漠河逆冲推覆构造中段地质特征与构造演化

依据近年来区域地质调查的成果,漠河逆冲推覆构造中段的典型构造为逆冲叠瓦状断层、紧闭尖棱褶皱、倒转褶皱及反冲断层形成的冲起构造和隔挡式褶皱。这些构造显示指向SSE的变形。结合同位素资料,认为漠河逆冲推覆构造形成的时代为晚侏罗世晚期—早白垩世早期。其形成与中亚蒙古-鄂霍茨克构造带晚期造山时代和动力学背景一致。

Geological characteristics and tectonic evolution of the middle segment of Mohe thrust nappe

Geological investigation shows that the middle segment of the Mohe over-thrust nappe system is a typical over-thrust model, which includes imbricated reversal faults, pressed sharp edge folds, reversal folds, thrust deformation zones, and barrier folds. The structural deformation is in the SSE direction. Recently, the isotope studies show that the activities of the Mohe over-thrust nappe system occurred during the period from the late Late Jurassic to the early Early Cretaceous. The nappe belt and the Mongolia-Okhotsk tectonic unit have the same orogenic period and the same dynamics background.