一种岩体断裂泥化带的形成机理和矿物演化探讨

通过对某工区花岗岩体断裂泥化带的地质条件、矿物成分和微结构特征的研究.表明泥化带的形成是在湿热气候条件下,岩石经过长时间的风化淋滤作用的结果,属风化残积型泥化带.原岩矿物在水的作用下,发生晶体结构上的变化、溶蚀分解和在水溶液中重新沉淀结晶等方式演变为粘土矿物.

Discussion on Formation Mechanism of Argillitization Zone and Mineral Evolutionary Process in A Granite Body

In this paper the geological background, mineral constitution and micro-texture characteristics of the argillitization zone in a granite body are studied, and the results show that the formation of the argillitization zone was developed by the weathering eluviation of the rock under condition of humid-hot climate. It belongs to the argillitization of the weathering eluvium. As a result, three types of processes of the mineral evolution can be recognized: 1. some mineral crystal structures changed from one type to another; 2. some minerals dissolved in the groundwater; 3. some minerals precipitated in the solution.