3D density structure of lithosphere beneath northeastern margin of the Tibetan Plateau
文献类型：期刊论文
| 作者 | Wang Xin-Sheng1,2,3; Fang Jian2; Hsu Hou-Tse2 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2013-11-01 |
| 卷号 | 56期号:11页码:3770-3778 |
| 关键词 | Northeastern margin of the Tibetan Plateau Density structure Gravity inversion Crustal-mantle decoupling |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg20131118 |
| 文献子类 | Article |
| 英文摘要 | We obtained the three dimensional velocity and density structures of lithosphere beneath northeastern margin of the Tibetan Plateau (TP) using gravity and seismic data, and discussed its geodynamic implication. Firstly, P wave velocity structures are determined by seismic tomography using P wave travel time data, and then converted to initial density model for the following gravity inversion. Subsequently, the density structures in lithosphere are inverted by Bouguer gravity anomaly. Our density model shows that the crustal density structures are critical for the occurrence of earthquakes as well as the lower crustal flow. The trend of density isopleths is coherent with that of surface fractures in the crust. However, it presents a clockwise rotation in the mantle. This phenomenon may indicate the decoupling between curst and mantle. In 80 similar to 100 km depth, P wave velocity anomalies are significantly lower than density anomalies. This may demonstrate the partial melting and increase of rock water content. The combined effects of the subduction of Indian plate and the obstruction force from Ordos and Alashan blocks made a strong tectonic squeezing, inducing the asthenosphere upwelling, and providing conditions for the crustal-mantle decoupling, partial melting, and reduction of the P velocity. |
| WOS关键词 | QINGHAI-XIZANG PLATEAU ; WAVE VELOCITY STRUCTURE ; UPPER-MANTLE BENEATH ; CRUSTAL STRUCTURE ; NORTH CHINA ; AREA ; CALIFORNIA ; ANISOTROPY ; INVERSION ; FLOW |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000327753000018 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/87568]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Wang Xin-Sheng |
| 作者单位 | 1.Natl Earthquake Infrastruct Serv, Beijing 100036, Peoples R China 2.Chinese Acad Sci, State Key Lab Geodesy & Earths Dynam, Inst Geodesy & Geophys, Wuhan 430077, Peoples R China 3.Chinese Acad Sci, Key Lab Earths Deep Interior, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wang Xin-Sheng,Fang Jian,Hsu Hou-Tse. 3D density structure of lithosphere beneath northeastern margin of the Tibetan Plateau[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2013,56(11):3770-3778. |
| APA | Wang Xin-Sheng,Fang Jian,&Hsu Hou-Tse.(2013).3D density structure of lithosphere beneath northeastern margin of the Tibetan Plateau.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,56(11),3770-3778. |
| MLA | Wang Xin-Sheng,et al."3D density structure of lithosphere beneath northeastern margin of the Tibetan Plateau".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 56.11(2013):3770-3778. |
入库方式： OAI收割
来源：地质与地球物理研究所
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