摘要
华南前震旦纪浅变质岩是一种岩性单调、变形强烈 ,既不同于中深变质岩又有别于沉积岩的特殊岩类。这种岩类区的填图单位与构造样式的确立不能彼此独立 ,而是互为前提、互相依存的。因此 ,选择什么样的填图方法已成为建全区域地层序列、构造格架的关键。由于对这种特殊性缺乏充分的认识 ,在利用常规填图方法完成的多比例尺地质图编制 1:2 5万地质图时应予以慎重对待。实践证明 ,华南前震旦纪至少存在 2～ 3个世代的叠加褶皱 ,这是现今区调中应当引起注意的问题。本文对“构造岩带”、“韧性剪切带”、“非史密斯”
Presinian metamorphic rock in south China is a special rock having simple lithology and intensity deformation. The rock differs from sedimentary rock and metamorphic rock. We can't isolate to study the mapping units and structure-type, for the relation of them is interdepened and interworked. So it is very important to choose mapping methods. Because of incomprehensive to particularity of metamorphic rock, the authors consider that it should be careful to compile 1:25000 map based on structure-type from completed multi-scale geological map. The fact shows that in Presinian there is superposed fold of two-three generations in south China at least. The paper also discusses the following problems, such as tectonite zone ,ductile shear zone and non-smith,as well as on how to study the basic geological problems of the Presinian in south China.
出处
《资源调查与环境》
2002年第2期79-83,共5页
Resources Survey & Environment
基金
国家地质调查项目 :H5 0E0 16 0 12 (田坂街幅 )
H5 0E0 170 12 (游城幅 ) 1:5万区域地质调查项目资助。
关键词
地质填图
前震旦纪
浅变质岩
填图方法
地层序列
构造样式
华南地区
Presinian
epimetamorphic rock
method of mapping
stratigraphical sequence and structure-type
south China
