DOI: 10.1002/2015GL063921
论文题名: Depth-variant azimuthal anisotropy in Tibet revealed by surface wave tomography
作者: Pandey S. ; Yuan X. ; Debayle E. ; Tilmann F. ; Priestley K. ; Li X.
刊名: Geophysical Research Letters
ISSN: 0094-9600
EISSN: 1944-9331
出版年: 2015
卷: 42, 期: 11 起始页码: 4326
结束页码: 4334
语种: 英语
英文关键词: azimuthal anisotropy
; Rayleigh wave
; shear wave splitting
; surface wave
; Tibet
Scopus关键词: Anisotropy
; Deformation
; Rayleigh waves
; Shear flow
; Shear strain
; Shear waves
; Tomography
; Accumulated shear strain
; Azimuthal anisotropy
; Polarization direction
; Rayleigh wave tomography
; Shear wave splitting
; Splitting measurements
; Surface-wave tomography
; Tibet
; Surface waves
英文摘要: Azimuthal anisotropy derived from multimode Rayleigh wave tomography in China exhibits depth-dependent variations in Tibet, which can be explained as induced by the Cenozoic India-Eurasian collision. In west Tibet, the E-W fast polarization direction at depths <100 km is consistent with the accumulated shear strain in the Tibetan lithosphere, whereas the N-S fast direction at greater depths is aligned with Indian Plate motion. In northeast Tibet, depth-consistent NW-SE directions imply coupled deformation throughout the whole lithosphere, possibly also involving the underlying asthenosphere. Significant anisotropy at depths of 225 km in southeast Tibet reflects sublithospheric deformation induced by northward and eastward lithospheric subduction beneath the Himalaya and Burma, respectively. The multilayer anisotropic surface wave model can explain some features of SKS splitting measurements in Tibet, with differences probably attributable to the limited back azimuthal coverage of most SKS studies in Tibet and the limited horizontal resolution of the surface wave results. ©2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84934441895&doi=10.1002%2f2015GL063921&partnerID=40&md5=de5e6f45f208220ab13e02d3d4c67424
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/9215
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Deutsches GeoForschungsZentrum GFZ, Telegrafenberg, Potsdam, Germany
Recommended Citation:
Pandey S.,Yuan X.,Debayle E.,et al. Depth-variant azimuthal anisotropy in Tibet revealed by surface wave tomography[J]. Geophysical Research Letters,2015-01-01,42(11).