干旱区生态环境知识资源中心(Arid): Erosion around a large-scale topographic high in a semi-arid sedimentary basin: Interactions between fluvial erosion, aeolian erosion and aeolian transport

Arid

DOI	10.1016/j.geomorph.2021.107747
	Erosion around a large-scale topographic high in a semi-arid sedimentary basin: Interactions between fluvial erosion, aeolian erosion and aeolian transport
	Jolivet, M.; Braucher, R.; Dovchintseren, D.; Hocquet, S.; Schmitt, J. -M.
通讯作者	Jolivet, M (corresponding author), Univ Rennes, CNRS, UMR6118, Geosci Rennes, F-35000 Rennes, France.
来源期刊	GEOMORPHOLOGY
ISSN	0169-555X
EISSN	1872-695X
出版年	2021
卷号	386
英文摘要	Large-scale aeolian erosion features such as pans usually develop upon a relatively homogeneous erodible sedimentary rock substratum and show simple concave morphologies. However, some erosional depressions in semi-arid to arid settings develop in more complex geological contexts, associating sedimentary basins and outcrops of non-erodible basement. In semi-arid basins, the geomorphic evolution is controlled by interplay between the processes of fluvial erosion and deposition (especially of the finer sediment fraction in ephemeral lakes) and the processes of aeolian erosion and deflation. The occurrence of non-erodible basement outcrops within a region of overall deflation complicates drainage systems and wind-flow patterns. Both are liable to evolve rapidly through time and their interactions remain poorly understood. In this study, we use a detailed geomorphological analysis, including mapping of the aeolian sand-motion direction within the 16,300 km(2) Tsagaan Els depression (Gobi Desert, Mongolia) as well as in situ-produced cosmogenic Be-10 and Al-26 based quantitative constraints, to propose a conceptual model for the morphologic evolution of geologically complex semi-arid basins. Based on theoretical studies of wind-flow patterns around obstacles, we demonstrate that the occurrence of erosion-resistant basement highs inside the basin induces the localization of preferential deflation zones and aeolian and fluvial carving of large-scale relief. The enhanced deflation zones form sub-depocenters controlling local drainage systems that mobilize clastic material and transport it to the deflation zone. These river systems are frequently captured by neighboring streams, which creates unstable conditions of erosion and deposition. Such rapid modifications of the topography through time affect the hydrogeologic structure of the basin and may impact potential sediment-hosted mineral deposits. (C) 2021 Elsevier B.V. All rights reserved.
英文关键词	Aeolian erosion Fluvial-aeolian interaction Aeolian geomorphology Cosmogenic radionuclides Gobi desert
类型	Article
语种	英语
开放获取类型	Green Published
收录类别	SCI-E
WOS记录号	WOS:000655695000002
WOS关键词	CENTRAL PANNONIAN BASIN ; EAST GOBI BASIN ; QATTARA DEPRESSION ; STRUCTURAL RECORDS ; DUST DEPOSITION ; INNER-MONGOLIA ; COLORADO RIVER ; MOJAVE DESERT ; SAND DUNES ; HALF-LIFE
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
来源机构	French National Research Institute for Sustainable Development ; E17
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350416
作者单位	[Jolivet, M.; Dovchintseren, D.] Univ Rennes, CNRS, UMR6118, Geosci Rennes, F-35000 Rennes, France; [Braucher, R.; Hocquet, S.; Schmitt, J. -M.; ASTER Team] Aix Marseille Univ, CNRS, UMR34 CEREGE, IRD,Coll France,INRAE, Technopole Environm Arbois & Mediterranee,BP80, F-13545 Aix En Provence, France; [Dovchintseren, D.] Orano Min, 1 Pl J Millier, F-92400 Courbevois, France
推荐引用方式 GB/T 7714	Jolivet, M.,Braucher, R.,Dovchintseren, D.,et al. Erosion around a large-scale topographic high in a semi-arid sedimentary basin: Interactions between fluvial erosion, aeolian erosion and aeolian transport[J]. French National Research Institute for Sustainable Development, E17,2021,386.
APA	Jolivet, M.,Braucher, R.,Dovchintseren, D.,Hocquet, S.,&Schmitt, J. -M..(2021).Erosion around a large-scale topographic high in a semi-arid sedimentary basin: Interactions between fluvial erosion, aeolian erosion and aeolian transport.GEOMORPHOLOGY,386.
MLA	Jolivet, M.,et al."Erosion around a large-scale topographic high in a semi-arid sedimentary basin: Interactions between fluvial erosion, aeolian erosion and aeolian transport".GEOMORPHOLOGY 386(2021).