Time response of river evacuation of great earthquake-induced landslide mass in the Longmen Shan region: a cast study of the 2008 Wenchuan great earthquake
文献类型：期刊论文
| 作者 | Liu Feng; Fu Bi-Hong; Yang Shun-Hu |
| 刊名 | CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION
 |
| 出版日期 | 2013-05-01 |
| 卷号 | 56期号:5页码:1517-1525 |
| 关键词 | Wenchuan earthquake Earthquake-induced landslide Evacuation time Geomorphic evolution Asthenospheric upwelling Longmen Shan |
| ISSN号 | 0001-5733 |
| DOI | 10.6038/cjg20130510 |
| 文献子类 | Article |
| 英文摘要 | Great earthquakes play an active role in geomorphic evolution of orogenic belts, and the time response of river evacuation of landslide mass induced by great earthquakes is a key aspect in the field of tectonic geomorphology. Here we quantitatively estimate the time response of unloading of the coseimsic landslide mass and sediments due to the 2008 Wenchuan great earthquake by the Minjiang River, flowing across the NE-trending Longmen Shan belt in easternmost Tibet. Assuming a steady state transport capacity of landslide mass the same as that of the modern Minjiang River, our results indicate that a full withdrawal of the landslide mass generated by the Wenchuan earthquake needs to take 3100 years. This timescale is similar to the recurrence interval of great seismic events (similar to 3000 years) like the 2008 Wenchuan earthquake in central Longmen Shan. Such consistency suggests an approximate balance between production and erosion of coseismic landslide mass within the recurrence interval of great seismic events in this region. This process of mass unloading may also cause isostatic rebound of the crust beneath this region in addition to other surface processes. The consequent uplift, together with the tectonic shortening and uplift caused by repeated large seismic events, collectively result in the steepest topographic margin in the eastern margin of the Tibetan plateau. Recent geophysical imaging shows a potential of upwelling of asthenospheric materials beneath this region that we interpret as a result of rapid surface unloading induced by repeated great earthquakes. |
| WOS关键词 | TIBETAN PLATEAU ; SURFACE RUPTURE ; CENTRAL TAIWAN ; MOUNTAIN BELT ; UPPER-MANTLE ; FAULT ZONE ; INCISION ; TOMOGRAPHY ; SICHUAN ; UPLIFT |
| WOS研究方向 | Geochemistry & Geophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000319781400010 |
| 出版者 | SCIENCE PRESS |
| 源URL | [http://ir.iggcas.ac.cn/handle/132A11/88042]  |
| 专题 | 中国科学院地质与地球物理研究所 |
| 通讯作者 | Liu Feng |
| 作者单位 | Chinese Acad Sci, CAS Inst Geol & Geophys, Key Lab Earths Deep Interior, Beijing 100029, Peoples R China |
| 推荐引用方式 GB/T 7714 | Liu Feng,Fu Bi-Hong,Yang Shun-Hu. Time response of river evacuation of great earthquake-induced landslide mass in the Longmen Shan region: a cast study of the 2008 Wenchuan great earthquake[J]. CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,2013,56(5):1517-1525. |
| APA | Liu Feng,Fu Bi-Hong,&Yang Shun-Hu.(2013).Time response of river evacuation of great earthquake-induced landslide mass in the Longmen Shan region: a cast study of the 2008 Wenchuan great earthquake.CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION,56(5),1517-1525. |
| MLA | Liu Feng,et al."Time response of river evacuation of great earthquake-induced landslide mass in the Longmen Shan region: a cast study of the 2008 Wenchuan great earthquake".CHINESE JOURNAL OF GEOPHYSICS-CHINESE EDITION 56.5(2013):1517-1525. |
入库方式： OAI收割
来源：地质与地球物理研究所
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