摘要
在以晚前寒武纪变质深成岩占主体的粤西云开陆块中 ,同岩异化现象十分普遍。由于遭受了不同构造层次和不同变形相韧性流动剪切变形改造 ,使原本为同一岩石单元的侵入体被分解为若干种不同结构构造和矿物含量的岩石类型 ,据以进行岩石单元划分时 ,出现了错误。从构造变形分解思路入手 ,通过构造物理和构造化学过程分析 ,总结了本区同岩异化的特点、识别标志和填图方法 ,提出云开地区高绿片岩相条件下原岩为花岗岩的构造片岩与原岩为泥质岩的副片岩区别的七条标志。
Petrologic reconstruction of metamorphic intrusive rocks (gneissic complex) is very important in geologic mapping of Yunkai area. Because of several stages of ductile deformation,composition and fabric of these rocks are strongly changed. The structural characteristics,recognizing criteria and mapping methods of metamorphic intrusive rocks are systematically summed up and the relationship between ductile deformation and low grade metamorphism is discussed.
出处
《华南地质与矿产》
CAS
2001年第4期67-72,共6页
Geology and Mineral Resources of South China
