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《CT Theory and Applications》 2011-03
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Teleseismic Tomography of Deep Velocity Structure in the Eastern Edge of Tibetan Plateau

ZHAO Qi-guang,LOU Hai,WANG Chun-yong(Institute of Geophysics,China Earthquake Administration,Beijing 100081,China)  
The P-wave velocity structure in the eastern edge of Tibetan plateau within the depth range of 300km was obtained by using the FMTOMO seismic tomography software and teleseismic teaveltimes data.Our results show that:(1)From 60 km to 140 km,102°E~104°E,29°N~31°N,there is a relative low velocity region in the southwest of Sichuan basin.(2)In the depth range from 60km to 140 km,the phenomenon of relative high velocity appears along the northwest side of Longmenshan fault.(3)In the depth range from 190 km to 290 km,there is a high velocity phenomenon in the southwest region of eastern edge of Tibetan plateau.The Longmenshan fault and Anninghe fault are not the boundary between high velocity region and low velocity region.
【Fund】: 国家重点基础研究发展计划(973计划)“汶川地震发生机理及其大区域动力环境研究”(2008CB425704);; 国家科技专项“深部探测技术试验与集成(Sinoprobe-2)”
【CateGory Index】: P315
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