摘要
在1∶5万区域地质填图及专题研究的基础上探讨了变质岩石中的岩浆侵位变形构造、褶皱构造及变形与变质作用的关系等三个方面的问题。研究表明冀东太古宙高级区变质岩石中不同程度地发育岩浆岩构造,包括在不同类型片麻岩之间所表现的穿切构造、基性岩墙中的矿物定向构造以及基性岩体边缘及其围岩的变形构造等,褶皱构造可分为表壳岩褶皱及片麻岩褶皱,高级区可能不存在大型的片麻岩褶皱,通过镜下特征矿物相的研究并结合野外变质基性岩墙的产状及特征,建立区域变质与变形作用的关系,从而为区域地质事件表的建立提供依据。
This paper deals with intrusion-related structures occurred in metamorphic rocks, fold structures and the correlation between regional metamorphism and deformation through regional mapping and other means of research work. Many types of intrusion-related structures have been recognized in high-grade terrane, including intrusive contact, mineral orientation and deformational structures. Fold strcutures can be divided into two groups, the supercrustal fold and gneiss fold. In the light of electron-microscope study of minerals as well as the deservation to the field occurrence of basic dykes, the evolutional history of regional metamorphism and deformation has been set up.
关键词
侵位变形构造
褶皱构造
变质岩
intrusion-related deformation, fold structure, correlation between deformation and metamorphism, high-grade terrane, Eastern Hebei
