Reconstruction of a Holocene landslide-dammed lake in the Yalong basin, eastern Tibetan Plateau
文献类型:期刊论文
作者 | Wang, Hao4; Yang, Anna3,4; Jiang, Shengfan2; Liu, Nannan1 |
刊名 | FRONTIERS IN EARTH SCIENCE |
出版日期 | 2023-01-19 |
卷号 | 10页码:16 |
ISSN号 | 2296-6463 |
关键词 | landslide-dammed lake sedimentary evidence optically stimulated luminescence dating Yalong river basin Holocene |
DOI | 10.3389/feart.2022.1042581 |
英文摘要 | The failures of natural dams formed by landslides and glaciers in mountain areas have triggered the most destructive flood events on Earth. Outburst floods are effective agents in modifying landscapes, such as carving bedrock gorges and transporting surface masses. Reconstructing the ages and magnitudes of prehistoric landslide damming events allows us to capture the full range of frequencies and magnitudes of similar events and deepen our understanding of the interaction between large landslides and trunk rivers in tectonically active high-relief mountains. Previous studies have revealed many paleo-landslide-dammed lakes in the Yarlung Tsangpo River and its tributaries, the Jinsha River and the Min River. However, most studies associated with paleo-event reconstruction lack an estimation of the extent and volume of paleo-landslide-dammed lakes. The paleo-level of a landslide-dammed lake can be recorded in the variation in the sedimentary sequence and the geometry of the breach channel of a landslide dam. This information has not been fully exploited. In this study, we identified sedimentary evidence formed by an ancient landslide-dammed lake in the Liqiu River, a left-bank tributary of the Yalong River. The 12 exposures that we investigated mainly consist of typical clay or silt varves deposited in deep water and the Bouma sequence deposited by subaqueous turbidity flows, as well as climbing ripples that formed in a near-shore environment. Based on sedimentary analysis, we inferred that the minimal lake volume of this ancient lake was approximately 2.4 x 10(8) m(3), corresponding to a lake level at 3,187 m a.s.l. The maximal lake extent derived from relict dam morphology reveals a lake volume of 3.2 x 10(8) m(3) at the level of 3,200 m a.s.l. An initial drainage that occurred as the lake water overtopped the landslide dam was suggested to explain the small discrepancy in the lake level. The relict lake has remained stable over a long period of time and has accommodated continuous clay varve deposits. Furthermore, the optically stimulated luminescence dating results illustrate that the dammed lake initiated before 7.9 ka BP and persisted until at least 3.9 ka BP. The long-term cumulative coupled effect of tectonic movement and the rapid river incision rate provided favorable conditions for the failure of the Yuting landslide. |
WOS关键词 | UPPER JINSHA RIVER ; OPTICALLY STIMULATED LUMINESCENCE ; FLUVIAL DEPOSITS ; FLOW DEPOSITS ; GROWTH-CURVE ; QUARTZ ; CHRONOLOGY ; OSL ; SEDIMENTS ; INCISION |
资助项目 | Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0906] ; Sichuan Province Science and Technology Support Program[2021YFH0009] ; National Natural Science Foundation of China[41941017] ; National Natural Science Foundation of China[42101083] |
WOS研究方向 | Geology |
语种 | 英语 |
出版者 | FRONTIERS MEDIA SA |
WOS记录号 | WOS:000922816600001 |
资助机构 | Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; Sichuan Province Science and Technology Support Program ; National Natural Science Foundation of China |
源URL | [http://ir.imde.ac.cn/handle/131551/57197] |
专题 | 中国科学院水利部成都山地灾害与环境研究所 |
通讯作者 | Wang, Hao |
作者单位 | 1.Pingdingshan Univ, Hennan Lab Res Cent Plains Ancient Ceram, Pingdingshan, Peoples R China 2.Emergency Management Agcy Laoshan Dist, Qingdao, Peoples R China 3.Univ Chinese Acad Sci, Beijing, Peoples R China 4.Chinese Acad Sci, Inst Mt Hazards & Environm, Chengdu, Peoples R China |
推荐引用方式 GB/T 7714 | Wang, Hao,Yang, Anna,Jiang, Shengfan,et al. Reconstruction of a Holocene landslide-dammed lake in the Yalong basin, eastern Tibetan Plateau[J]. FRONTIERS IN EARTH SCIENCE,2023,10:16. |
APA | Wang, Hao,Yang, Anna,Jiang, Shengfan,&Liu, Nannan.(2023).Reconstruction of a Holocene landslide-dammed lake in the Yalong basin, eastern Tibetan Plateau.FRONTIERS IN EARTH SCIENCE,10,16. |
MLA | Wang, Hao,et al."Reconstruction of a Holocene landslide-dammed lake in the Yalong basin, eastern Tibetan Plateau".FRONTIERS IN EARTH SCIENCE 10(2023):16. |
入库方式: OAI收割
来源:成都山地灾害与环境研究所
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