断层岩与断层模式

本文通过对断层岩的结构、构造特征及其力学成因研究现状的综述，提出以下几点看法：（１）断层岩是在特定的地质环境下形成的，其结构特征直接反映所处境的地质构造运动特性所以通过研究断层岩的内部组构可以直接了解形变环境及其区域地质构造发展史；（２）断层财的线理和面理结构既可以在韧塑性条件下形成，也可以在脆性条件下形成，因此是否具有线理与面理结构不能作支岩分类的决定性基准；（３）断层岩母岩结晶的大小直接影响断

FAULT ROCKS AND FAULTING MODEL

Based on a review of previous work on the textures, microstructures, and origin of fault rocks, this paper gives some new interpretations and suggestions on the classifications of fault rocks and faulting model as following. (1) Fault rocks formed at some specific tectonic regions and provided a record of the nature of deformation. So, it is generally believed that the regional tectonic history can be understood by studing the textures of fault rocks. (2) The textures such as lineations and foliations found in fault rocks not only formed in ductile shear zone, but also formed in brittle shear zone. Therefore, the lineations and foliations can not be used as an only criterion in the clssification of fault rocks. (3) The original grain size of crystals included in host rocks must be considered in the classification of fault rocks and the deduction of deformational degree of fault rocks from the grain size, because the original grain size of crystals included in host rocks affects the changes of grain size in fault rocks. (4) It is possible to understand the formation mechanism of fault rocks and related seismic faulting, and to build a relative realistic fault model by studying the mechanical mechanism of fault rocks and related subjects such as seismology, tectonics, rheology and mechanics of materials.