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ARCHITECTURE AND EVOLUTION OF ACCRETIONARY OROGENS IN THE ALTAIDS COLLAGE: THE EARLY PALEOZOIC WEST JUNGGAR (NW CHINA)

文献类型：期刊论文

作者Choulet, Flavien1,2,3; Faure, Michel1,2,3; Cluzel, Dominique4; Chen, Yan1,2,3; Lin, Wei5; Wang, Bo6; Jahn, Bor-Ming7
刊名AMERICAN JOURNAL OF SCIENCE
出版日期2012-12-01
卷号312期号:10页码:1098-1145
关键词West Junggar Early Paleozoic Hf isotopes U-Pb geochronology detrital zircon accretionary orogens
ISSN号0002-9599
DOI10.2475/10.2012.02
文献子类Article
英文摘要Understanding the development and evolution of accretionary orogens is crucial for characterizing continental crust growth in time and space. In the Altaids tectonic collage of Central Asia, conflicting geodynamic models have been proposed about the Paleozoic evolution, during which juvenile continental crust has been extensively formed. This study focuses on West Junggar (NW China), a key region that has not been extensively studied yet. A multidisciplinary approach, including detrital zircon provenance study, geochemistry, and field structural analysis, provides new constraints on the evolution of three Early Paleozoic units of West Junggar. Oceanic subduction predominates in Early Paleozoic time, as indicated by ophiolitic melanges, fore-arc volcaniclastic turbidites and magmatic arc suites. However, the development of an olistostrome supplied by a sub-contemporaneous carbonate platform, the occurrence of continental molasse, and the chronology and geochemistry of magmatic events reveal interruptions of subduction. Discrete collisions of volcanic arcs and micro-continent are inferred from the tectonic structure of the belt, which displays allochthonous units rooted in the suture zone. Early Paleozoic magmatic and sedimentary rocks of West Junggar bear some resemblance to contemporaneous analogues in Eastern Kazakhstan, and suggest a lateral connection. On the basis of these new results, we propose a geodynamic evolution in four steps: 1) Early to Middle Ordovician intra-oceanic subduction forming island arcs, 2) Late Ordovician tectonic accretion of island arcs against the Kazakhstan continental margin, 3) Early to Middle Silurian resumption of subduction and active continental margin magmatism, and 4) Late Silurian-Early Devonian micro-continent collision. This scenario, consistent with the formation of the Kazakhstan Block, supports a model of multiple episodic accretions for the Altaids tectonic collage rather than a continuous continental margin evolution. These results also suggest that, in Central Asia, continental crust growth results from alternating vertical and horizontal growth episodes throughout the Paleozoic.
WOS关键词PHANEROZOIC CRUSTAL GROWTH ; ZIRCON U-PB ; ND ISOTOPIC EVIDENCE ; PACIFIC-TYPE OROGENY ; CENTRAL-ASIA ; CONTINENTAL-CRUST ; TECTONIC EVOLUTION ; NORTH XINJIANG ; CENTRAL KAZAKSTAN ; GEOLOGICAL SIGNIFICANCE
WOS研究方向Geology
语种英语
WOS记录号WOS:000319305900002
出版者AMER JOURNAL SCIENCE
资助机构National Basic Research Program of China (973 Project)(2009CB825008 ; National Basic Research Program of China (973 Project)(2009CB825008 ; Chinese National ST Major Project(2008ZX05008) ; Chinese National ST Major Project(2008ZX05008) ; project "Paleomagnitic study on the tectonic and paleogeographic evolution of northwest of China" ; project "Paleomagnitic study on the tectonic and paleogeographic evolution of northwest of China" ; SINOPEC ; SINOPEC ; National Nature Science Foundation of China(40821002 ; National Nature Science Foundation of China(40821002 ; French Ministere de l'Enseignement Superieur et de la Recherche ; French Ministere de l'Enseignement Superieur et de la