Preliminary Study on Characteristic and Mechanism of Super-Large Landslides in
详细信息
- 责任者：Yin Zhiqiang (China Institute of Geo-Environment Monitoring ; Beijing 100081 ; China) ; Cheng Guoming
- 刊名：Journal of Engineering Geology
- 出版年：2010
- 卷期：18(1)
- 关键词：古滑坡 ; fossil landslides ; 青藏高原 ; Qinghai-Tibetan Plateau
- 页码：p.41-51
- 图表：illus., 4 tables, 30 refs.
- 分类号：1702
- issnNo：ISSN1004-9665
- isbnNo：CN11-3249/P
摘要
This paper studies the paleo-landslides and present landslides that occurred in the upper Yellow River since Late-Pleistocene. The characteristics of spatial and temporal distribution of the landslide and the coupling relationship between landslide active periods and climate changes and the climate change-driven mechanism of landslide are analyzed in detail. It is found that:1)the landslide development is closely related to the climate changes; 2)there are 205 landslides distributed from Liujia Gorge to Longyang Gorge in the main stream of upper Yellow River; and 3)there are three active periods of Paleo-landslides and debris flows in the region from Longyang Gorge to Liujia Gorge of Yellow River. The study shows that the Gonghe tectonic movement caused the region uplift and in turn strong down-cutting erosion occurred along the river to form 300～600 m steep slopes. In addition, the rapid climatic fluctuation in the LGM induced the landslide development in the first stage. During the 3～8 ka B.P. of Holocene Optimal, strong monsoonal rainfall and a large of melted snow and ice converged into Yellow River, which led the landslide development of the second stage. The present landslides were mainly trigged by the human activities.
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