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  4. 岩石圈演化国家重点实验室
Crustal thickness and composition in the South China Block: Constraints from earthquake receiver function

文献类型：期刊论文

作者Chen, Changxin5,6,7; Lu, Qingtian6,7; Chen, Ling2,3,4; Shi, Danian6,7; Yan, Jiayong6,7; Ai, Yinshuang1,2
刊名SCIENCE CHINA-EARTH SCIENCES
出版日期2022-01-11
页码16
关键词P wave receiver function The South China Block Crustal thickness Crustal composition Block boundary
ISSN号1674-7313
DOI10.1007/s11430-021-9858-x
英文摘要Crustal thickness and composition are closely related to geology and tectonic evolution of the region. Studying the differences in the crustal thickness and composition of the South China Block (SCB) is important to gain a comprehensive understanding of multi-phase amalgamation, breakup, reworking, and regional geodynamic processes. In this study, teleseismic data from 135 high-density portable broadband stations from SinoProbe were processed using Common Conversion Point (CCP) stacking and H-kappa stacking methods. The Moho depth and P-wave and S-wave velocity ratio (V-p/V-s) were studied. Our results revealed several insights about the tectonic processes in the SCB. First, the crustal structure and V-p/V-s ratios of the Cathaysia Block, Jiangnan Orogenic Belt, and Yangtze Block were significantly different. The average depth of the Moho in the Cathaysia Block was approximately 31 km, and the V-p/V-s ratios increased from the inland area (1.66) to the coastal area (1.78), indicating the oceanward increase of mafic proportion in the lower crust, which is related to the influence of the Paleo-Pacific Plate westward subduction. Second, the crustal thickness of Jiangnan Orogenic Belt deepens from east ca. 31 to the west ca. 42 km and the V-p/V-s ratios varied from 1.75 to 1.64, illustrating a relatively felsic crust, which could have been related to the Mesozoic upper crustal thickening under compression followed by the lower crust removal under the extensional background. Third, the average crustal thickness of the Yangtze Block was 42 km, and the V-p/V-s ratios ranged from 1.64 to 1.84, presenting a positive correlation between the Moho depth and the V-p/V-s ratio, which is explained by the relatively thick mafic lower crust. Based on the variations in the crustal structure and V-p/V-s ratios of the profile, we inferred that the central part of the Jiangnan Orogenic Belt was bounded by the Jiangshan-Shaoxing-Hengyang in the east and the Jiujiang-Shitai-Jishou in the west. The small-scale Moho depth undulations at the intersection of the Cathaysia Block and the Jiangnan Orogenic Belt could be related to the Mesozoic compression-extension geodynamic transformation.
WOS关键词YANGTZE METALLOGENIC BELT ; JIANGNAN OROGEN ; TECTONIC EVOLUTION ; SOUTHEASTERN CHINA ; CONTINENTAL-CRUST ; STRUCTURE BENEATH ; CATHAYSIA BLOCKS ; MOHO DEPTH ; LITHOSPHERIC STRUCTURE ; VELOCITY STRUCTURE
资助项目National Natural Science Foundation of China[41630320] ; National Natural Science Foundation of China[92062108] ; China Geological Survey Project[DD20190012] ; open fund from the Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resource, Institute of Geology, Chinese Academy of Geological Sciences[J1901-16]
WOS研究方向Geology
语种英语
WOS记录号WOS:000742574700001
出版者SCIENCE PRESS
资助机构National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey Project ; China Geological Survey Project ; open fund from the Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resource, Institute of Geology, Chinese Academy of Geological Sciences ; open fund from the Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resource, Institute of Geology, Chinese Academy of Geological Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey Project ; China Geological Survey Project ; open fund from the Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resource, Institute of Geology, Chinese Academy of Geological Sciences ; open fund from the Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resource, Institute of Geology, Chinese Academy of Geological Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey Project ; China Geological Survey Project ; open fund from the Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resource, Institute of Geology, Chinese Academy of Geological Sciences ; open fund from the Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resource, Institute of Geology, Chinese Academy of Geological Sciences ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; China Geological Survey Project ; China Geological Survey Project ; open fund from the Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resource, Institute of Geology, Chinese Academy of Geological Sciences ; open fund from the Key Laboratory of Deep-Earth Dynamics of Ministry of Natural Resource, Institute of Geology, Chinese Academy of Geological Sciences
源URL[http://ir.iggcas.ac.cn/handle/132A11/103985]  
专题地质与地球物理研究所_岩石圈演化国家重点实验室
地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者Lu, Qingtian
作者单位1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing 100029, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
3.CAS Ctr Excellence Deep Earth Sci, Guangzhou 510640, Peoples R China
4.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
5.Chinese Acad Geol Sci, Inst Geol, Key Lab Deep Earth Dynam Minist Nat Resources, Beijing 100037, Peoples R China
6.Chinese MNR Lab Deep Earth Sci & Technol, Beijing 100094, Peoples R China
7.Chinese Acad Geol Sci, Beijing 100037, Peoples R China
推荐引用方式
GB/T 7714		 Chen, Changxin,Lu, Qingtian,Chen, Ling,et al. Crustal thickness and composition in the South China Block: Constraints from earthquake receiver function[J]. SCIENCE CHINA-EARTH SCIENCES,2022:16.
APA Chen, Changxin,Lu, Qingtian,Chen, Ling,Shi, Danian,Yan, Jiayong,&Ai, Yinshuang.(2022).Crustal thickness and composition in the South China Block: Constraints from earthquake receiver function.SCIENCE CHINA-EARTH SCIENCES,16.
MLA Chen, Changxin,et al."Crustal thickness and composition in the South China Block: Constraints from earthquake receiver function".SCIENCE CHINA-EARTH SCIENCES (2022):16.

入库方式： OAI收割

来源：地质与地球物理研究所

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