspar granite groups. The dioritic rocks (SiO2 = 50.4-63.8 wt.%) are calc-alkaline and Mg enriched (average MgO = 4.54 wt.%, Mg-# = 0.39-0.64), with high Sr/Y ratios (average = 21.2), weak negative Eu (average Eu/Eu = 0.80) and pronounced negative Nb-Ta anomalies. Their Sr-Nd and zircon Hf isotopic compositions ((Sr-87/Sr-86)(i) = 0.7035-0.7042, epsilon(Nd)(t)=4.5-7.9, epsilon(Hf)(t)=14.1-14.5) show a depleted mantle-like signature. These features are compatible with adakites derived from partial melting of subducted oceanic crust that interacted with mantle materials. The charnockites (SiO2 = 60.0-65.3 wt.%) show transitional geochemical characteristics from calc-alkaline to alkaline, with weak negative Eu (average Eu/Eu = 0.75) but pronounced negative Nb-Ta anomalies. Sr-Nd and zircon Hf isotopic compositions ((Sr-87/Sr-86)(i) = 0.7037-0.7039, epsilon(Nd)(t) = 5.2-8.0, epsilon(Hf)(t) = 13.9-14.7) also indicate a depleted source, suggesting melts from a hot, juvenile lower crust. Alkali-feldspar granites (SiO2 = 70.0-78.4 wt.%) are alkali and Fe-enriched, and have distinct negative Eu and Nb-Ta anomalies (average Eu*/Eu = 0.26), low Sr/Y ratios (average = 2.11), and depleted Sr-Nd and zircon Hf isotopic compositions ((Sr-87/Sr-86)(i) = 0.7024-0.7045, epsilon(Nd)(t) = 5.1-8.9, epsilon(Hf)(t) = 13.7-14.2). These characteristics are also comparable with those of rocks derived from juvenile lower crust Despite of the differences in petrology, geochemistry and possibly different origins, zircon ages indicate that these three groups of rocks were coevally emplaced at similar to 305 Ma.
WOS关键词	PHANEROZOIC CRUSTAL GROWTH ; ASIAN OROGENIC BELT ; NEOPROTEROZOIC ADAKITIC PLUTONS ; TRONDHJEMITE-GRANODIORITE TTG ; LOWER CONTINENTAL-CRUST ; THICKENED LOWER CRUST ; SLAB-DERIVED MELTS ; NORTHERN XINJIANG ; NW CHINA ; TECTONIC EVOLUTION
WOS研究方向	Geochemistry & Geophysics
语种	英语
WOS记录号	WOS:000270346400023
出版者	ELSEVIER SCIENCE BV
资助机构	National Basic Research Program of China(2007CB411308) ; National Basic Research Program of China(2007CB411308) ; Hong Kong Research Grants Council(HKU7043/07P) ; Hong Kong Research Grants Council(HKU7043/07P) ; CAS/SAFEA International Partnership Program form Creative Research Teams ; CAS/SAFEA International Partnership Program form Creative Research Teams ; National Natural Science Foundation of China(40725009) ; National Natural Science Foundation of China(40725009) ; National Basic Research Program of China(2007CB411308) ; National Basic Research Program of China(2007CB411308) ; Hong Kong Research Grants Council(HKU7043/07P) ; Hong Kong Research Grants Council(HKU7043/07P) ; CAS/SAFEA International Partnership Program form Creative Research Teams ; CAS/SAFEA International Partnership Program form Creative Research Teams ; National Natural Science Foundation of China(40725009) ; National Natural Science Foundation of China(40725009) ; National Basic Research Program of China(2007CB411308) ; National Basic Research Program of China(2007CB411308) ; Hong Kong Research Grants Council(HKU7043/07P) ; Hong Kong Research Grants Council(HKU7043/07P) ; CAS/SAFEA International Partnership Program form Creative Research Teams ; CAS/SAFEA International Partnership Program form Creative Research Teams ; National Natural Science Foundation of China(40725009) ; National Natural Science Foundation of China(40725009) ; National Basic Research Program of China(2007CB411308) ; National Basic Research Program of China(2007CB411308) ; Hong Kong Research Grants Council(HKU7043/07P) ; Hong Kong Research Grants Council(HKU7043/07P) ; CAS/SAFEA International Partnership Program form Creative Research Teams ; CAS/SAFEA International Partnership Program form Creative Research Teams ; National Natural Science Foundation of China(40725009) ; National Natural Science Foundation of China(40725009)
源URL	[http://ir.iggcas.ac.cn/handle/132A11/70592]
专题	中国科学院地质与地球物理研究所
通讯作者	Sun, Min
作者单位	1.Univ Hong Kong, Dept Earth Sci, Hong Kong, Hong Kong, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Geochem, Key Lab Isotope Geochronol & Geochem, Guangzhou 510640, Guangdong, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 4.Peking Univ, Sch Earth & Space Sci, Beijing 100871, Peoples R China
推荐引用方式 GB/T 7714	Geng, Hongyan,Sun, Min,Yuan, Chao,et al. Geochemical, Sr-Nd and zircon U-Pb-Hf isotopic studies of Late Carboniferous magmatism in the West Junggar, Xinjiang: Implications for ridge subduction?[J]. CHEMICAL GEOLOGY,2009,266(3-4):364-389.
APA	Geng, Hongyan.,Sun, Min.,Yuan, Chao.,Xiao, Wenjiao.,Xian, Weisheng.,...&Wu, Fuyuan.(2009).Geochemical, Sr-Nd and zircon U-Pb-Hf isotopic studies of Late Carboniferous magmatism in the West Junggar, Xinjiang: Implications for ridge subduction?.CHEMICAL GEOLOGY,266(3-4),364-389.
MLA	Geng, Hongyan,et al."Geochemical, Sr-Nd and zircon U-Pb-Hf isotopic studies of Late Carboniferous magmatism in the West Junggar, Xinjiang: Implications for ridge subduction?".CHEMICAL GEOLOGY 266.3-4(2009):364-389.

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来源：地质与地球物理研究所

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Geochemical, Sr-Nd and zircon U-Pb-Hf isotopic studies of Late Carboniferous magmatism in the West Junggar, Xinjiang: Implications for ridge subduction?

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