| DOI: | 10.1002/grl.50310
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| 论文题名: | Eroding dynamic topography |
| 作者: | Braun J.; Robert X.; Simon-Labric T.
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| 刊名: | Geophysical Research Letters
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| ISSN: | 0094-9135
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| EISSN: | 1944-8866
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| 出版年: | 2013
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| 卷: | 40, 期:8 | | 起始页码: | 1494
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| 结束页码: | 1499
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| 语种: | 英语
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| 英文关键词: | Andes
; Colorado Plateau
; Dynamic Topography
; Fluvial erosion
; Stream Power Law
; Thermochronology
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| Scopus关键词: | Andes
; Colorado Plateau
; Dynamic topography
; Fluvial erosion
; Stream power
; Thermochronology
; Erosion
; Stratigraphy
; Topography
; Surface topography
; erosion rate
; fluvial deposit
; geological record
; sediment analysis
; sedimentary basin
; wavelength
; Colorado Plateau
; Patagonia
; United States
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| 英文摘要: | Geological observations of mantle flow-driven dynamic topography are numerous, especially in the stratigraphy of sedimentary basins; on the contrary, when it leads to subaerial exposure of rocks, dynamic topography must be substantially eroded to leave a noticeable trace in the geological record. Here, we demonstrate that despite its low amplitude and long wavelength and thus very low slopes, dynamic topography is efficiently eroded by fluvial erosion, providing that drainage is strongly perturbed by the mantle flow driven surface uplift. Using simple scaling arguments, as well as a very efficient surface processes model, we show that dynamic topography erodes in direct proportion to its wavelength. We demonstrate that the recent deep erosion experienced in the Colorado Plateau and in central Patagonia is likely to be related to the passage of a wave of dynamic topography generated by mantle upwelling. Key Points A wave of dynamic topography erodes in proportion to its wavelength Dynamic topography is strongly affected by fluvial erosion Evidence for strong erosion of waves of dynamic topography. ©2013. American Geophysical Union. All Rights Reserved. |
| URL: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-84877999144&doi=10.1002%2fgrl.50310&partnerID=40&md5=33e2cfdd76018e11e285d84f202f6d4d
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| Citation statistics: |
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| 资源类型: | 期刊论文
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| 标识符: | http://119.78.100.158/handle/2HF3EXSE/6399
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| Appears in Collections: | 气候减缓与适应
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作者单位: | ISTerre Université de Grenoble 1, CNRS-IRD, F-38041 Grenoble, France
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| Recommended Citation: | |
Braun J.,Robert X.,Simon-Labric T.. Eroding dynamic topography[J]. Geophysical Research Letters,2013-01-01,40(8).
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