摘要
祁阳弧的成型和侏罗山式褶皱的发育,是在东西向挤压应力场作用下,盖层与前泥盆系基底之间的滑脱造成的。盖层内抗变形能力不同的海相地层在构造推挤和重力滑动中形成了多期次、多方向的滑脱构造。根据滑脱构造特征,涟源凹陷可划分为东部、中部和西部三个分区。
The shaping of Qiyang arc and the development of Jura-type folds are resulted from the decollement between pre-Devonian basement and its cover under eastwest compressive stress field. The marine strata with different anti-deformability in the cover formed polydirectional and polyphase decollements under the tectonic compression and gravitational sliding. According to the feature of the decollement,Lianyuan sag can be divided into 3 subregions,i.e,east part,central part and west part.
出处
《湖南地质》
1989年第2期10-17,共8页
Hunan Geology
关键词
连源
凹陷
滑脱构造
褶皱
Lianyuan sag
Decollement
Jura-type fold
Imbricate fault
Steplike strttcture pattern
