三峡地区滑坡与构造运动、气候变化的关系

RELATIONSHIP OF LANDSLIP WITH TECTONIC MOVEMENT AND CLIMATIC CHANGE IN YANGTZE THREE GORGES

滑坡是三峡地区最主要的地质灾害之一。三峡地区滑坡的形成和发展的阶段性及间歇性与新构造抬升运动的阶段性密切相关。同时，测年资料表明，大部分滑坡发生于第四纪暖湿气候期。由于河流阶地是间歇性新构造抬升的产物，其形成阶段又与气候的冷暖变化相关，即冷期阶地陡坎形成，暖期阶地堆积物形成。因此，河流阶地的形成过程，是分析河谷区滑坡地貌过程的基础。

Landslip is one of the most important geologic hazards in Three Gorges area.The formation of the landslip and its development are closely related to the stages of neotectonic movement in interrupted uplifting.The datings show that most landslips occurred in Quaternary warm and wet climate stages.Because the river terrace is the result of interrupting neotectonic uplift and its forming stages are bound up with the geologic climate cold warm changes,i.e.scarps form in cold stage,cumulates form in warm stage.Therefore,the forming process of terrace is the basis of landslip geomorphic process research in valley area.