论文部分内容阅读
溆浦-三江断裂带是位于华南湘黔桂边境的平移断裂带。本文通过对断裂带基本平移构造的研究以及断裂带两侧地层岩相带的对比,认为该断裂带形成于中生代并以大规模左行平移为特征,最大平移量为300km。它强烈地改造了本区原来的构造面貌。在断裂带平移改造过程中,不同深度层次的地层岩相带的变形与变位方式有显著差别,地壳较深处以韧性变形为主,较浅部层次则主要为脆性-韧性过渡变形以至脆性变形。从地壳深部到浅处,断裂平移量是递增的。
Xupu - Sanjiang fault zone is located in southern China Hunan-Guizhou-Guizhou border translocation fault zone. Based on the study of the basic translational structure of the fault zone and the comparison of lithofacies belt on both sides of the fault zone, this paper considers that the fault zone formed in the Mesozoic and characterized by large-scale left-lateral translation with a maximum translation of 300 km. It has strongly transformed the original structure of the area. In the process of translational transformation of the fault zone, the deformation and displacement pattern of the lithofacies belonged to different depths. There was a significant difference between the deformation and the displacement pattern of the lithofacies zone. The deeper the crust was the ductile deformation, while the more shallow ones were mainly brittle-ductile transitional deformation and brittle deformation . From deep to shallow crust, translational displacement is increasing.