Seismic P-wave tomography in eastern Tibet: Formation of the rifts |
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Authors: | Heng Zhang JunMeng Zhao Qiang Xu |
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Institution: | ZHANG Heng *,ZHAO JunMeng & XU Qiang Key Laboratory of Continental Collision and Plateau Uplift,Institute of Tibetan Plateau Research,Chinese Academy of Sciences,Beijing 100085,China |
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Abstract: | For better studying the relationship between the rifts and deep structure, a detailed P-wave velocity structure under eastern Tibet has been modeled using 4767 arrival times from 169 teleseismic events recorded by 51 portable stations. In horizontal slices through the model, a prominent low-velocity anomaly was detected under the rifts from the surface to a depth of ~250 km; this extends to a depth of ~400 km in the vertical slice. This low-velocity anomaly is interpreted as an upper mantle upwelling. The o... |
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Keywords: | tomography upper mantle upwelling Indian plate subduction north-south trending rifts Tibetan Plateau |
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