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在SEM下能够得到发育很好的显微地质构造,它们为宏观构造的发生、发展及成生联系提供了更细致的依据。在此,笔者将扼要地描述几种主要的显微地质构造的显微形貌特征。一·破裂性显微构造此构造常发育于硬性矿物及岩石之中,如细小的石英颗粒之上。其形貌为园形或半园形贝壳状断口(照1)、显微断层(照2)和“裂而不破”的张裂隙。二·塑性显微构造此构造主指劈理、线理和显微褶皱。劈理又称流劈理。在SEM下它由微劈石域和劈理域组成(照3)。微劈石域是石英富集部位,呈粒
Well-developed microstructures can be obtained under SEM, which provide more detailed evidences for the occurrence, development and connection of macro-structure. Here, I will briefly describe the microscopic topographic features of several major micro-geological formations. A rupture microstructure This structure often develops in hard minerals and rocks, such as fine quartz particles above. Its morphology is circular or semi-circular conchoidal fracture (photo 1), microscopic fault (according to 2) and “crack without breaking” Zhang cracks. Second, the plastic microstructure The structure of the main finger cleavage, lines and micro-folds. Cleavage, also known as flow cleavage. It consists of micro-spar and cleave domains under SEM (photo 3). Micro-splitting area is quartz enrichment site, was grain