摘要
在多期伸展体制下形成的勒巴泉变质核杂岩构造,具有3层结构的特征,即结晶基底、中间韧性盖层、上部脆性盖层,其间分别被基底剥离断层和盖层剥离断层分割。本文重点论述了变质核杂岩的组成、空间展布、结构构造和典型的构造样式,并分析了变质核杂岩构造的形成时代和大地构造背景。
The metamorphic core complex of Lebaquan is formed at multiple stage extensional structure system, and is characterized by a threelayer texture:crystalline basement, middle shear coverlayer and upper brittle coverlayer.And the three layers are divided by basement denudational fault and coverlayer denudational fault The paper mainly deals with material formation, texture and typical tectonic style, and analyses the formation age and tectonics background
出处
《西北地质》
CAS
CSCD
2003年第2期30-34,共5页
Northwestern Geology
基金
中国地质调查局"甘肃马鬃山-北山造山带及非史密斯地层区1:25万区域地质填图及方法研究"项目成果(编号:19961300010101)
关键词
甘肃北山地区
变质核杂岩
剥离断层
伸展构造
Beishan, Gansu
metamorphic core complex
denudational fault
extensonal structure
