| 横向黏度变化的全地幔对流应力场初步研究 |
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| 引用本文： | 朱涛.横向黏度变化的全地幔对流应力场初步研究[J].地震学报,2011,33(5):582-594. |
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| 作者姓名： | 朱涛 |
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| 作者单位： | （中国北京100081中国地震局地球物理研究所） |
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| 基金项目： | 国家自然基金(40704017); 国家重点基础研究发展计划(973计划)(2008CB42570401); 国家地壳探测工程(SinoProbe-02)共同资助; 中国地震局地球物理研究所论著11AC1015 |
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| 摘 要： | 将地幔地震波速度异常转换为地幔横向黏度变化(达到3个数量级),在球坐标系下计算了瑞雷数为106、上边界为刚性、下边界为应力自由等温边界条件下的岩石层底部的地幔对流极型和环型应力场.结果表明,地幔对流极型应力场与地表大尺度构造具有良好的对应关系:俯冲带和碰撞带的应力呈现挤压状态,而洋中脊处的应力则呈现拉张状态.地幔对流环...
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| 关 键 词： | 地幔对流 应力场 横向黏度变化 地震波速度 |
A preliminary study on whole mantle convection stress in consideration of lateral viscosity variation |
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| Zhu Tao.A preliminary study on whole mantle convection stress in consideration of lateral viscosity variation[J].Acta Seismologica Sinica,2011,33(5):582-594. |
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| Authors: | Zhu Tao |
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| Institution: | Zhu Tao (Institute of Geophysics,China Earthquake Administration,Beijing 100081,China) |
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| Abstract: | Converting the seismic wave velocity anomalies into lateral viscosity variation (up to 3 orders) in the mantle, we obtained the poloidal and toroidal convection stress field at the bottom of lithosphere in spherical coordinates. In the computation, Rayleigh number is taken to be 106, and the top and bottom boundary are set to be rigid and free-slip isothermal, respectively. The result suggests that the poloidal convection stress field has a good correspondence with surface large-scale tectonics:The stress a... |
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| Keywords: | mantle convection stress field lateral viscosity variation seismic wave velocity |
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