| 青藏高原及其邻区地壳上地幔S波速度结构 |
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| 关键词:shear wave velocity crust and upper mantle Tibetan plateau |
| 基金项目:国家自然科学基金(49834020)(40034010) |
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| 摘要: |
| Crust and Upper Mantle Shear Velocity Structure beneath the Tibetan Plateau and Adjacent Areas |
| The long period surface data recorded by 33 digital seismic stations of CDSN, IRIS, GEOSCOPE and other temporary seismic stations were used to study the crust and upper mantle shear velocity structure beneath the Tibetan plateau and adjacent areas (20°～40°N,75°～105°E). In China and adjacent areas(5°～55°N,68°～150°E), Rayleigh group velocity dispersions between 7s and 184 s period of 1°×1° grid were calculated by means of occam's inversion. From these dispersion curves, the three dimensional shear velocity structures in 0～420 km depths were inverted at each node in the study area (20°～40°N, 75°～105°E). The results indicate that the Tibetan plateau not only has a thick crust (60～70 km) and very thick lithosphere (exceeding 200 km), but also shows ob vious lat eral variation of crust and upper mantle velocity structure in different terranes. |
| SU Wei,PENG Yan-ju,ZHENG Yue-jun,HUANG Zhong-xian.2002.Crust and Upper Mantle Shear Velocity Structure beneath the Tibetan Plateau and Adjacent Areas[J].Acta Geoscientica Sinica,23(3):193-200. |
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