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Geological and morphological study of the Daguangbao landslide triggered by the Ms. 8.0 Wenchuan earthquake, China

文献类型：期刊论文

作者Cui, Shenghua2,3; Yang, Qingwen2; Pei, Xiangjun2; Huang, Runqiu2; Guo, Bin2; Zhang, Weifeng1
刊名GEOMORPHOLOGY
出版日期2020
卷号370页码:141-157
ISSN号0169-555X
关键词Landslide initiation Co-seismic Daguangbao landslide Pore water pressure Tibet Plateau
DOI10.1016/j.accre.2020.05.005
通讯作者Yang, Qingwen(yangqingwen1991@outlook.com)
产权排序3
文献子类Article
英文摘要Landslides are one of the most significant geomorphic processes in mountainous regions. Recently, a gigantic landslide (Daguangbao (DGB) landslide) with a volume of 1.2 x 10(9) m(3) was triggered by the Ms. 8.0 Wenchuan earthquake, China, and has attracted widespread attention. This landslide (28 degrees 38'16.93 '' E, 104 degrees 06'02.35 '' N) is located 85 km north-northeast (NNE) of the epicenter and on the hanging wall side, 4 km away from the surface rupture zone of the earthquake. Our long-term(2008 - present) study, which includes topographic interpretation and geological and geomorphological investigations, allows us to define the geological model of the DGB landslide and estimate the initiation and traveling mechanisms. The topography was studied by using high-resolution digital elevation models. Arial images and abundant photos at different scales are used to performed geomorphological analysis. The geology in the landslide area was studied by exploratory trenches, a tunnel, and terrestrial laser scanning (TLS). The results show that the mass movement destabilized a folded slope along a deep-seated (average depth of 400 m) bedding fault developed in the dolomite of the Sinian Formation. The morphology of the landslide main scarp is characterized by steep (55-75 degrees) and high (up to 730 m) release surfaces, resulting from the linkage of three joint sets. An excess pore-water pressure-dependent loss of shear strength at the basal layer during the earthquake is assumed to have favored landslide initiation. An internal shear running subparallel to the stratification surface is confirmed to have dominated the longitudinal mobility of the landslide and driven landslide mass thrusting to a height of 500 m on the slopes on the other side of the valley. The DGB landslide, as a transient destabilization and morphogenesis event, has largely contributed to erosion in the study area. (C) 2020 Elsevier B.V. All rights reserved.
WOS关键词BRITTLE ROCK FRACTURE ; SLOPE-FAILURE ; EVOLUTION ; SLIDE ; BELT
资助项目National Nature Science Foundation of China[41931296] ; National Nature Science Foundation of China[41907254] ; National Nature Science Foundation of China[41521002] ; National Key R&D Program of China[2017YFC1501002]
WOS研究方向Physical Geography ; Geology
语种英语
出版者ELSEVIER
WOS记录号WOS:000557026600009
资助机构National Nature Science Foundation of China ; National Key R&D Program of China
源URL[http://ir.imde.ac.cn/handle/131551/50727]  
专题山区减灾工程技术研究中心
通讯作者Yang, Qingwen
作者单位1.Key Laboratory of Mountain Hazards and Earth Surface Process/Institute of Mountain Hazards and Environment, Chinese Academy of Sciences (CAS), No. 9, Block 4, South Renmin Road, Chengdu 610041, China
2.State Key Laboratory of Geohazard Prevention and Geoenvironment Protection, Chengdu University of Technology, Chengdu 610059, China;
3.Disaster Prevention Research Institute, Kyoto University, Uji, 6110011, Kyoto, Japan;
推荐引用方式
GB/T 7714		 Cui, Shenghua,Yang, Qingwen,Pei, Xiangjun,et al. Geological and morphological study of the Daguangbao landslide triggered by the Ms. 8.0 Wenchuan earthquake, China[J]. GEOMORPHOLOGY,2020,370:141-157.
APA Cui, Shenghua,Yang, Qingwen,Pei, Xiangjun,Huang, Runqiu,Guo, Bin,&Zhang, Weifeng.(2020).Geological and morphological study of the Daguangbao landslide triggered by the Ms. 8.0 Wenchuan earthquake, China.GEOMORPHOLOGY,370,141-157.
MLA Cui, Shenghua,et al."Geological and morphological study of the Daguangbao landslide triggered by the Ms. 8.0 Wenchuan earthquake, China".GEOMORPHOLOGY 370(2020):141-157.

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来源：成都山地灾害与环境研究所

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