Local structural and geomorphological controls on landsliding at the Leigu restraining bend of the Beichuan-Yingxiu fault system during the 2008 M-w 7.9 Wenchuan earthquake
文献类型：期刊论文
| 作者 | Yuan, Renmao1; Wang, Ying1; Jin, Jialiang1,2; Cunningham, Dickson3 |
| 刊名 | LANDSLIDES
 |
| 出版日期 | 2019-12-01 |
| 卷号 | 16期号:12页码:2485-2498 |
| 关键词 | 2008 Wenchuan earthquake Leigu landslide Longmenshan Restraining bend Beichuan fault |
| ISSN号 | 1612-510X |
| DOI | 10.1007/s10346-019-01264-x |
| 通讯作者 | Yuan, Renmao(yuanrm@gmail.com) ; Cunningham, Dickson(cunninghamw@easternct.edu) |
| 英文摘要 | The 2008 M-w 7.9 Wenchuan, China, earthquake produced many damaging landslides in the Longmenshan region along the eastern margin of the Tibetan Plateau, China. Among the thousands of reported landslides, some are geologically notable because of their close spatial relationship to local fault rupture complexities. The Leigu landslide is particularly interesting because it formed at a restraining bend along the Beichuan-Yingxiu fault system in a structural position that favored hill-slope collapse because of a variety of preexisting structural and geomorphological conditions. The 2008 landslide reactivated an older landslide that is indicated by a preserved paleo-scarp upslope from the main 2008 event scarp. Our field and analytical results coupled with a review of existing geological information on the region indicate that the landslide site is located between two regional folds with opposing plunge directions and that the restraining bend is the displacement transfer zone between two parallel, but offset segments of the Beichuan-Yingxui Fault system. In addition, NE-oriented steep joints were reactivated as slip surfaces in the upper slopes of the landslide area within an anticline hinge zone that focuses vertical uplift. Steep valley walls due to incision of the antecedent Laochangkou River and abundant rainfall during the earthquake period, combined with intense seismic acceleration were contributing factors to the landslide event. During the earthquake, approximately equal components of strike-slip and SEdirected thrusting occurred on surface ruptures within the bend, offsetting older landslide deposits and man-made structures. Field results indicate that sliding was facilitated by loose unconsolidated materials from the previous landslide that were remobilized above a soft, low-friction basal slip surface. The Leigu landslide provides an important case study for evaluating potential landslide hazards close to active fault systems where complex 3-D structural geometries and high-relief, steep terrain combine to generate significant ground instability during large magnitude earthquakes. |
| WOS关键词 | LONGMEN SHAN ; TIBETAN PLATEAU ; EASTERN TIBET ; EVOLUTION ; RUPTURE ; TOPOGRAPHY ; MOTIONS ; RANGE ; CHINA |
| 资助项目 | Basic Science Fund of the Institute of Geology, China Earthquake Administration[IGCEA-1604] ; Basic Science Fund of the Institute of Geology, China Earthquake Administration[IGCEA-1609] ; National Meteorological Information Center of China |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000509669500015 |
| 出版者 | SPRINGER HEIDELBERG |
| 资助机构 | Basic Science Fund of the Institute of Geology, China Earthquake Administration ; National Meteorological Information Center of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/131375]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Yuan, Renmao; Cunningham, Dickson |
| 作者单位 | 1.China Earthquake Adm, Inst Geol, Key Lab Act Tecton & Volcano, Beijing 100029, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 3.Eastern Connecticut State Univ, Dept Environm Earth Sci, 83 Windham St, Willimantic, CT 06226 USA |
| 推荐引用方式 GB/T 7714 | Yuan, Renmao,Wang, Ying,Jin, Jialiang,et al. Local structural and geomorphological controls on landsliding at the Leigu restraining bend of the Beichuan-Yingxiu fault system during the 2008 M-w 7.9 Wenchuan earthquake[J]. LANDSLIDES,2019,16(12):2485-2498. |
| APA | Yuan, Renmao,Wang, Ying,Jin, Jialiang,&Cunningham, Dickson.(2019).Local structural and geomorphological controls on landsliding at the Leigu restraining bend of the Beichuan-Yingxiu fault system during the 2008 M-w 7.9 Wenchuan earthquake.LANDSLIDES,16(12),2485-2498. |
| MLA | Yuan, Renmao,et al."Local structural and geomorphological controls on landsliding at the Leigu restraining bend of the Beichuan-Yingxiu fault system during the 2008 M-w 7.9 Wenchuan earthquake".LANDSLIDES 16.12(2019):2485-2498. |
入库方式： OAI收割
来源：地理科学与资源研究所
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