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Zircon Ages of Metasedimentary Rocks in the Wuwamen Ophiolitic Melange, Chinese South Tianshan: Implications for the Paleozoic Subduction-Accretion in the Southern Central Asian Orogenic Belt

文献类型：期刊论文

作者Wang, Xin-Shui1; Yang, Fei2; Klemd, Reiner3; Jiang, Tuo4; Gao, Jun5
刊名JOURNAL OF EARTH SCIENCE
出版日期2022-10-01
卷号33期号:5页码:1059-1071
关键词high-temperature high-pressure metamorphism Zircon U-Pb ophiolitic melange subduction Tianshan CAOB geochemistry
ISSN号1674-487X
DOI10.1007/s12583-022-1695-0
英文摘要High-temperature and high-pressure (high-grade) metamorphic complexes of variable ages are common in the Central Asian orogenic belt (CAOB), and their precise geochronology and origin are essential to unravel the orogenic architecture and crust-production rate of the CAOB. Hereby it is essential to differentiate between pre-orogenic Precambrian basement and Paleozoic arc-accretionary complexes. This study provides precise in situ zircon U-Pb ages for the metasedimentary rocks in the Wuwamen ophiolitic melange, which is traditionally thought to represent the pre-orogenic basement of the southwestern CAOB. A meta-sandstone from the meta-flysch sequence revealed a widespread ca. 1.8 Ga high-grade metamorphic overprint similar to that of the underlying orthogneisses and, thus, was interpreted to represent pre-orogenic basement fragments that occur as tectonic blocks in the Paleozoic ophiolitic melange. In contrast, a schist from the melange matrix is characterized by a ca. 333 Ma high-grade metamorphic overprint, indicating that the northward subduction of the South Tianshan Ocean was still active at this time. The thrust-imbricated high-grade metamorphic rocks of contrasting origins in an accretionary complex have important implications for the understanding the accretionary history and crustal growth of the CAOB. Furthermore, the strongly deformed ophiolitic melange was intruded by an undeformed granite dyke with an emplacement age younger than ca. 294 Ma, thus providing a minimum age limit for the final closure of the South Tianshan Ocean.
WOS关键词OCEAN PLATE STRATIGRAPHY ; HF ISOTOPE RECORD ; U-PB AGES ; WESTERN TIANSHAN ; NW CHINA ; CONTINENTAL GROWTH ; CRUSTAL EVOLUTION ; SW TIANSHAN ; GEOCHRONOLOGICAL EVIDENCE ; PRECAMBRIAN EVOLUTION
资助项目National Natural Science Foundation of China[42072079] ; National Natural Science Foundation of China[42172234] ; National Natural Science Foundation of China[41902232] ; China Geological Survey[DD20190060]
WOS研究方向Geology
语种英语
WOS记录号WOS:000869882500001
出版者CHINA UNIV GEOSCIENCES, WUHAN
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey ; China Geological Survey
源URL[http://ir.iggcas.ac.cn/handle/132A11/107785]  
专题地质与地球物理研究所_中国科学院矿产资源研究重点实验室
通讯作者Wang, Xin-Shui
作者单位1.China Univ Geosci, Sch Earth Sci, Wuhan 430074, Peoples R China
2.Guangzhou Urban Planning & Design Survey Res Inst, Guangzhou 510060, Peoples R China
3.Friedrich Alexander Univ Erlangen Nurnberg, GeoZentrum Nordbayern, Schlossgarten 5a, D-91054 Erlangen, Germany
4.China Geol Survey, Lab Isotope Geochem, Wuhan Ctr, Wuhan 430205, Peoples R China
5.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Mineral Resources, Beijing 100029, Peoples R China
推荐引用方式
GB/T 7714		 Wang, Xin-Shui,Yang, Fei,Klemd, Reiner,et al. Zircon Ages of Metasedimentary Rocks in the Wuwamen Ophiolitic Melange, Chinese South Tianshan: Implications for the Paleozoic Subduction-Accretion in the Southern Central Asian Orogenic Belt[J]. JOURNAL OF EARTH SCIENCE,2022,33(5):1059-1071.
APA Wang, Xin-Shui,Yang, Fei,Klemd, Reiner,Jiang, Tuo,&Gao, Jun.(2022).Zircon Ages of Metasedimentary Rocks in the Wuwamen Ophiolitic Melange, Chinese South Tianshan: Implications for the Paleozoic Subduction-Accretion in the Southern Central Asian Orogenic Belt.JOURNAL OF EARTH SCIENCE,33(5),1059-1071.
MLA Wang, Xin-Shui,et al."Zircon Ages of Metasedimentary Rocks in the Wuwamen Ophiolitic Melange, Chinese South Tianshan: Implications for the Paleozoic Subduction-Accretion in the Southern Central Asian Orogenic Belt".JOURNAL OF EARTH SCIENCE 33.5(2022):1059-1071.

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来源：地质与地球物理研究所

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