Crustal P wave velocity structure beneath the SE margin of the Tibetan Check for Plateau from Deep Seismic Sounding results
文献类型:期刊论文
作者 | Lin, Jiyan1,2,3; Mooney, Walter D.4; Wang, Fuyun3; Duan, Yonghong3; Tian, Xiaofeng3; Xu, Tao1,5; Deng, Youguo6 |
刊名 | TECTONOPHYSICS
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出版日期 | 2019-03-20 |
卷号 | 755页码:109-126 |
关键词 | SE margin Tibet Deep Seismic Sounding P-wave velocity structure Lower crustal flow Deep processes |
ISSN号 | 0040-1951 |
DOI | 10.1016/j.tecto.2019.01.010 |
英文摘要 | The crust and uppermost mantle beneath the southeastern (SE) margin of Tibetan Plateau record the lateral expansion of Tibet and far-field effects from the ongoing continental collision and convergence. In order to obtain constraints on the deep structure and the eastward expansion of the plateau, we synthesized Deep Seismic Sounding (DSS) results in this region and constructed the P wave velocity models for each terrane. The principal characteristics of the crustal velocity model and tectonic significance are: (1) Crustal thickness decreases from 53 km beneath the Songpan-Ganzi terrane (SGT) to 34 km in the south direction beneath Simao terrane (SMT), and 42 km in the east direction beneath Chengdu area. The crust is dominantly felsic in upper crust, with a small percentage of mafic composition in the lower crust. (2) The crustal structure is very heterogeneous in this region. The Indochina Block is characterized by low seismic velocities in the upper crust, while the west Yangtze terrane (WYZT) and SGT show higher velocities in the upper crust. The lower crust beneath WYZT is relatively thicker than other terranes. (3) We deduce that the high velocity in the upper crust and relatively thick lower crust beneath the SGT and WYZT can be associated with magmatic processes that generated the Emeishan flood basalts which may have been triggered by rifting or mantle plume. The lateral variations of the crustal thickness in SE Tibet may be due to lower crustal flow from the Tibetan Plateau to the SE direction after blocked by the cold and rigid Yangtze craton in the east direction. |
WOS关键词 | FINITE-DIFFERENCE CALCULATION ; RIVER FAULT ZONE ; NORTH CHINA ; RECEIVER FUNCTIONS ; SOUTHWEST CHINA ; EASTERN MARGIN ; FLOW PATTERN ; HEAT-FLOW ; DEFORMATION ; CONSTRAINTS |
资助项目 | DREAM project of the National Key R&D Program of China[2016YFC0600402] ; National Key Research and Development Project of China[2016YFC0600302] ; National Natural Science Foundation of China[41774071] ; National Natural Science Foundation of China[41774072] ; National Natural Science Foundation of China[41522401] ; National Natural Science Foundation of China[41774097] ; National Natural Science Foundation of China[41574084] ; China Earthquake Science Experiment[2016CESE0103] |
WOS研究方向 | Geochemistry & Geophysics |
语种 | 英语 |
WOS记录号 | WOS:000463307600009 |
出版者 | ELSEVIER SCIENCE BV |
资助机构 | DREAM project of the National Key R&D Program of China ; DREAM project of the National Key R&D Program of China ; DREAM project of the National Key R&D Program of China ; DREAM project of the National Key R&D Program of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project 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 ; China Earthquake Science Experiment ; China Earthquake Science Experiment ; China Earthquake Science Experiment ; China Earthquake Science Experiment ; DREAM project of the National Key R&D Program of China ; DREAM project of the National Key R&D Program of China ; DREAM project of the National Key R&D Program of China ; DREAM project of the National Key R&D Program of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project 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 ; China Earthquake Science Experiment ; China Earthquake Science Experiment ; China Earthquake Science Experiment ; China Earthquake Science Experiment ; DREAM project of the National Key R&D Program of China ; DREAM project of the National Key R&D Program of China ; DREAM project of the National Key R&D Program of China ; DREAM project of the National Key R&D Program of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project 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 ; China Earthquake Science Experiment ; China Earthquake Science Experiment ; China Earthquake Science Experiment ; China Earthquake Science Experiment ; DREAM project of the National Key R&D Program of China ; DREAM project of the National Key R&D Program of China ; DREAM project of the National Key R&D Program of China ; DREAM project of the National Key R&D Program of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project of China ; National Key Research and Development Project 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 ; China Earthquake Science Experiment ; China Earthquake Science Experiment ; China Earthquake Science Experiment ; China Earthquake Science Experiment |
源URL | [http://ir.iggcas.ac.cn/handle/132A11/91319] ![]() |
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 | Wang, Fuyun |
作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.China Earthquake Adm, Geophys Explorat Ctr, Zhengzhou 450002, Henan, Peoples R China 4.US Geol Survey, 345 Middlefield Rd, Menlo Pk, CA 94025 USA 5.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing 100101, Peoples R China 6.China Univ Geosci, Wuhan 430074, Hubei, Peoples R China |
推荐引用方式 GB/T 7714 | Lin, Jiyan,Mooney, Walter D.,Wang, Fuyun,et al. Crustal P wave velocity structure beneath the SE margin of the Tibetan Check for Plateau from Deep Seismic Sounding results[J]. TECTONOPHYSICS,2019,755:109-126. |
APA | Lin, Jiyan.,Mooney, Walter D..,Wang, Fuyun.,Duan, Yonghong.,Tian, Xiaofeng.,...&Deng, Youguo.(2019).Crustal P wave velocity structure beneath the SE margin of the Tibetan Check for Plateau from Deep Seismic Sounding results.TECTONOPHYSICS,755,109-126. |
MLA | Lin, Jiyan,et al."Crustal P wave velocity structure beneath the SE margin of the Tibetan Check for Plateau from Deep Seismic Sounding results".TECTONOPHYSICS 755(2019):109-126. |
入库方式: OAI收割
来源:地质与地球物理研究所
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