Uppermost mantle structure and its relation with seismic activity in the central Tien Shan
文献类型：期刊论文
| 作者 | Xu, Yi; Li, Zhiwei; Roecker, Steven W. |
| 刊名 | GEOPHYSICAL RESEARCH LETTERS
 |
| 出版日期 | 2007-05-22 |
| 卷号 | 34期号:10 |
| ISSN号 | 0094-8276 |
| DOI | 10.1029/2007GL029708 |
| 文献子类 | Article |
| 英文摘要 | Using arrival data from GHENGIS and Kyrgyz Network (KNET) stations, we determined the uppermost mantle structure of the central Tien Shan from Pn tomography. Pn velocities in the north-central Tien Shan are slower than normal for stable lithosphere. They are very slow in the south-central Tien Shan, where a hot mantle previously has been postulated. The Pn velocity variation correlates well with seismicity. Most earthquakes are concentrated in the north-central Tien Shan, but almost no earthquakes in the south-central Tien Shan, even though both geologic and GPS observations show active convergence there. This correlation suggests a genetic relationship between seismicity and the state of lithospheric mantle. Specifically, we propose that the very slow Pn velocity beneath the south-central Tien Shan is caused by high temperatures produced by heating from mantle upwelling, and that this heat has conducted well up into the crust, inducing a ductile rheology that prevents significant seismicity. |
| WOS关键词 | 3-DIMENSIONAL VELOCITY STRUCTURE ; CENTRAL-ASIA ; TOMOGRAPHIC INVERSION ; RECEIVER FUNCTIONS ; SOURCE PARAMETERS ; BENEATH CHINA ; PN TOMOGRAPHY ; EARTHQUAKE ; KYRGYZSTAN ; WESTERN |
| WOS研究方向 | Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000246845600004 |
| 出版者 | AMER GEOPHYSICAL UNION |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/67715]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Xu, Yi |
| 作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Beijing 100029, Peoples R China 2.Rensselaer Polytech Inst, Dept Earth & Environm Sci, Troy, NY 12180 USA |
| 推荐引用方式 GB/T 7714 | Xu, Yi,Li, Zhiwei,Roecker, Steven W.. Uppermost mantle structure and its relation with seismic activity in the central Tien Shan[J]. GEOPHYSICAL RESEARCH LETTERS,2007,34(10). |
| APA | Xu, Yi,Li, Zhiwei,&Roecker, Steven W..(2007).Uppermost mantle structure and its relation with seismic activity in the central Tien Shan.GEOPHYSICAL RESEARCH LETTERS,34(10). |
| MLA | Xu, Yi,et al."Uppermost mantle structure and its relation with seismic activity in the central Tien Shan".GEOPHYSICAL RESEARCH LETTERS 34.10(2007). |
入库方式： OAI收割
来源：地质与地球物理研究所
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