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走滑断裂是大陆造山带中一种非常重要的构造类型,并常常成为各种流体异常活动的场所。湘东地区自晚三叠世以来的陆内造山作用形成了NNE 向走滑断裂系统。该走滑断裂系统经历了从会聚走滑(T3 - J) 向离散走滑(K- E1) 的重大构造性质转换,并明显控制了该地区中新生代的岩浆活动、断陷盆地和区域热液铀成矿作用。本文以湘东地区若干走滑断裂为例, 研究了其中各种构造岩的流体包裹体特征。结果表明,走滑变形过程中伴随着显著的流体活动, 而且在不同变形时期或同一变形期不同变形环境,其流体作用有显著不同。走滑断裂中的流体作用对区域热液铀矿床的形成具有重要意义。
Strike-slip faults are a very important tectonic type in the continental orogen and are often the site of unusual fluid activity. The intracontinental orogenic processes in the eastern Hunan since the Late Triassic formed the NNE strike-slip fault system. The strike-slip system underwent a major structural transformation from convergent strike slip (T3-J) to discrete strike slip (K-E1) and significantly controlled the Cenozoic magmatism, faulted basin and regional heat Liquid uranium mineralization. Taking some strike-slip faults in eastern Hunan as an example, the characteristics of fluid inclusions in various tectonic rocks are studied. The results show that there are significant fluid activities in the process of strike-slip deformation, and the fluid functions are significantly different in different deformation periods or deformation environments with the same deformation period. The fluid function in strike-slip faults is of great significance to the formation of hydrothermal uranium deposits in the region.