English
 
Privacy Policy Disclaimer
  Advanced SearchBrowse

Item

ITEM ACTIONSEXPORT
Add to Basket
  Local TagsRelease HistoryDetailsSummary

Released
Journal Article

Depth-variant azimuthal anisotropy in Tibet revealed by surface wave tomography

Authors

Pandey,  Shantanu
External Organizations;
GEOFON, Deutsches GeoForschungsZentrum;

/persons/resource/yuan

Yuan,  Xiaohui
2.4 Seismology, 2.0 Physics of the Earth, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GEOFON, Deutsches GeoForschungsZentrum;

Debayle,  Eric
External Organizations;
GEOFON, Deutsches GeoForschungsZentrum;

/persons/resource/tilmann

Tilmann,  F.
2.4 Seismology, 2.0 Physics of the Earth, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GEOFON, Deutsches GeoForschungsZentrum;

Priestley,  Keith
External Organizations;
GEOFON, Deutsches GeoForschungsZentrum;

/persons/resource/li

Li,  X. Q.
2.1 Physics of Earthquakes and Volcanoes, 2.0 Physics of the Earth, Departments, GFZ Publication Database, Deutsches GeoForschungsZentrum;
GEOFON, Deutsches GeoForschungsZentrum;

External Ressource
No external resources are shared
Fulltext (public)

1274632.pdf
(Publisher version), 3MB

Supplementary Material (public)
There is no public supplementary material available
Citation

Pandey, S., Yuan, X., Debayle, E., Tilmann, F., Priestley, K., Li, X. Q. (2015): Depth-variant azimuthal anisotropy in Tibet revealed by surface wave tomography. - Geophysical Research Letters, 42, 11, 4326-4334.
https://doi.org/10.1002/2015GL063921


Cite as: https://gfzpublic.gfz-potsdam.de/pubman/item/item_1274632
Abstract
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.