构造地层学的研究与应用

构造地层学是地层学中一个新的分支学科，它以现代地层学、构造地质学、变质地质学为主要理论基础。多年来变质岩区地质填图的实践证明，要解决经复杂变形和变质作用改造的变质岩系的地质问题，必须采用构造变形与地层学研究相结合的工作方法。按变质岩系的特点分为：成层有序岩区、总体有序局部无序岩区、片状无序岩区三个类型。在上述不同变质岩区建立各自地（岩）层单位序列：依次为岩石地层单位（群、组、段）、构造地层单位（岩群、岩组、岩段）、构造岩层单位（岩带、岩片、混杂岩等）。通过对构造变形与变质特征、形成序次、深成岩侵位及同位素年龄资料的综合分析，阐明变质岩的区域分布和形成时代，及其在地壳演化中的作用和意义。

STUDY AND APPLICATION OF TECTONOSTRATIGRAPHY

Tectonostratigraphy is a new branch of stratigraphy. Its theoretical basis is modern stratigraphy,structural geology,tectonics and metamorphic geology.Through many years of geological mapping in metamorphic terrains,it has been demonstrated that it is necessary to apply the work method of integrating the study of tectonic deformation with stratigraphic study in solving the geological problem about metamorphic series that have undergone complex deformation and metamorphism. According to different metarnorphic terrains,different lithodemic units have been established,i. e.: lithostratigraphic units（group,formation and member）,tectostratigraphic units（group complex,rock formation and rock member）and tectolithostratigraphic units（rock zone,rock sheets and melange）.Through an integrated analysis of the types of tectonic deformation and metamorphism,order of their formation,emplacement of plutons and isotopic age data,this paper discusses the regional distribution and formation ages of metamorphic rocks and their role and significance in the process of crustal evolution.