Recherche ; 2007CB411301) ; 2007CB411301) ; 40802043) ; 40802043) ; National Basic Research Program of China (973 Project)(2009CB825008 ; National Basic Research Program of China (973 Project)(2009CB825008 ; Chinese National ST Major Project(2008ZX05008) ; Chinese National ST Major Project(2008ZX05008) ; project "Paleomagnitic study on the tectonic and paleogeographic evolution of northwest of China" ; project "Paleomagnitic study on the tectonic and paleogeographic evolution of northwest of China" ; SINOPEC ; SINOPEC ; National Nature Science Foundation of China(40821002 ; National Nature Science Foundation of China(40821002 ; French Ministere de l'Enseignement Superieur et de la Recherche ; French Ministere de l'Enseignement Superieur et de la Recherche ; 2007CB411301) ; 2007CB411301) ; 40802043) ; 40802043) ; National Basic Research Program of China (973 Project)(2009CB825008 ; National Basic Research Program of China (973 Project)(2009CB825008 ; Chinese National ST Major Project(2008ZX05008) ; Chinese National ST Major Project(2008ZX05008) ; project "Paleomagnitic study on the tectonic and paleogeographic evolution of northwest of China" ; project "Paleomagnitic study on the tectonic and paleogeographic evolution of northwest of China" ; SINOPEC ; SINOPEC ; National Nature Science Foundation of China(40821002 ; National Nature Science Foundation of China(40821002 ; French Ministere de l'Enseignement Superieur et de la Recherche ; French Ministere de l'Enseignement Superieur et de la Recherche ; 2007CB411301) ; 2007CB411301) ; 40802043) ; 40802043) ; National Basic Research Program of China (973 Project)(2009CB825008 ; National Basic Research Program of China (973 Project)(2009CB825008 ; Chinese National ST Major Project(2008ZX05008) ; Chinese National ST Major Project(2008ZX05008) ; project "Paleomagnitic study on the tectonic and paleogeographic evolution of northwest of China" ; project "Paleomagnitic study on the tectonic and paleogeographic evolution of northwest of China" ; SINOPEC ; SINOPEC ; National Nature Science Foundation of China(40821002 ; National Nature Science Foundation of China(40821002 ; French Ministere de l'Enseignement Superieur et de la Recherche ; French Ministere de l'Enseignement Superieur et de la Recherche ; 2007CB411301) ; 2007CB411301) ; 40802043) ; 40802043)
源URL[http://ir.iggcas.ac.cn/handle/132A11/84544]  
专题中国科学院地质与地球物理研究所
通讯作者Choulet, Flavien
作者单位1.Univ Orleans, ISTO, UMR 7327, F-45071 Orleans 2, France
2.CNRS, INSU, ISTO, UMR 7327, F-45071 Orleans, France
3.Bur Rech Geol & Minieres, ISTO, UMR 7327, F-45060 Orleans, France
4.Univ Nouvelle Caledonie, Pole Pluridisciplinaire Mat & Environm EA 3325, Noumea 98851, New Caledonia
5.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
6.Nanjing Univ, Dept Earth Sci, Nanjing 210008, Jiangsu, Peoples R China
7.Natl Taiwan Univ, Dept Geosci, Taipei 10764, Taiwan
推荐引用方式
GB/T 7714		 Choulet, Flavien,Faure, Michel,Cluzel, Dominique,et al. ARCHITECTURE AND EVOLUTION OF ACCRETIONARY OROGENS IN THE ALTAIDS COLLAGE: THE EARLY PALEOZOIC WEST JUNGGAR (NW CHINA)[J]. AMERICAN JOURNAL OF SCIENCE,2012,312(10):1098-1145.
APA Choulet, Flavien.,Faure, Michel.,Cluzel, Dominique.,Chen, Yan.,Lin, Wei.,...&Jahn, Bor-Ming.(2012).ARCHITECTURE AND EVOLUTION OF ACCRETIONARY OROGENS IN THE ALTAIDS COLLAGE: THE EARLY PALEOZOIC WEST JUNGGAR (NW CHINA).AMERICAN JOURNAL OF SCIENCE,312(10),1098-1145.
MLA Choulet, Flavien,et al."ARCHITECTURE AND EVOLUTION OF ACCRETIONARY OROGENS IN THE ALTAIDS COLLAGE: THE EARLY PALEOZOIC WEST JUNGGAR (NW CHINA)".AMERICAN JOURNAL OF SCIENCE 312.10(2012):1098-1145.

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