中国东部拉张区正断层的几何学和运动学特征与盆地动力学过程

中国东部拉张区变形期间发育的正断层,按其几何形态和运动学特征的差异,可确定为四种类型:1.非旋转平面状正断层;2.旋转平面状正断层;3.犁状正断层;4.低角度正断层或滑脱断层。它们及其组合控制着沉积盆地的外部轮廓、规模大小、沉积建造类型和内部变形以及油气构造的形成。本文综合分析了各类正断层特征及其演化过程,认为不同层次、不同尺度和不同类型正断层的发育过程,也是中国东部地壳拉伸变薄及沉积盆地的形成过程。

GEOMETRIC AND KINEMATIC CHARACTERISTICS OF NORMAL FAULTS AND DYNAMIC PROCESSES OF BASINS IN EXTENSION AREA IN EAST CHINA

Based on geometric and kinematic characteristics the normal faults in East China can be grouped into four kinds.1,non-rotational planar normal tault;2, rotational planar normal fault; 3, listric normal fault; and 4, low angle normal fault or detachment fault. They control the configuration, size, sedimentation, and deformation of the basin and so the formation of oil traps. Through analyses of the normal faults. We come to the conclusion that the basins in East China were resulted from the normal faulting process in zones suffered extension and thining of the earth crust.