S-wave velocity and Poisson's ratio structure of crust in Yunnan and its implication
文献类型：期刊论文
| 作者 | Hu, JF; Su, YJ; Zhu, XG; Chen, Y |
| 刊名 | SCIENCE IN CHINA SERIES D-EARTH SCIENCES
 |
| 出版日期 | 2005-02-01 |
| 卷号 | 48期号:2页码:210-218 |
| 关键词 | Yunnan S-wave Velocity Poisson's Ratio Sichuan-yunnan Diamond Block |
| ISSN号 | 1006-9313 |
| DOI | 10.1360/03yd0062 |
| 文献子类 | Article |
| 英文摘要 | Receiver function of body wave under the 23 stations in Yunnan was extracted from 3-component broadband digital recording of teleseismic event. Thus, the S-wave velocity structure and distribution characteristics of Poisson's ratio in crust of Yunnan are obtained by inversion. The results show that the crustal thickness is gradually thinned from north to south. The crustal thickness in Zhongdian of northwest reaches as many as 62.0 km and the one in Jinghong of further south end is only 30.2 km. What should be especially noted is that there exists a Moho upheaval running in NS in the Chuxiong region and a Moho concave is generally parallel to it in Dongchuan. In addition, there exists an obvious transversal inhomogeneity for the S-wave velocity structure in upper mantle and crust in the Yunnan region. The low velocity layer exists not only in 10.0-15.0 km in upper crust in some regions, but also in 30.0-40.0 km in lower crust. Generally, the Poisson's ratio is on the high side, however it has a better corresponding relation to the crustal velocity structure. An obvious block distribution feature is still shown on such a high background of Poisson's ratio. It is discovered by synthetically analyzing the velocity structure and Poisson's ratio distribution that there are high Poisson's ratio and complicated crust-mantle velocity structure feature in the Sichuan-Yunnan Diamond Block with Xiaojiang fault to be the east boundary and Yulong Snow Mountain fault to be the west boundary besides the frequent seismicity. This feature differs obviously from that of surrounding areas, which would provide geophysical evidence to deeply study the eastwardly flowage of lithospheric substances in the Qinghai-Tibet Plateau. |
| WOS关键词 | WESTERN YUNNAN ; PROVINCE ; TIBET ; CHINA |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000228190600008 |
| 出版者 | SCIENCE CHINA PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/65592]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Hu, JF |
| 作者单位 | 1.Yunnan Univ, Dept Geophys, Kunming 650091, Peoples R China 2.Seismol Bur Yunnan Province, Kunming 650041, Peoples R China 3.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Hu, JF,Su, YJ,Zhu, XG,et al. S-wave velocity and Poisson's ratio structure of crust in Yunnan and its implication[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2005,48(2):210-218. |
| APA | Hu, JF,Su, YJ,Zhu, XG,&Chen, Y.(2005).S-wave velocity and Poisson's ratio structure of crust in Yunnan and its implication.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,48(2),210-218. |
| MLA | Hu, JF,et al."S-wave velocity and Poisson's ratio structure of crust in Yunnan and its implication".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 48.2(2005):210-218. |
入库方式： OAI收割
来源：地质与地球物理研究所
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