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首页> 外文期刊>Pure and Applied Geophysics >3-D Modelling of Plate Interfaces and Numerical Simulation of Long-term Crustal Deformation in and around Japan
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3-D Modelling of Plate Interfaces and Numerical Simulation of Long-term Crustal Deformation in and around Japan

机译：日本及其周边地区板块界面的3-D建模和长期地壳形变的数值模拟

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— We developed a 3-D simulation model for long-term crustal deformation due to steady plate subduction in and around Japan by incorporating viscoelastic slip-response functions into a realistic 3-D plate interface model, constructed on the basis of the topography of ocean floors and hypocenter distributions of earthquakes. The lithosphere-asthenosphere system is modelled by an elastic surface layer overlying a Maxwellian viscoelastic half-space. Kinematic interaction at plate interfaces is rationally represented by the increase of tangential displacement discontinuity (fault slip) across the interfaces. With this model, giving the steady slip rates at plate interfaces calculated from NUVEL-1A, we simulated long-term crustal deformation due to steady plate subduction in and around Japan. The simulated crustal deformation pattern is characterized by steep uplift at island arcs, sharp subsidence at ocean trenches and gentle uplift at outer rises. The numerical results show the strong dependence of the deformation pattern on the 3-D geometry of plate interfaces.
机译：—通过将粘弹性滑移响应函数纳入基于海洋地形的逼真的3-D板界面模型中，我们开发了3D模拟模型，用于日本及其周边地区因板块俯冲而导致的长期地壳变形。地震的底面和震源分布。岩石圈-软流圈系统通过覆盖Maxwellian粘弹性半空间的弹性表层建模。板界面的运动学相互作用可以合理地表示为跨界面的切向位移不连续性（断层滑动）的增加。利用该模型，给出了根据NUVEL-1A计算得出的板界面稳定滑移率，我们模拟了日本及其周边地区由于板稳定俯冲而引起的长期地壳变形。模拟的地壳变形模式的特征是在岛弧处陡峭的隆起，在海沟处的急剧沉降和在外部隆起处的缓和隆起。数值结果表明，变形模式对板界面的3-D几何形状具有很强的依赖性。

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