Modeling of deformation and tectonic loading processes in the island arc crust : toward understanding the mechanisms of large inland earthquakes

为了认识内陆大地震的发生过程，我们研究了岛弧地壳和上地幔内部非弹性变形和断裂作用引起的构造加载过程。岛弧地壳和上地幔的非均匀流变结构控制着岛弧内部的变形和断裂过程。考虑热构造引起的非均匀流变结构，采用有限元方法建立了日本东北缘欧主干带等地区地壳变形和断裂过程的三维数值模型。

For understanding generation processes of large inland earthquakes, we investigate the tectonic loading processes due to internal inelastic deformation and faulting processes in the island arc crust and uppermost mantle. The internal deformation and faulting processes are controlled by the non-uniform rheological structures in the island arc crust and uppermost mantle. The present study developed 3D numerical models by a finite element method for the deformation and faulting processes in the crust along the Ou Backbone range, NE Japan, and some other regions, by considering the non-uniform rheological structures due to thermal structure.