Fluvial evolution in a growing thrust-fold range of the Yumu Shan, NE Tibetan Plateau

doi:10.1016/j.epsl.2022.117704

	Fluvial evolution in a growing thrust-fold range of the Yumu Shan, NE Tibetan Plateau
	Hu, Xiaofei 1; Wu, Jiakun 1; Wen, Zhenling2 ; Zhang, Jiaxin 1; Zhao, Qiming 1; Pan, Baotian 1
	2022-09-15
发表期刊	Earth and Planetary Science Letters
卷号	594
摘要	In an active thrust-fold belt, the drainage evolution, such as the alternation between transverse and longitudinal rivers, will influence the surface erosion within the range and the sedimentary sequence in the foreland basin. However, knowledge of the controls of changes in transverse or longitudinal drainage patterns in an uplifting range is limited. The Yumu Shan, on the northeastern margin of the Tibetan Plateau, is an example for a young and active thrust-fold range that shows evidence for drainage reversals since ∼3 Ma. The materials we used are the late Cenozoic depositional sequences around the Yumu Shan. Analyses of the lithology, grain size, roundness, and clast orientation of gravel deposits on the northern and southern flanks, combined with the results of cosmogenic nuclide burial dating, reveal that a transverse river, the Liyuan River, crossed the Yumu Shan range during 3.0–1.8 Ma by eroding weak Cenozoic sedimentary rocks. After 1.8 Ma, however, this transverse river was deflected and flowed along the edge of the range, and a longitudinal river developed along the back flank of the range. This process was synchronous with the exposure of resistant Paleozoic rocks by the continuous uplift of the range. After comparison with other potential controlling factors for drainage reversals, such as variations in rock uplift, climate or upstream aggradation, we find that the change in bedrock resistance was the most likely control on the change from a transverse to a longitudinal drainage pattern in this relatively young thrust-fold belt. Furthermore, through comparison with a series of active fold-thrust belts worldwide, we propose a simple conceptual model for the drainage evolution of active fold-thrust belts. In the earlier stage of the uplift, the exposed soft sedimentary rocks will cause transverse (antecedent) rivers to cross the range. After the continuous uplift of the range, resistant rocks cause the deflection of a transverse river and its change to a longitudinal river along the back flank of the range. In the final stage, after the several million years to around ten million years of uplift, with the development of a mature range, the local base level of the foreland will greatly fall, promoting a return to a transverse drainage pattern by headward erosion and capture of longitudinal rivers. © 2022 Elsevier B.V.
关键词	Catchments Climate change Drainage Grain size and shape Lithology Sedimentary rocks Sedimentology Cosmogenic burial dating Cosmogenics Drainage patterns Fluvial sediment Fold belts Fold-thrust belts Longitudinal river Thrust-fold belt Tibetan Plateau Transverse river
DOI	10.1016/j.epsl.2022.117704
收录类别	EI ; SCIE
ISSN	0012-821X
语种	英语
WOS研究方向	Geochemistry & Geophysics
WOS类目	Geochemistry & Geophysics
WOS记录号	WOS:000830918100002
出版者	Elsevier B.V.
EI入藏号	20222912372664
EI主题词	Rivers
EI分类号	443.1 Atmospheric Properties ; 481.1 Geology ; 482.2 Minerals
原始文献类型	Journal article (JA)
EISSN	1385-013X
引用统计	被引频次：10[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.lzufe.edu.cn/handle/39EH0E1M/33203
专题	财税与公共管理学院
作者单位	1.Key Laboratory of Western China's Environmental Systems (Ministry of Education), College of Earth and Environmental Sciences, Lanzhou University, Lanzhou; 730000, China; 2.Lanzhou University of Finance and Economics, Lanzhou; 730020, China
推荐引用方式 GB/T 7714	Hu, Xiaofei,Wu, Jiakun,Wen, Zhenling,et al. Fluvial evolution in a growing thrust-fold range of the Yumu Shan, NE Tibetan Plateau[J]. Earth and Planetary Science Letters,2022,594.
APA	Hu, Xiaofei,Wu, Jiakun,Wen, Zhenling,Zhang, Jiaxin,Zhao, Qiming,&Pan, Baotian.(2022).Fluvial evolution in a growing thrust-fold range of the Yumu Shan, NE Tibetan Plateau.Earth and Planetary Science Letters,594.
MLA	Hu, Xiaofei,et al."Fluvial evolution in a growing thrust-fold range of the Yumu Shan, NE Tibetan Plateau".Earth and Planetary Science Letters 594(2022).