徐宿弧形构造在构造演化和成因机制上均具有特殊意义。在综合分析区域构造背景和构造演化的基础上,结合野外构造观测进行定向岩样薄片观察,鉴定不同构造部位的显微构造特征。研究表明,该区脆性及塑形显微构造均有不同程度的发育,中浅层以低温脆性流变特征为主,且受多期次构造运动相互干扰和叠加,呈现出复杂多变的构造演化过程。 The Xucun arc structure has special significance in the tectonic evolution and genetic mechanism. Based on the comprehensive analysis of the tectonic setting and tectonic evolution of the area, combined with the observation of the field structure observation, the directional rock specimen is observed and the microstructural features of different tectonic parts are identified. The results show that the brittle and shape microstructures in this area all have different degrees of development. The middle and shallow layers are mainly characterized by low temperature and brittle rheological characteristics. They are interfered with and superimposed by multi-stage tectonic movements, showing complex and changeable structures Evolutionary process.