Reconstruction of the S-wave velocity structure of crust and mantle from seismic surface wave dispersion in Sichuan-Yunnan Region
文献类型：期刊论文
| 作者 | Zhang Zhi1; Chen Yun2; Li Fei2 |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2008-07-01 |
| 卷号 | 51期号:4页码:1114-1122 |
| 关键词 | frequency-time analysis surface wave dispersion crustal and upper mantle structure thickness of the crust S wave velocity |
| ISSN号 | 0001-5733 |
| 文献子类 | Article |
| 英文摘要 | We apply the technique of matched filter frequency time analysis to process long period surface wave data covering Sichuan and Yunnan regions, and then obtain the surface wave group velocity dispersion in the period range 10 similar to 100 s. Then we use the grid inversion method to extract pure path dispersion in the grid of 1.5 degrees x 1.5 degrees after getting the distance and time in the grid of the study area by ray tracing, at the same time, we employ the damped least-square method to determine the crust-mantle S wave velocity structure in the Sichuan and Yunnan region. The result shows that the crust of the region is thickened and shortened. In spite of some local low velocity anomalies, the crust and uppermost mantle of the rhombic Chuan-Dian block as a whole have relatively high velocity as compared with the surrounding areas. The peripheral strike-slipping faults display negative velocity anomalies down to the top of upper mantle, which facilitates the lateral extrusion of crustal blocks along the faults. The high conductivity layer in the crust and upper mantle in western Yunnan and Sichuan is connected with partial melting or detachment structure. The average depth of Moho of Sichuan basin is about 48 kin. The Moho in Yunnan reaches 58 km in the north end and is about 51 km in the south end, which proves that different blocks are affected differently by tectonic movement. |
| WOS关键词 | SOUTHWESTERN CHINA ; RECEIVER FUNCTION ; BINCHUAN ; PROVINCE ; ZHEFANG ; PROFILE ; MALONG ; ZONE ; ASIA |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000258061300020 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/69856]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Zhang Zhi |
| 作者单位 | 1.Guilin Inst Technol, Dept Resource & Environm Engn, Key Lab Geol Engn Ctr Guangxi Prov, Guilin 541004, Peoples R China 2.Chinese Acad Sci, Inst Geol & Geophys, State Key Lab Lithospher Evolut, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Zhang Zhi,Chen Yun,Li Fei. Reconstruction of the S-wave velocity structure of crust and mantle from seismic surface wave dispersion in Sichuan-Yunnan Region[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2008,51(4):1114-1122. |
| APA | Zhang Zhi,Chen Yun,&Li Fei.(2008).Reconstruction of the S-wave velocity structure of crust and mantle from seismic surface wave dispersion in Sichuan-Yunnan Region.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,51(4),1114-1122. |
| MLA | Zhang Zhi,et al."Reconstruction of the S-wave velocity structure of crust and mantle from seismic surface wave dispersion in Sichuan-Yunnan Region".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 51.4(2008):1114-1122. |
入库方式： OAI收割
来源：地质与地球物理研究所
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