Lithospheric velocity structure of eastern Tibet Plateau from triplication

Sui Yi; Wu Qingju; Zhang Ruiqing

doi:10.11939/jass.20180030

Acta Seismologica Sinica > 2018 > 40(5): 537-546. > DOI: 10.11939/jass.20180030

Sui Yi, Wu Qingju, Zhang Ruiqing. 2018: Lithospheric velocity structure of eastern Tibet Plateau from triplication. Acta Seismologica Sinica, 40(5): 537-546. DOI: 10.11939/jass.20180030

Citation:

Sui Yi, Wu Qingju, Zhang Ruiqing. 2018: Lithospheric velocity structure of eastern Tibet Plateau from triplication. Acta Seismologica Sinica, 40(5): 537-546. DOI: 10.11939/jass.20180030

Citation:

Sui Yi, Wu Qingju, Zhang Ruiqing. 2018: Lithospheric velocity structure of eastern Tibet Plateau from triplication. Acta Seismologica Sinica, 40(5): 537-546. DOI: 10.11939/jass.20180030

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Lithospheric velocity structure of eastern Tibet Plateau from triplication

1.
Institute of Geophysics，China Earthquake Administration，Beijing 100081，China
2.
Key Laboratory of Seismic Observation and Geophysical Imaging，Beijing 100081，China

More Information

Received Date: March 04, 2018
Revised Date: May 14, 2018
Available Online: July 01, 2018
Published Date: August 31, 2018

Graphical Abstract

Abstract

Abstract

By comparing the synthetic and observed seismic triplications for two events from Qinghai and Myanmar Arc with the trial-and-error method, the velocity structures of P-wave and S-wave from Moho to the depth of 180 km are obtained. The P-wave velocity models for the profiles A and B beneath Songpan-Garze block are 5% higher than that in the model C2AK, which is based on the model AK135 with crust structure of Crust2.0. The P-wave velocity model for the profile C beneath Sichuan-Yunnan block, however, is 5% lower than that in the model C2AK at Moho depth, and then increases slowly down to the depth of 120 km. The S-wave velocity model beneath Songpan-Garze block is 3% higher than the model C2AK from Moho to 180 km. Such regional difference in velocity structure may indicate that the lithospheric mantle beneath Sichuan-Yunnan block has been extruded more obviously than that beneath Songpan-Garze block in the uplift of the Tibetan Plateau.
- eastern Tibetan Plateau,
- lithosphere,
- seismic triplication,
- velocity structure

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References (38)

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