摘要
在 1∶ 2 5万区调的基础上 ,详细论述了平头山逆冲推覆构造的几何学、运动学、动力学特征。平头山逆冲推覆构造由北向南逆冲 ,具有前展式的扩展方式 ,形成时代为志留纪末期至泥盆纪初期 ,是早古生代弧 -陆碰撞造山带前陆地区的主要构造样式。印支期的构造运动改变了逆冲推覆构造的初始位态 。
Based on 1∶250000 scale regional geological surveys, the paper describes in detail the geometrical,kinematical and dynamical characteristics of Pingtoushan thrust-nappe structure.The thrust is from north to south in direction and the extension pattern of the thrust is pickaback.The thrust-nappe structure of Pingtoushan is formed from end of the Silurian to Early Devonian. It is one of the forms of foreland area of arc-continent collision oroginic belt in the Caledonian stage.In Indosinian Stage, the tecnotic movement changed original position of thrust-nappe structure,and formed the present complex tectonic framework.
出处
《西北地质》
CAS
CSCD
2002年第1期22-27,共6页
Northwestern Geology
基金
原地矿部 1: 2 5万区域地质调查试点图幅及填图方法研究项目成果
关键词
甘肃北山
造山带
逆冲推覆构造
构造格局
Gansu
Beishan
oroginic belt
thrust-nappe structure
tectonic framework
