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3-D density structure under South China constrained by seismic velocity and gravity data

文献类型：期刊论文

作者Deng, Yangfan1,2; Zhang, Zhongjie2; Badal, Jose3; Fan, Weiming1
刊名TECTONOPHYSICS
出版日期2014-07-13
卷号627页码:159-170
关键词P-wave velocity Bouguer gravity 3-D density model Vp-density laws South China
ISSN号0040-1951
DOI10.1016/j.tecto.2013.07.032
文献子类Article
英文摘要Until now the crustal structure of South China has been studied through 2-D seismic surveys. While informative, the results generated from these surveys cannot be easily interpreted from a regional outlook due to the sparse sampling of the area. In this paper, we have investigated the 3-D density structure of South China based on an integrated dataset, namely: P-wave velocities previously determined from seismic profiles and Bouguer gravity anomalies. The density structure is solved through a robust inversion of Bouguer anomalies with the help of Grav3D software, so that the results can be extended to zones lacking constraints or sufficient deep seismic coverage. The key issues arising from this density analysis shed new lights on South China, as: (I) The Moho depth extracted from the density model is consistent with the information supplied by deep seismic soundings. (2) The linearly increasing density below the eastern part of the Dabie orogenic belt, in a frame of low density at the bottom of the middle crust, is consistent with the speculated dome of relatively high P-wave velocity suggested by previous deep seismic soundings, and understood as a geophysical fossil of the continental collision/extrusion. (3) The Chenzhou-Linwu fault seems to be the southern transection of the boundary between the Yangtze and Cathaysia blocks constrained by our crustal density model. (4) Different laws formulated as linear relationships between seismic velocity and density allow distinguishing the tectonic units forming South China. These laws are the consequence of the crustal composition and temperature distribution. (C) 2013 Elsevier B.V. All rights reserved.
WOS关键词CRUSTAL STRUCTURE BENEATH ; SULU OROGENIC BELT ; LITHOSPHERIC DENSITY ; CONTINENTAL-MARGIN ; SOUTHEASTERN CHINA ; CATHAYSIA BLOCKS ; MAGNETIC DATA ; SOUNDING DATA ; 3D INVERSION ; UPPER-MANTLE
WOS研究方向Geochemistry & Geophysics
语种英语
WOS记录号WOS:000339535000015
出版者ELSEVIER SCIENCE BV
资助机构Ministry of Science and Technology of China(Sinoprobe-03-02 ; Ministry of Science and Technology of China(Sinoprobe-03-02 ; Ministry of Science and Technology of China(Sinoprobe-03-02 ; Ministry of Science and Technology of China(Sinoprobe-03-02 ; National Nature Science Foundation of China(41021063 ; National Nature Science Foundation of China(41021063 ; National Nature Science Foundation of China(41021063 ; National Nature Science Foundation of China(41021063 ; Sinoprobe-02-02) ; Sinoprobe-02-02) ; Sinoprobe-02-02) ; Sinoprobe-02-02) ; 41274090 ; 41274090 ; 41274090 ; 41274090 ; 41004017) ; 41004017) ; 41004017) ; 41004017) ; Ministry of Science and Technology of China(Sinoprobe-03-02 ; Ministry of Science and Technology of China(Sinoprobe-03-02 ; Ministry of Science and Technology of China(Sinoprobe-03-02 ; Ministry of Science and Technology of China(Sinoprobe-03-02 ; National Nature Science Foundation of China(41021063 ; National Nature Science Foundation of China(41021063 ; National Nature Science Foundation of China(41021063 ; National Nature Science Foundation of China(41021063 ; Sinoprobe-02-02) ; Sinoprobe-02-02) ; Sinoprobe-02-02) ; Sinoprobe-02-02) ; 41274090 ; 41274090 ; 41274090 ; 41274090 ; 41004017) ; 41004017) ; 41004017) ; 41004017) ; Ministry of Science and Technology of China(Sinoprobe-03-02 ; Ministry of Science and Technology of China(Sinoprobe-03-02 ; Ministry of Science and Technology of China(Sinoprobe-03-02 ; Ministry of Science and Technology of China(Sinoprobe-03-02 ; National Nature Science Foundation of China(41021063 ; National Nature Science Foundation of China(41021063 ; National Nature Science Foundation of China(41021063 ; National Nature Science Foundation of China(41021063 ; Sinoprobe-02-02) ; Sinoprobe-02-02) ; Sinoprobe-02-02) ; Sinoprobe-02-02) ; 41274090 ; 41274090 ; 41274090 ; 41274090 ; 41004017) ; 41004017) ; 41004017) ; 41004017) ; Ministry of Science and Technology of China(Sinoprobe-03-02 ; Ministry of Science and Technology of China(Sinoprobe-03-02 ; Ministry of Science and Technology of China(Sinoprobe-03-02 ; Ministry of Science and Technology of China(Sinoprobe-03-02 ; National Nature Science Foundation of China(41021063 ; National Nature Science Foundation of China(41021063 ; National Nature Science Foundation of China(41021063 ; National Nature Science Foundation of China(41021063 ; Sinoprobe-02-02) ; Sinoprobe-02-02) ; Sinoprobe-02-02) ; Sinoprobe-02-02) ; 41274090 ; 41274090 ; 41274090 ; 41274090 ; 41004017) ; 41004017) ; 41004017) ; 41004017)
源URL[http://ir.iggcas.ac.cn/handle/132A11/85888]  
专题中国科学院地质与地球物理研究所
通讯作者Deng, Yangfan
作者单位1.Acad Sinica, Guangzhou Inst Geochemistry, Guangzhou 510640, Peoples R China
2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China
3.Univ Zaragoza, Phys Earth, Zaragoza 50009, Spain
推荐引用方式
GB/T 7714		 Deng, Yangfan,Zhang, Zhongjie,Badal, Jose,et al. 3-D density structure under South China constrained by seismic velocity and gravity data[J]. TECTONOPHYSICS,2014,627:159-170.
APA Deng, Yangfan,Zhang, Zhongjie,Badal, Jose,&Fan, Weiming.(2014).3-D density structure under South China constrained by seismic velocity and gravity data.TECTONOPHYSICS,627,159-170.
MLA Deng, Yangfan,et al."3-D density structure under South China constrained by seismic velocity and gravity data".TECTONOPHYSICS 627(2014):159-170.

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来源：地质与地球物理研究所

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