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| Titel |
Multi-scale, Finite-frequency Travel-Time Tomography Illuminates 3-D Seismic Velocity Structure beneath Western Tibet |
| VerfasserIn |
S.-H. Hung, W.-P. Chen, L.-Y. Chiao, T.-L. Tseng |
| Konferenz |
EGU General Assembly 2009
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 11 (2009) |
| Datensatznummer |
250024836
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| Zusammenfassung |
| With a new multi-scale parameterization and advanced finite-frequency theory, we resolve
3-D variations in P - and S-wave speeds (V P and V S) in both the crust and the upper
mantle beneath Tibet. The resulting V P and V S models reveal that regions of low
electric resistivity, previously observed along active rifts in southern Tibet, correlate
well with regions of both low V P and V S wave speeds but such regions are not
interconnected, indicating that channel-like crustal flow is inactive. In the upper mantle,
there is no indication of down-welling between depths of 100 to 400 km. Instead, a
strong, lateral boundary between fast and slow seismic velocities occurs north of
33-N, marking the northern limit of underthrusting Indian lithospheric mantle. |
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