从地震信息看中国推覆与滑覆构造

推覆与滑覆构造的基本要素是清脱层，都是沿软弱面发生的。前者是受构造力作用形成的，后者是受重力作用形成的。推覆构造又可分为褶驶推覆和道冲推覆。褶皱推覆一般多发生在塑性地层一，其道冲断面与语皱构造一起发生；逆冲推覆一般多发生在脆性、半脆性为主的岩层中，其岩体逆冲未经过事先褶皱作用的逆冲断裂运动。滑覆构造是由于盆地沉降、斜坡的翘起，使沉积体沿斜坡滑脱面滑移而形成的逆冲构造样式。

Analysing nappe and slumped overthrust in China by seismic data interpretation

The essential of nappe and slumped overthrust is detachment surface, which stretches along weak formation. The former was generated by the tectonic force,and the latter by the gravity- Nappe has two types:fold nappe and overthrust nappe. The fold nappe usually appears in plastic formation,its fault surface and fold structure were created simultaneously. The overthrust nape was mostly caused in fragile and half fragile formations, lts overthrust mass had not undergone any folding yet. Slumped overthrust was formed because sedimentary mass moved along tilting slope (detachment surface)of a subsiding basin.