甘肃北山平头山逆冲推覆构造的特征

The feature of Pingtoushan thrust-nappe structure in Beishan, Gansu

Lanzhou Research Institute of Geology and Mineral Resources, Gansu Bureau of Geology and Mineral Exploration and Development, Lanzhou 730050, China

摘要: 在1:25万区调的基础上,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,形成现今复杂的构造格局。
- 甘肃北山 /
- 造山带 /
- 逆冲推覆构造 /
- 构造格局
Abstract: 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 a rea of arccontinent 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 frame-work.
- Gansu /
- Beishan /
- oroginic belt /
- thrust-nappe structure