板块内部层状负位错模型及其反演

Abstract

提出了一种层状负位错模型 ,用于描述下层地壳拖带上层地壳的耦合作用所造成的上伏地壳变形 ,并通过模拟计算 ,给出了这种层状耦合模型的形变场特征 ,以及利用模拟形变数据反演层状负位错模型参数的结果 A horizontal negative dislocation layer is proposed to represent the mechanism of the intraplate crustal deformation. A simulated example is designed to show the crustal deformation pattern of a horizontal negative dislocation layer model and inverse the simulated displacements to determine the model parameters. Because of the heterogeneous geological structures and rock properties of the overlying crust, the coupling between the lower crustal movements and the overlying upper crust is not homogeneous, and the shear deformation zone will occurr along the boundary of the different negative dislocation areas. On the other hand, the observed deformation data such as displacements can be used to determine the layer negative dislocation distributions inversely, so as to divide the monitoring area into different tectonic blocks and to analyze the earthquake risks.