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Geochemical and geochronological studies of granitoid rocks from the Western Tianshan Orogen: Implications for continental growth in the southwestern Central Asian Orogenic Belt

文献类型：期刊论文

作者Long, Lingli1,2,3; Gao, Jun1,2; Klemd, Reiner4; Beier, Christoph4; Qian, Qing1; Zhang, Xi1,2; Wang, Jingbin3; Jiang, Tuo1
刊名LITHOS
出版日期2011-10-01
卷号126期号:3-4页码:321-340
关键词Granitoid rocks Zircon U-Pb age Sr-Nd isotope Continental growth Tianshan
ISSN号0024-4937
DOI10.1016/j.lithos.2011.07.015
文献子类Article
英文摘要The Western Tianshan Orogen in northwestern China is part of the southwestern margin of the Central Asian Orogenic Belt (CAOB), which represents the largest tectonic assembly of accretionary complexes and the most significant area of Phanerozoic continental growth in the world. Granitoid rocks have a widespread occurrence and occupy about 30% of the whole exposure of the orogen. Ages obtained for the granitoids vary from 896 Ma to 247 Ma, while initial Sr-87/Sr-86 ratios vary from 0.70329 to 0.72070 and epsilon(Nd) values from -14.1 to + 7.3. The occurrence of Neoproterozoic granitic gneisses implies the presence of Precambrian basement in this area. During oceanic subduction, continental growth occurred as a result of several combined processes, i.e. by addition of oceanic crustal melts (adakites), the intrusion of basaltic magmas derived by partial melting of the metasomatized depleted mantle wedge and the upwelling of granitic magma derived from a mixed source of basaltic magmas and old continental basement. However, during the post-collisional period, vertical accretion of underplated juvenile mantle material may have been accomplished during 'slab breakoff' delamination. This study suggests a two stage model of continental growth of 'syn-subduction lateral accretion of arc complexes' and 'post-collisional vertical accretion of underplated mantle material', which may also be relevant for the western segment of the CAOB in the Phanerozoic. The reworking and involvement of old crust are more obvious in the Western Tianshan Orogen compared to other parts of the CAOB comprising the Western Junggar, Eastern Junggar, Alataw and Altay terranes. (C) 2011 Elsevier B.V. All rights reserved.
WOS关键词ZIRCON U-PB ; PHANEROZOIC CRUSTAL GROWTH ; PALEOZOIC TECTONIC EVOLUTION ; A-TYPE GRANITES ; NW CHINA IMPLICATIONS ; ND ISOTOPIC EVIDENCE ; KYRGYZ TIEN-SHAN ; NORTHWEST CHINA ; SOUTH TIANSHAN ; AGE-DETERMINATION
WOS研究方向Geochemistry & Geophysics ; Mineralogy
语种英语
WOS记录号WOS:000296822900014
出版者ELSEVIER SCIENCE BV
资助机构State Key Project for Basic Research of China(2007CB411304 ; State Key Project for Basic Research of China(2007CB411304 ; National Natural Science Foundation of China(41025008 ; National Natural Science Foundation of China(41025008 ; China Geological Survey(1212010911070) ; China Geological Survey(1212010911070) ; DFG(KL 692/17-2,3) ; DFG(KL 692/17-2,3) ; 2007CB411302) ; 2007CB411302) ; 40672153 ; 40672153 ; 40721062 ; 40721062 ; 40872057) ; 40872057) ; State Key Project for Basic Research of China(2007CB411304 ; State Key Project for Basic Research of China(2007CB411304 ; National Natural Science Foundation of China(41025008 ; National Natural Science Foundation of China(41025008 ; China Geological Survey(1212010911070) ; China Geological Survey(1212010911070) ; DFG(KL 692/17-2,3) ; DFG(KL 692/17-2,3) ; 2007CB411302) ; 2007CB411302) ; 40672153 ; 40672153 ; 40721062 ; 40721062 ; 40872057) ; 40872057) ; State Key Project for Basic Research of China(2007CB411304 ; State Key Project for Basic Research of China(2007CB411304 ; National Natural Science Foundation of China(41025008 ; National Natural Science Foundation of China(41025008 ; China Geological Survey(1212010911070) ; China Geological Survey(1212010911070) ; DFG(KL 692/17-2,3) ; DFG(KL 692/17-2,3) ; 2007CB411302) ; 2007CB411302) ; 40672153 ; 40672153 ; 40721062 ; 40721062 ; 40872057) ; 40872057) ; State Key Project for Basic Research of China(2007CB411304 ; State Key Project for Basic Research of China(2007CB411304 ; National Natural Science Foundation of China(41025008 ; National Natural Science Foundation of China(41025008 ; China Geological Survey(1212010911070) ; China Geological Survey(1212010911070) ; DFG(KL 692/17-2,3) ; DFG(KL 692/17-2,3) ; 2007CB411302) ; 2007CB411302) ; 40672153 ; 40672153 ; 40721062 ; 40721062 ; 40872057) ; 40872057)
源URL[http://ir.iggcas.ac.cn/handle/132A11/74491]  
专题中国科学院地质与地球物理研究所
通讯作者Gao, Jun
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
2.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, Xinjiang Res Ctr Mineral Resources, Urumqi 830011, Peoples R China
3.Beijing Inst Geol Mineral Resources, Beijing 100012, Peoples R China
4.Univ Erlangen Nurnberg, GeoZentrum Nordbayern, D-91054 Erlangen, Germany
推荐引用方式
GB/T 7714		 Long, Lingli,Gao, Jun,Klemd, Reiner,et al. Geochemical and geochronological studies of granitoid rocks from the Western Tianshan Orogen: Implications for continental growth in the southwestern Central Asian Orogenic Belt[J]. LITHOS,2011,126(3-4):321-340.
APA Long, Lingli.,Gao, Jun.,Klemd, Reiner.,Beier, Christoph.,Qian, Qing.,...&Jiang, Tuo.(2011).Geochemical and geochronological studies of granitoid rocks from the Western Tianshan Orogen: Implications for continental growth in the southwestern Central Asian Orogenic Belt.LITHOS,126(3-4),321-340.
MLA Long, Lingli,et al."Geochemical and geochronological studies of granitoid rocks from the Western Tianshan Orogen: Implications for continental growth in the southwestern Central Asian Orogenic Belt".LITHOS 126.3-4(2011):321-340.

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