S-wave velocity of the crust around Tianshan Mountains inverted from seismic ambient noise tomography
文献类型：SCI/SSCI论文
| 作者 | Guo Z. ; Gao X. ; Wang W. M. ; Li G. L. ; Duan Z. Q. ; Shi H. |
| 发表日期 | 2010 |
| 关键词 | ambient noise tomography Tianshan Mountains crustal structure upper mantle upwelling central tien-shan neighboring regions cenozoic tectonics mantle structure central-asia tarim basin beneath western kyrgyzstan china |
| 英文摘要 | We process ambient noise data from seismic stations deployed in central Asia to determine the crustal shear wave velocity structure beneath the Tianshan Mountians and surrounding area. About 748 inter-station Rayleigh wave empirical Green's functions have been recovered to estimate the phase velocity dispersions over periods from 6 to 50 s using the image transformation technique. Results show that for short periods (6-20 s), the distribution of Rayleigh wave phase velocities is generally consistent with surface geology, with high velocities corresponding to mountain ranges and low velocities to sedimentary basins. Along two profiles, which trend from NE-SW and NW-SE, the shear wave velocity shows a pair of high velocity anomalies dipping in opposite directions beneath the Tianshan Mountains. At shallow depths, those high velocity anomalies roughly correlate with areas where the mountain front and the surrounding basin are connected. The profiles also show a narrow zone beneath the Tianshan Mountains, which may represent a route for the upwelling from upper mantle. Those observations suggest that the underthrusting of the Tarim Basin and Kazakh Shield combine with the weakness of the crust, which is heated by the upwelling from upper mantle, may play an important role on the reactivation of the Tianshan Mountains associated with the India-Eurasia collision. |
| 出处 | Chinese Science Bulletin |
| 卷 | 55 |
| 期 | 31 |
| 页 | 3590-3598 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1001-6538 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/23906]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Guo Z.,Gao X.,Wang W. M.,et al. S-wave velocity of the crust around Tianshan Mountains inverted from seismic ambient noise tomography. 2010. |
入库方式： OAI收割
来源：地理科学与资源研究所
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