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Development and evolution of Loess vertical joints on the Chinese Loess Plateau at different spatiotemporal scales

文献类型：期刊论文

作者Feng, Li1,2,3,4; Lin, Henry2; Zhang, Maosheng1; Guo, Li2; Jin, Zhao3,6; Liu, Xinbo5
刊名ENGINEERING GEOLOGY
出版日期2020-02-01
卷号265页码:15
关键词Loess vertical joints Structural units Cross-scale transformation Developmental mechanism
ISSN号0013-7952
DOI10.1016/j.enggeo.2019.105372
通讯作者Zhang, Maosheng(zmaosheng@mail.cgs.gov.cn) ; Jin, Zhao(jinzhao@ieecas.cn)
英文摘要The vertical joints of aeolian loess are ubiquitous on the Chinese Loess Plateau (CLP), the distribution variability of which mainly depends on the differences in structural characteristics of loess, water drivers (e.g., rainfall or irrigation), loess strata (e.g., sedimentary depth), and microtopography. This study conducted extensive field investigation and experiments to enhance the understanding of morphologies, cross-scale transformation mechanism, and structural bases of loess vertical joints (LVJs). Moreover, the development and evolution processes of LVJs were refined by considering loess sedimentary dynamics. Results show that: (1) LVJs are the product of diagenesis in loess strata during loess historical sedimentary process; (2) the pore concentration zones and vertical tubular channels in loess are the structural bases of forming original vertical joints (OVJs) at the micro-mesoscale, which is supported by the results from the three-dimensional computing tomography (CT) scanning and scanning electron microscopy (SEM) tests; and (3) the morphologies of LVJs vary with the microtopography at different spatiotemporal scales, and is characterized by the cross-scale transformation mechanism, i.e., that they could transform up (i.e., an expansion behavior) or down (i.e., a degradation behavior) at the micro-, meso-, and sub-macro scales under the influences of dry-wet cycles, loess pile thickening, and exogenic forces. Besides, we also propose the development and evolution mechanism of OVJs in loess from the viewpoint of unsaturated loess, which would help understand the loess anisotropic genesis, structural evolution, preferential flow, and the occurrence of geohazards such as landslides and soil erosion.
WOS关键词PARTICLE PACKING ; SOIL ; LANDSLIDES ; BEHAVIOR ; HEIFANGTAI ; MECHANISM ; SLOPE ; AREA ; FLOW ; MICROPOROSITY
资助项目National Key R&D Program of China[2018YFC1504701] ; National Natural Science Foundation of China[41790444] ; National Natural Science Foundation of China[41530640]
WOS研究方向Engineering ; Geology
语种英语
WOS记录号WOS:000517660100003
出版者ELSEVIER
资助机构National Key R&D Program of China ; National Natural Science Foundation of China
源URL[http://ir.ieecas.cn/handle/361006/12736]  
专题地球环境研究所_生态环境研究室
通讯作者Zhang, Maosheng; Jin, Zhao
作者单位1.Xian Ctr China Geol Survey, Key Lab Geohazard Loess Area, Minist Nat Resources, Xian 710054, Peoples R China
2.Penn State Univ, Dept Ecosyst Sci & Management, University Pk, PA 16802 USA
3.Chinese Acad Sci, Inst Earth Environm, State Key Lab Loess & Quaternary Geol, Xian 710061, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
5.Beijing Normal Univ, Fac Geog Sci, Beijing 100875, Peoples R China
6.CAS Ctr Excellence Quaternary Sci & Global Change, Xian 710061, Peoples R China
推荐引用方式
GB/T 7714		 Feng, Li,Lin, Henry,Zhang, Maosheng,et al. Development and evolution of Loess vertical joints on the Chinese Loess Plateau at different spatiotemporal scales[J]. ENGINEERING GEOLOGY,2020,265:15.
APA Feng, Li,Lin, Henry,Zhang, Maosheng,Guo, Li,Jin, Zhao,&Liu, Xinbo.(2020).Development and evolution of Loess vertical joints on the Chinese Loess Plateau at different spatiotemporal scales.ENGINEERING GEOLOGY,265,15.
MLA Feng, Li,et al."Development and evolution of Loess vertical joints on the Chinese Loess Plateau at different spatiotemporal scales".ENGINEERING GEOLOGY 265(2020):15.

入库方式： OAI收割

来源：地球环境研究所

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