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Petrogenesis and tectonic implications of the middle Silurian volcanic rocks in northern West Junggar, NW China

文献类型：期刊论文

作者Yang, Gaoxue1,2; Li, Yongjun1,2; Xiao, Wenjiao3,4; Sun, Yong2; Tong, Lili1,2
刊名INTERNATIONAL GEOLOGY REVIEW
出版日期2014-05-19
卷号56期号:7页码:869-884
关键词zircon U-Pb ages CAOB West Junggar intra-oceanic subduction geochemistry
ISSN号0020-6814
DOI10.1080/00206814.2014.905214
文献子类Article
英文摘要Zircon U-Pb geochronological and geochemical analyses are reported for a suite of the middle Silurian volcanic rocks from northern West Junggar (NW China), southern Central Asian Orogenic Belt (CAOB), with the aim to investigate the sources, petrogenesis, and tectonic implications. Laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) U-Pb analysis from an andesite yielded a concordant weighted mean Pb-206/U-238 age of 429 +/- 3 Ma, indicating the presence of middle Silurian volcanic rocks in northern West Junggar. The andesite is tholeiite series and characterized by minor variations in compositions (SiO2=55.68-59.17wt.%, Al2O3=14.56-17.7wt.%, TiO2=0.55-1.23wt.%, Na2O+K2O=3.46-7.16wt.%, and P2O5=0.15-0.37wt.%), with wider MgO content (2.18-6.48wt.%) and Mg# (57.4-77.9). All andesitic rocks are enriched in large-ion lithophile elements (LILEs; e.g. Rb, Ba, K, and Th) and light rare earth elements (LREEs), but strongly depleted in some high field strength elements (HFSEs; e.g. Nb, Ta and Ti), with slight negative Eu anomalies (Eu/Eu*=0.8-1). These features suggest that the andesitic magmas were derived from 2-8% partial melting of a garnet lherzolite depleted mantle source with subducted sediments metasomatized by slab-derived fluids. Combining the current study with those data in existing literature, we conclude that the middle Silurian volcanic rocks formed in an intra-oceanic subduction setting during consumption of the Irtysh-Zaysan Ocean, and further confirm the eastern extension of the early Palaeozoic Boshchekul-Chingiz volcanic arc of East Kazakhstan in China.
WOS关键词ASIAN OROGENIC BELT ; INTRAOCEANIC SUBDUCTION SYSTEM ; CONTINENTAL-CRUST ; NORTHWEST CHINA ; U-PB ; TRACE-ELEMENT ; GEOCHEMICAL CONSTRAINTS ; SOUTHERN ALTAIDS ; RIDGE SUBDUCTION ; SR-ND
WOS研究方向Geology
语种英语
WOS记录号WOS:000335846000005
出版者TAYLOR & FRANCIS INC
资助机构National Nature Science Foundation of China(41303027 ; National Nature Science Foundation of China(41303027 ; China Geological Survey(1212011120516) ; China Geological Survey(1212011120516) ; 41273033 ; 41273033 ; 41230207 ; 41230207 ; 41390441 ; 41390441 ; 41190075) ; 41190075) ; National Nature Science Foundation of China(41303027 ; National Nature Science Foundation of China(41303027 ; China Geological Survey(1212011120516) ; China Geological Survey(1212011120516) ; 41273033 ; 41273033 ; 41230207 ; 41230207 ; 41390441 ; 41390441 ; 41190075) ; 41190075) ; National Nature Science Foundation of China(41303027 ; National Nature Science Foundation of China(41303027 ; China Geological Survey(1212011120516) ; China Geological Survey(1212011120516) ; 41273033 ; 41273033 ; 41230207 ; 41230207 ; 41390441 ; 41390441 ; 41190075) ; 41190075) ; National Nature Science Foundation of China(41303027 ; National Nature Science Foundation of China(41303027 ; China Geological Survey(1212011120516) ; China Geological Survey(1212011120516) ; 41273033 ; 41273033 ; 41230207 ; 41230207 ; 41390441 ; 41390441 ; 41190075) ; 41190075)
源URL[http://ir.iggcas.ac.cn/handle/132A11/85437]  
专题中国科学院地质与地球物理研究所
通讯作者Yang, Gaoxue
作者单位1.Minist Educ, Key Lab Western Chinas Mineral Resources & Geol E, Xian, Peoples R China
2.Changan Univ, Sch Earth Sci & Resources, Xian, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
4.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Res Ctr Mineral Resources, Urumqi, Peoples R China
推荐引用方式
GB/T 7714		 Yang, Gaoxue,Li, Yongjun,Xiao, Wenjiao,et al. Petrogenesis and tectonic implications of the middle Silurian volcanic rocks in northern West Junggar, NW China[J]. INTERNATIONAL GEOLOGY REVIEW,2014,56(7):869-884.
APA Yang, Gaoxue,Li, Yongjun,Xiao, Wenjiao,Sun, Yong,&Tong, Lili.(2014).Petrogenesis and tectonic implications of the middle Silurian volcanic rocks in northern West Junggar, NW China.INTERNATIONAL GEOLOGY REVIEW,56(7),869-884.
MLA Yang, Gaoxue,et al."Petrogenesis and tectonic implications of the middle Silurian volcanic rocks in northern West Junggar, NW China".INTERNATIONAL GEOLOGY REVIEW 56.7(2014):869-884.

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来源：地质与地球物理研究所

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