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  2. 地质与地球物理研究所
  3. 中国科学院地质与地球物理研究所
  4. 岩石圈演化国家重点实验室
Teleseismic traveltime tomography of the Andaman subduction zone

文献类型：期刊论文

作者Zhang, Haodong4; Liu, Shaolin3,4; Yang, Dinghui2; Xu, Xiwei4; Yang, Shuxin4; Wang, Wenshuai1; Pan, Yang4
刊名TECTONOPHYSICS
出版日期2023-07-05
卷号858页码:13
ISSN号0040-1951
关键词Andaman Sea Subducted slab Teleseismic tomography P -wave velocity Indian plate
DOI10.1016/j.tecto.2023.229884
英文摘要The Andaman subduction zone is characterized by great earthquakes and strong tectonic activity, which are closely related to the subduction of the Indian plate. To gain insight into the subduction processes, the geometry of the downgoing Indian plate must be investigated. At present, the geometry of the subducting Indian plate remains unclear owing to the historical lack of a seismic network deployed in the Andaman Sea and the sur-rounding area. In this study, we employed a teleseismic traveltime tomography method to image the deep structures beneath the Andaman Sea. The principle of the tomography method is that regional earthquakes are regarded as seismic stations, and seismic stations at teleseismic distances are treated as teleseismic events based on the reciprocity theorem. With this type of teleseismic traveltime tomography, we selected a total of 179 regional earthquakes that were recorded by 4515 stations, and we manually selected 40,369 high-quality P-wave first arrivals. From the inversion of these seismic traveltime data, we obtain P-wave images at depths from 300 km to 700 km. Our tomographic images reveal three distinct features. First, we observe high-velocity anomalies beneath the Andaman Sea at depths of 300-700 km. The orientation of the high-velocity anomalies is nearly consistent with that of the Andaman trench and volcanic arc. The high-velocity anomalies in the upper mantle are laterally discontinuous; a gap at approximately 9 degrees N divides the high-velocity anomalies into two parts. Second, high-velocity anomalies are found in the mantle transition zone (MTZ) below the Andaman trench. Third, strong low-velocity anomalies are detected below the volcanic group in the Mergui Basin. Based on our tomographic results, we infer the currently subducting Indian plate beneath the Andaman Sea, an ancient slab segment in the MTZ, and upwelling hot materials below the Mergui Basin.
WOS关键词SEISMIC TOMOGRAPHY ; SLAB BENEATH ; MANTLE ; EVOLUTION ; CRUSTAL ; RECONSTRUCTIONS ; SUMATRA ; HISTORY ; REGION ; FAULT
资助项目National Institute of Natural Hazards, Ministry of Emergency Management of China[ZDJ2019-18] ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences[SKL-K202101] ; Beijing Natural Science Foundation[8222033] ; National Natural Science Foundation of China[42174111] ; National Natural Science Foundation of China[42064004] ; National Natural Science Foundation of China[U1839206] ; National Natural Science Foundation of China[U1839206]
WOS研究方向Geochemistry & Geophysics
语种英语
出版者ELSEVIER
WOS记录号WOS:001001311000001
资助机构National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; 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 ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; 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 ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; 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 ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; National Institute of Natural Hazards, Ministry of Emergency Management of China ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; State Key Laboratory of Lithospheric Evolution, Institute of Geology and Geophysics, Chinese Academy of Sciences ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; Beijing Natural Science Foundation ; 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/132A11/110993]  
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Liu, Shaolin
作者单位1.Ningxia Univ, Sch Math & Stat, Yinchuan 750021, Peoples R China
2.Tsinghua Univ, Dept Math Sci, Beijing 100084, Peoples R China
3.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
4.Minist Emergency Management, Natl Inst Nat Hazards, Beijing 100085, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Haodong,Liu, Shaolin,Yang, Dinghui,et al. Teleseismic traveltime tomography of the Andaman subduction zone[J]. TECTONOPHYSICS,2023,858:13.
APA Zhang, Haodong.,Liu, Shaolin.,Yang, Dinghui.,Xu, Xiwei.,Yang, Shuxin.,...&Pan, Yang.(2023).Teleseismic traveltime tomography of the Andaman subduction zone.TECTONOPHYSICS,858,13.
MLA Zhang, Haodong,et al."Teleseismic traveltime tomography of the Andaman subduction zone".TECTONOPHYSICS 858(2023):13.

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来源：地质与地球物理研究所

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