气候变化领域集成服务门户(CCPortal): The genesis, development, and evolution of original vertical joints in loess

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DOI	10.1016/j.earscirev.2021.103526
	The genesis, development, and evolution of original vertical joints in loess
	Feng L.; Zhang M.; Jin Z.; Zhang S.; Sun P.; Gu T.; Liu X.; Lin H.; An Z.; Peng J.; Guo L.
发表日期	2021
ISSN	00128252
卷号	214
英文摘要	Original vertical joints (OVJs), which are highly correlated with loess anisotropy, have been considered a non-tectonic source of extensive erosion, gully development, and landform fragmentation in loess regions such as the Chinese Loess Plateau. The existing literature discussing the origin of OVJs lacks a systematic overview of the current theories related to OVJ genetic mechanisms, development patterns, theoretical models, and relationships between OVJ morphologies and loess historical sedimentary processes (LHSP) since the Quaternary. By reviewing the key factors governing the formation and evolution of OVJs in loess, we present both a conceptual framework and a case study to demonstrate the genesis and dynamics of OVJs in the loess landscape. We propose that when the driving force produced by the hydro-mechanical coupling regime exceeds the resistance force due to tensile strength, OVJs appear along the boundaries between different structural units within the loess soils. Influenced by the loess sedimentary effects in the later period (i.e., LHSP), such as loess pile thickening, drying-wetting cycles, and weathering, OVJs formed in historical loess frequently degrade and expand. Based on the knowledge of OVJ dynamics, we reconstruct the evolutionary trajectory of OVJs in the loess profile from the LHSP perspective, which is further confirmed by field observations on OVJ morphologies under different local microtopographical and geological conditions. The new perspective on the genesis, development, and evolution of OVJs enhances theoretical understanding of the formation of anisotropy and structural evolution in loess, which helps describe and model subsurface hydrology and geohazard risks in loess regions. © 2021 Elsevier B.V.
关键词	Loess anisotropy Loess landscape Loess morphology Structural evolution Subsurface
英文关键词	anisotropy; conceptual framework; eolian process; geomorphology; loess; Quaternary; sediment transport; China; Loess Plateau
语种	英语
来源期刊	Earth Science Reviews
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/204019
作者单位	State Key Laboratory of Loess and Quaternary Geology, Institute of Earth Environment, Chinese Academy of Sciences, Xi'an, 710075, China; State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resource and Hydropower, Sichuan University, Chengdu, 610065, China; Department of Civil Engineering, School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an, China; Key Laboratory for Geo-hazard in Loess Area, Ministry of Natural Resources, Xi'an Center of China Geological Survey, Xi'an, 710054, China; CAS Center for Excellence in Quaternary Science and Global Change, Xi'an, 710061, China; Aerial Photogrammetry and Remote Sensing Bureau of China National Administration of Coal Geology, Xi'an, 710199, China; University of Chinese Academy of Sciences, Beijing, 100049, China; Department of Geology, Northwest University, Xi'an, 710069, China; Faculty of Geographical Science, Beijing Normal University, Beijing, 100875, China; Department of Ecosystem Science and Man...
推荐引用方式 GB/T 7714	Feng L.,Zhang M.,Jin Z.,et al. The genesis, development, and evolution of original vertical joints in loess[J],2021,214.
APA	Feng L..,Zhang M..,Jin Z..,Zhang S..,Sun P..,...&Guo L..(2021).The genesis, development, and evolution of original vertical joints in loess.Earth Science Reviews,214.
MLA	Feng L.,et al."The genesis, development, and evolution of original vertical joints in loess".Earth Science Reviews 214(2021).