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Chemical weathering indices and how they relate to the mechanical parameters of granite regolith from southern China

文献类型：期刊论文

作者Liu, Xinyu1,3,5; Zhang, Xianwei5; Kong, Lingwei5; Wang, Gang1,5; Liu, Honghu2,4
刊名CATENA
出版日期2022-09-01
卷号216页码:14
关键词Chemical weathering indices Soil erosion Granite regolith Mechanical properties Gully erosion Quantitative relationship
ISSN号0341-8162
DOI10.1016/j.catena.2022.106400
通讯作者Zhang, Xianwei(xwzhang@whrsm.ac.cn)
英文摘要In most cases, chemical weathering reduces the strength and stability of granite regolith and increases its water sensitivity. When combined with external agents such as climate, these alterations facilitate geomorphological evolution, such as gully erosion in hilly regions. The lack of fundamental understanding about how gully erosion forms have led to an increasing trend of gully erosion in recent years. Because the weathering-controlled properties of granite regolith have a significant effect on gully development, it is vital to assess the chemical weathering degree. However, despite extensive studies on quantifying weathering degree using chemical weathering indices, less is known about how these parameters are correlated with the mechanical properties of granite regolith. To this end, a typical weathering profile is established for granite in Jiangmen, China. This paper investigates the chemical weathering of granite, evaluates the appropriateness of previous chemical weathering indices, and correlates them with the mechanical parameters of granite regolith. Several suitable indices, including CIA, Bases/Al2O3, Bases/R2O3 , ba(1), ba(3), CIW, I-mob, and PIA, are selected and correlated with the mechanical parameters. These indices apply well, with some scattering when they are correlated with the internal frictional angle of granite residual soil. This paper provides a comprehensive datset regarding the physical, mineralogical, petrographical, geochemical, and mechanical properties of granite regolith, and enhances the understanding of chemical weathering, especially its correlations with the mechanical properties of regolith.
WOS关键词SOURCE-ROCK CONTROL ; RESIDUAL SOIL ; SEDIMENT GENERATION ; ENGINEERING GEOLOGY ; GRAIN-SIZE ; GEOCHEMISTRY ; CALABRIA ; EROSION ; SYSTEMS ; MASSIF
资助项目National Natural Science Foundation of China[41972285] ; National Natural Science Foundation of China[41672293] ; Youth Innovation Promotion Association CAS[2018363] ; Key R&D projects of Hubei Province[2021BAA186] ; Science Fund for Distinguished Young Scholars of Hubei Province[2020CFA103] ; CRSRI Open Research Program[CKWV2021884/KY] ; Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education of the People's Republic of China
WOS研究方向Geology ; Agriculture ; Water Resources
语种英语
WOS记录号WOS:000832992000004
出版者ELSEVIER
资助机构National Natural Science Foundation of China ; Youth Innovation Promotion Association CAS ; Key R&D projects of Hubei Province ; Science Fund for Distinguished Young Scholars of Hubei Province ; CRSRI Open Research Program ; Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education of the People's Republic of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/181702]  
专题中国科学院地理科学与资源研究所
通讯作者Zhang, Xianwei
作者单位1.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
3.Beijing Normal Univ, Key Lab Environm Change & Nat Disaster, Minist Educ, Beijing 100875, Peoples R China
4.Changjiang Water Resource Commiss, Changjiang River Sci Res Inst, Wuhan 430010, Peoples R China
5.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Xinyu,Zhang, Xianwei,Kong, Lingwei,et al. Chemical weathering indices and how they relate to the mechanical parameters of granite regolith from southern China[J]. CATENA,2022,216:14.
APA Liu, Xinyu,Zhang, Xianwei,Kong, Lingwei,Wang, Gang,&Liu, Honghu.(2022).Chemical weathering indices and how they relate to the mechanical parameters of granite regolith from southern China.CATENA,216,14.
MLA Liu, Xinyu,et al."Chemical weathering indices and how they relate to the mechanical parameters of granite regolith from southern China".CATENA 216(2022):14.

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来源：地理科学与资源研究所

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