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详细评述了剪切带运动学和内部几何学研究的新进展。剪切带内的递进变形一般为三斜对称,单斜剪切带(包括简单剪切带)是特例情形。理论模拟表明,如同许多天然剪切带中所见到的,在三斜剪切带中,拉伸线理的方位可从近水平到平行于倾向连续变化。过去一般将拉伸线理的方向当作剪切运动方向的做法是以简单剪切模式为基础的,不适合于一般剪切带。在三斜剪切带中,拉伸线理和剪切方向之间不存在简单关系。然而,C面上的韧性滑动擦痕平行于剪切方向发育,是剪切方向的可靠标志。因此,在剪切带运动学解释中区分韧性滑动擦痕与拉伸线理非常重要。
The progress of shear band kinematics and internal geometry research is reviewed in detail. Progressive deformation in the shear zone is generally triclinic and monoclinic shear zones (including simple shear zones) are a special case. Theoretical simulations show that, as seen in many natural shear bands, the orientation of the stretching line can vary continuously from near horizontal to parallel to the dip in tri-oblique shear bands. In the past, it was generally based on the simple shear mode that the direction of the stretching line was taken as the direction of shear movement, which was not suitable for the general shear zone. In the triclinic shear zone, there is no simple relationship between the stretching line and the shear direction. However, the ductile sliding scratches on the C-plane develop parallel to the shear direction and are reliable indicators of shear direction. Therefore, it is very important to distinguish between ductile sliding scratches and stretching lines in the kinematic interpretation of shear zones.