摘要
论文总结了三峡库区的新构造活动规律及其与滑坡之间的关系。三峡库区新构造运动呈现出良好的阶段性 ,具体表现为 :地壳快速隆升期与相对稳定的阶地发育期相间 ,断裂活动、地震活动活跃期与宁静期相间。滑坡也具有阶段性 ,并且与构造活动阶段性之间有一一对应关系 ,即滑坡的高峰期对应着构造活动的高峰期。这些说明 ,在新构造期构造活动因素在三峡滑坡的发育过程中起着重要的作用。依据地震的活动周期显示 ,在未来的一定时期内构造活动处于平静期 ,人类活动可能成为滑坡的主要影响因素。
Relationship between landslides and neotectonism in reservoir area of Three-Gorges Project on Yangtze River were examined. The neotectonism exhibits well staged character reflecting in alternate crustal uplifting and relatively stable periods and alternate faulting and seismo-active periods.The sliding events of landslides are also staged and are well correlated with the neotectonic stages. The occurrence times of landslides coincide with neotectonic activity stages. From the results we can conclude that the neotectonic factor plays an important role in sliding of landslides in the Three-Gorges area. The seismo-active periodicity indicates that the neotectonism has entered into a quiet stage since 1980s. The internal factors for structural activities may be comparatively insignificant for the occurrence of landslides in a relatively long-term future. It is suggested that the human activity may be a main factor causing landslide to occur. This must be taken into adequate consideration in the reservoir area of the Three-Gorges Project on Yangtze River.
出处
《工程地质学报》
CSCD
2000年第2期136-141,共6页
Journal of Engineering Geology
基金
国家移民局
湖北省计委
湖北省科委联合资助项目! (No. 971P2 0 0 8)
关键词
长江三峡库区
构造活动
滑坡
地震活动
Three-Gorges of the Yangtze River, Neotectonism, Landslide, Seismicity.
