【摘要】 从第四纪沉积特征出发,利用岩石矿物成分和结构间的差别及玄武岩和砂砾石年龄之间的差异,结合长白山地区的大地构造环境,得出该区玄武岩后的冷凝环境和第四纪的沉积环境;并结合该区火山、地震的活动规律,对该区复杂的新构造运动进行了复原。即该区地壳在近20万年以来,不仅经历上升和稳定状态的多次交替,且地壳每次上升的幅度和速度各异,稳定时期持续的时间也有差异,这表明地壳活动度的脉动性。由此构造活动形成的地貌和河流阶地的类型极其复杂。更多还原

【Abstract】 Through analyzing mineral constituent and fabric differences, age difference between basalts and gravels and geotectonic enviroment of Changbai Mountain Area, the freezing enviroment of basalts and Quaternary deposit enviroment are presented. Based on the complex volcanic and seismic activities, the geotectonic movements in this area are restored. In the last 0.2 Ma,this area had some lifting and stable states alternatively. The amplitudes and velocities are different. Each duration of stable state is different from others. It indicates the impulsiveness of crustal motion. The landform and stream terrance formed by above mentioned activities are extremely complex.更多还原