【摘要】 滑坡是三峡地区主要的地质灾害之一。三峡地区滑坡形成及发展的阶段性与新构造活动密切相关,与气候的冷暖变化也有密切关系。在系统收集三峡地区断裂活动同位素测试年龄的基础上,做出了断裂活动的年龄分布直方图。与滑坡年代分布对比发现,断裂活跃峰期与滑坡活跃峰期相间分布,后者明显滞后于前者;与气候期对比发现,断裂活跃期多对应于气候的由暖转冷阶段。综合分析表明,断裂活跃峰期的构造活动主要为后期滑坡的发生准备了充分的条件,而暖湿气候环境的强降水及地震活动,则是触发滑坡发生的主要因素。更多还原

【Abstract】 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,and has relation to the climate change.Based on the large amount of isotope ages of the fault in area of Three Gorges,we make out the distribution histogram of fault activty ages.Through contrast with distribution of landslip ages and climate periods,find that the peak period of landslip acties lagged behind the fault activeness peak period obviously,and the period of fault activty corresponding to the period in which the climate from warm changed into cold.Comprehensive analysis showed that tectonic activity in the peak period of fault active mess mainly prepared conditions for the qenesis of landslips.Moreover the heavy rainfall and seismic activity in the environment of warm climate were the main factors which triggered landslips.更多还原