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Early-Middle Triassic high Sr/Y granitoids in the southern Central Asian Orogenic Belt: Implications for ocean closure in accretionary orogens

文献类型：期刊论文

作者Li, Shan1,2; Chung, Sun-Lin2,3; Wilde, Simon A.4; Jahn, Bor-Ming2; Xiao, Wen-Jiao5; Wang, Tao1; Guo, Qian-Qian6
刊名JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
出版日期2017-03-01
卷号122期号:3页码:2291-2309
ISSN号2169-9313
关键词Paleo-asian Ocean High Sr y Granitoids Ocean Closure Accretionary Orogen Collision Central Asian Orogenic Belt
DOI10.1002/2017JB014006
文献子类Article
英文摘要The key to defining the termination of accretion in an accretionary orogen is to recognize the initial magmatic processes that are generated at the time of ocean closure. We present new age, geochemical, and isotopic data for magmatic rocks related to terminal collision along the Solonker-Xar Moron suture zone in the southern Central Asian Orogenic Belt (CAOB) that record such processes following closure of the Paleo-Asian Ocean. These magmatic rocks were emplaced in the Early-Middle Triassic (251-245Ma) and show high Sr/Y signatures. Their low MgO, Cr, and Ni contents and variable whole-rock epsilon(Nd)(t) values (+5.8 to -5.3), together with the range in zircon epsilon(Hf)(t) (+15.6 to -9.8) and O-18 values (5.1 to 7.9), indicate an origin from partial melting of juvenile lower crustal rocks with some old components, including supracrustal recycling under garnet amphibolite facies conditions. Our data, along with available geological and geophysical evidence, lead us to propose a model of final oceanic contraction in the southern CAOB, resulting in sublinear distribution of high Sr/Y melts along the resultant collision zone, thus defining the onset of postaccretionary processes in the southern CAOB. The identification of collision-related high Sr/Y granitoids from the southern CAOB not only reveals the magmatic process in response to the final episode of orogenic evolution in the CAOB accretionary collision zone but also constrains how and when an archipelago-type accretionary orogen is terminated.
WOS关键词SOLONKER SUTURE ZONE ; CONTINENTAL COLLISION ZONES ; NATURAL REFERENCE MATERIAL ; NORTH CHINA CRATON ; INNER-MONGOLIA ; U-PB ; NE CHINA ; CRUSTAL GROWTH ; TECTONIC IMPLICATIONS ; SUBDUCTION-ACCRETION
WOS研究方向Geochemistry & Geophysics
语种英语
出版者AMER GEOPHYSICAL UNION
WOS记录号WOS:000399660300040
资助机构Major State Basic Research Program of China(2013CB429803) ; MOST China(2016YFC0600401) ; National Natural Science Foundation of China(41402194 ; China Postdoctoral Foundation(2015T81073) ; CAGS Research Fund(YYWF201701) ; China Geological Survey(12120113013700 ; (NSC 103-2811-M-002-029) ; 41390441 ; 12120113013800) ; 41230207 ; 41302177) ; Major State Basic Research Program of China(2013CB429803) ; MOST China(2016YFC0600401) ; National Natural Science Foundation of China(41402194 ; China Postdoctoral Foundation(2015T81073) ; CAGS Research Fund(YYWF201701) ; China Geological Survey(12120113013700 ; (NSC 103-2811-M-002-029) ; 41390441 ; 12120113013800) ; 41230207 ; 41302177) ; Major State Basic Research Program of China(2013CB429803) ; MOST China(2016YFC0600401) ; National Natural Science Foundation of China(41402194 ; China Postdoctoral Foundation(2015T81073) ; CAGS Research Fund(YYWF201701) ; China Geological Survey(12120113013700 ; (NSC 103-2811-M-002-029) ; 41390441 ; 12120113013800) ; 41230207 ; 41302177) ; Major State Basic Research Program of China(2013CB429803) ; MOST China(2016YFC0600401) ; National Natural Science Foundation of China(41402194 ; China Postdoctoral Foundation(2015T81073) ; CAGS Research Fund(YYWF201701) ; China Geological Survey(12120113013700 ; (NSC 103-2811-M-002-029) ; 41390441 ; 12120113013800) ; 41230207 ; 41302177)
源URL[http://ir.iggcas.ac.cn/handle/132A11/52895]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
通讯作者Li, Shan
作者单位1.Chinese Acad Geol Sci, Inst Geol, Beijing, Peoples R China
2.Natl Taiwan Univ, Dept Geosci, Taipei, Taiwan
3.Acad Sinica, Inst Earth Sci, Taipei, Taiwan
4.Curtin Univ, Dept Appl Geol, Perth, WA, Australia
5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing, Peoples R China
6.Univ Chinese Acad Sci, Key Lab Computat Geodynam, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Li, Shan,Chung, Sun-Lin,Wilde, Simon A.,et al. Early-Middle Triassic high Sr/Y granitoids in the southern Central Asian Orogenic Belt: Implications for ocean closure in accretionary orogens[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,2017,122(3):2291-2309.
APA Li, Shan.,Chung, Sun-Lin.,Wilde, Simon A..,Jahn, Bor-Ming.,Xiao, Wen-Jiao.,...&Guo, Qian-Qian.(2017).Early-Middle Triassic high Sr/Y granitoids in the southern Central Asian Orogenic Belt: Implications for ocean closure in accretionary orogens.JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH,122(3),2291-2309.
MLA Li, Shan,et al."Early-Middle Triassic high Sr/Y granitoids in the southern Central Asian Orogenic Belt: Implications for ocean closure in accretionary orogens".JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH 122.3(2017):2291-2309.

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来源：地质与地球物理研究所

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