Investigation of the Kinematics of Block Rotations Through Patterns of Seismic P and T Axes and Fault Slickenline Using Micropolar Theory

脆性变形材料通常被建模为均匀连续体。然而，事实上，材料有一个以剪切面为界的刚性块为特征的子结构，而这种子结构的影响并没有被经典的连续介质理论所解释。该项目将测试并应用一个新的假设，该假设考虑了滑线方向上的刚性块体旋转和地震震源机制解决方案。这项工作将把加利福尼亚地震震源机制数据的微极解释与现有的古地磁和大地测量数据进行比较，还将研究其他地区的滑线模式，例如加利福尼亚北部海岸断层系统上的剪切蛇形岩。结果应该允许对理论进行重大测试，这有可能提高当前对脆性变形的理解。

Brittlely deforming material is commonly modeled as a homogeneous continuum. In fact, however, the material has a substructure, characterized by rigid blocks bounded by shear planes, and the effect of this substructure are not accounted for by classical continuum theory. This project will test and apply a new hypothesis that takes into account rigid block rotations on slickenline orientations and on seismic focal mechanism solutions. The work will compare the micropolar interpretation of seismic focal mechanism data from California against existing paleomagnetic and geodetic data and will also study slickenline patterns in other areas such as in sheared serpentines on the fault system in the northern California coast ranges. Results should permit a significant test of the theory, which has the potential of improving current understanding of brittle deformation.