Study on the Characteristics, Mechanism, and Spatial Distribution of Yushu Earthquake Triggered Landslides
详细信息
- 责任者：Xu Chong (Key Laboratory of Active Tectonics and Volcano ; Institute of Geology ; China Earthquake Administration ; Beijing 100029 ; China) ; Xu Xiwei
- 刊名：Seismology and Geology
- 出版年：2012
- 卷期：34(1)
- 关键词：滑坡 ; landslides ; 青海 ; Qinghai Province
- 页码：p.47-62
- 图表：16 illus., 10 refs.
- 分类号：1800
- issnNo：ISSN0253-4967
- isbnNo：CN11-2192/P
摘要
On April 14,2010 at 07:49(Beijing time),a catastrophic earthquake with MS 7.1 struck Yushu County,Qinghai Province,China.About 2036 landslides,covering an area of about 1.194km2,were interpreted from aerial photographs and remote sensing imageries and verified by field check.And based on the above,the spatial distribution of the Yushu earthquake triggered landslides is presented in this paper.The distribution of the landslides was strongly dominated by main surface ruptures,and their types are varied,with the collapse-type landslide as the dominant.There are five genetic mechanisms of Yushu earthquake triggered landslides,they are:the slope-toe excavation type,the surface water infiltration induced slope slip type,the fault dislocation type,the shaking type,and postquake snow melting and rainfall penetration type.Besides the main seismic surface ruptures,there are many slope fissures developed mainly on the SE end of the surface rupture zone on the SW wall,an area undergoing intensive compression in the earthquake.
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