A Model of Mechanically Coupled Deformation in Lithosphere beneath the Eastern Tibetan Plateau and Its Vicinity
详细信息
- 责任者：Wang Chunyong (Institute of Geophysics ; China Earthquake Administration ; Beijing 100081 ; China) ; Chang Lijun
- 刊名：Earth Science Frontiers
- 出版年：2008
- 卷期：15(6)
- 关键词：岩石圈 ; lithosphere ; 青藏高原 ; Qinghai-Tibetan Plateau
- 页码：p.208-218
- 图表：7 illus., 67 refs.
- 分类号：0400
- issnNo：ISSN1005-2321
- isbnNo：CN11-3370/P
摘要
Based on the SKS-wave splitting analysis on the seismic records at 143 broadband permanent and temporary stations deployed in the eastern Tibetan Plateau and its vicinity, the authors determined the fast polarization direction and delay time between fast and slow waves at individual stations; the pattern of SKS-splitting fast polarization direction exhibits the flow direction of upper mantle’s material in the eastern Tibetan Plateau, i.e., the clockwise rotation around the Eastern Himalayan Syntaxis. The style of orogenic deformation can be quantitatively evaluated by the joint analysis of the surface deformation field, as inferred from GPS and Quaternary fault slip, and the mantle deformation field from seismic anisotropy. The greatly expanded data set of surface deformation (GPS) and seismic anisotropy (SKS splitting) from eastern Tibet , Yunnan and Sichuan