Diverse fluvial aggradation and incision response to interglacial-Glacial transitions in the headwaters of the Yangtze River, SE Tibetan Plateau
文献类型：期刊论文
| 作者 | Yu, Yang2; Wang, Xianyan2; Yang, Xun1 ; Yi, Shuangwen2; Lu, Huayu2
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| 刊名 | GEOMORPHOLOGY
 |
| 出版日期 | 2024-11-15 |
| 卷号 | 465页码:14 |
| 关键词 | Fluvial terraces OSL dating Aggradation and incision Diverse erosion mechanisms Climatic transitions The headwaters of the Yangtze River |
| ISSN号 | 0169-555X |
| DOI | 10.1016/j.geomorph.2024.109418 |
| 英文摘要 | As a key geomorphic archive, staircase sequences of terraces and sediments record the history of fluvial aggradation and incision, which are related to tectonic activities, climatic fluctuations, and varying base levels. While numerous studies have investigated their influence on the formation of fluvial terraces, the manner in which rivers adapt to diverse climatic transitions (specifically, the shifts from warm to cold and from cold to warm) remains a subject of ongoing debate, particularly when considered within varying tectonic and climatic contexts. Here, we address this issue by reconstructing terrace distributions and identifying sedimentary features with OSL dating in the headwaters of the Yangtze River in the southeastern Tibetan Plateau. We discovered two distinct sets of thick valley-filling sequences at different elevations indicating two phases of aggradation during the penultimate and last glacial periods, when the Yangtze River was in a transport-limited condition. During the warmer interglacial and deglacial periods, increased monsoon precipitation led to higher discharge, causing the river to incise into these valley fills. In addition, superimposed tectonic activities produced diverse river response to the climatic transition from interglacial to glacial between the upstream shallow valley and the downstream deeply incised gorge. In the upper valley, stable tectonic conditions resulted in minimal incision, with younger deposits overlying older ones. Conversely, in the downstream gorge, with more intense tectonic activities, sediments only partially covered the riverbed. These sediments acted as abrasion tools, facilitating rapid incision during the warm-to-cold transition, thereby creating two separated valley fills. This finding enhances our understanding of how tectonic forces influence river responses to interglacial-glacial cycles. |
| WOS关键词 | STRATH-TERRACE FORMATION ; SEDIMENT-FLUX ; VALLEY ; UPLIFT ; SHAN ; CLIMATE ; RECORD ; PLEISTOCENE ; LANDSCAPES ; PROTOCOL |
| 资助项目 | Foundation of China[42201001] ; Foundation of China[42021001] |
| WOS研究方向 | Physical Geography ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:001309887200001 |
| 出版者 | ELSEVIER |
| 资助机构 | Foundation of China |
| 源URL | [http://ir.idsse.ac.cn/handle/183446/11392]  |
| 专题 | 深海科学研究部_深海地球物理与资源研究室 |
| 通讯作者 | Wang, Xianyan |
| 作者单位 | 1.Chinese Acad Sci, Inst Deep Sea Sci & Engn, Sanya 572000, Peoples R China 2.Nanjing Univ, Frontiers Sci Ctr Crit Earth Mat Cycling, Sch Geog & Ocean Sci, Nanjing 210023, Peoples R China |
| 推荐引用方式 GB/T 7714 | Yu, Yang,Wang, Xianyan,Yang, Xun,et al. Diverse fluvial aggradation and incision response to interglacial-Glacial transitions in the headwaters of the Yangtze River, SE Tibetan Plateau[J]. GEOMORPHOLOGY,2024,465:14. |
| APA | Yu, Yang,Wang, Xianyan,Yang, Xun,Yi, Shuangwen,&Lu, Huayu.(2024).Diverse fluvial aggradation and incision response to interglacial-Glacial transitions in the headwaters of the Yangtze River, SE Tibetan Plateau.GEOMORPHOLOGY,465,14. |
| MLA | Yu, Yang,et al."Diverse fluvial aggradation and incision response to interglacial-Glacial transitions in the headwaters of the Yangtze River, SE Tibetan Plateau".GEOMORPHOLOGY 465(2024):14. |
入库方式： OAI收割
来源：深海科学与工程研究所
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