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Termination of the Paleo-Asian Ocean in the Beishan orogen, NW China: Constraints from detrital zircon U-Pb age and Hf isotope analysis of turbidites

文献类型：期刊论文

作者Guo, Qian-Qian1,5; Chung, Sun-Lin1,2; Lee, Hao-Yang2; Xiao, Wen-Jiao3,4; Hou, Quan-Lin3,5
刊名GEOLOGICAL SOCIETY OF AMERICA BULLETIN
出版日期2023-07-01
卷号135期号:7-8页码:1734-1746
ISSN号0016-7606
DOI10.1130/B36455.1
英文摘要The termination of the Paleo-Asian Ocean, including duration and architecture, is controversial and has led to different reconstructions of the Central Asian orogenic belt. Deep-marine turbidites are of great significance in constraining the evolution of the oceanic basin. The youngest marine turbidites in the Beishan orogen in the central part of the southern Central Asian orogenic belt are separated by the Liuyuan melange into two sections, the South turbidites and North turbidites. Detrital zircon grains from South turbidites yielded a maximum depositional age of 255 Ma. Those from North turbidites yielded a maximum depositional age of 254 Ma. Most of the Precambrian zircons of South turbidites have concentrated e(Hf)(t) values (-6 to -2.6), whereas those of North turbidites range from -12.6 to +10.4, indicating different provenances. The North turbidites also have more positive whole-rock eNd(t) values (-0.5 to +1.1) than the South turbidites (-4.2 to -2.4), suggesting more juvenile or less evolved crustal components in the source. Detailed comparison of the detrital zircon ages and Hf-Nd isotopic characteristics with igneous and metamorphic rocks in the south Beishan area distinguishes two sources. These findings constrain the Liuyuan suture as the latest suture in the Beishan region, occurring no earlier than 254 Ma. The youngest peak age of detrital zircons of the youngest marine sedimentary rocks in the southern Central Asian orogenic belt becomes younger eastward from 288 Ma to 247 Ma, characterizing the closure duration of the Paleo-Asian Ocean from west to east in similar to 40 m.y. This study finds that the youngest turbidites in the Beishan orogen not only record sedimentary processes in response to the final episode of orogenic evolution in the southern Central Asian orogenic belt, but they also constrain how and when an archipelago-type accretionary orogen terminated.
WOS关键词SOLONKER SUTURE ZONE ; ACCRETIONARY OROGENESIS ; TECTONIC EVOLUTION ; CRUSTAL EVOLUTION ; INNER-MONGOLIA ; DUNHUANG BLOCK ; CONTINENTAL GROWTH ; TARIM CRATON ; LU-HF ; BELT
资助项目National Natural Science Foundation of China[41888101] ; National Natural Science Foundation of China[41672215] ; National Natural Science Foundation of China[41230207] ; National Natural Science Foundation of China[41302177]
WOS研究方向Geology
语种英语
出版者GEOLOGICAL SOC AMER, INC
WOS记录号WOS:001051738600001
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; National Natural Science Foundation of China
源URL[http://ir.iggcas.ac.cn/handle/132A11/111420]  
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Guo, Qian-Qian
作者单位1.Natl Taiwan Univ, Dept Geosci, Taipei 10617, Taiwan
2.Acad Sinica, Inst Earth Sci, Taipei 11529, Taiwan
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.Chinese Acad Sci, Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China
5.Univ Chinese Acad Sci, Key Lab Computat Geodynam, Beijing 100049, Peoples R China
推荐引用方式
GB/T 7714		 Guo, Qian-Qian,Chung, Sun-Lin,Lee, Hao-Yang,et al. Termination of the Paleo-Asian Ocean in the Beishan orogen, NW China: Constraints from detrital zircon U-Pb age and Hf isotope analysis of turbidites[J]. GEOLOGICAL SOCIETY OF AMERICA BULLETIN,2023,135(7-8):1734-1746.
APA Guo, Qian-Qian,Chung, Sun-Lin,Lee, Hao-Yang,Xiao, Wen-Jiao,&Hou, Quan-Lin.(2023).Termination of the Paleo-Asian Ocean in the Beishan orogen, NW China: Constraints from detrital zircon U-Pb age and Hf isotope analysis of turbidites.GEOLOGICAL SOCIETY OF AMERICA BULLETIN,135(7-8),1734-1746.
MLA Guo, Qian-Qian,et al."Termination of the Paleo-Asian Ocean in the Beishan orogen, NW China: Constraints from detrital zircon U-Pb age and Hf isotope analysis of turbidites".GEOLOGICAL SOCIETY OF AMERICA BULLETIN 135.7-8(2023):1734-1746.

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来源：地质与地球物理研究所

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