干旱区生态环境知识资源中心(Arid): Applicability of chemical weathering indices of eolian sands from the deserts in northern China

Arid

DOI	10.1016/j.catena.2020.105032
	Applicability of chemical weathering indices of eolian sands from the deserts in northern China
	Chen, Qiujie; Li, Zhuolun; Dong, Shipei; Yu, Qiangjing; Zhang, Cheng; Yu, Xinhui
通讯作者	Li, ZL (corresponding author), Lanzhou Univ, Coll Earth & Environm Sci, Ctr Glacier & Desert Res, Lanzhou, Peoples R China.
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2021
卷号	198
英文摘要	Chemical weathering is an important process that controls the evolution of the Earth's surface. By accurately and reliably estimating the intensity of chemical weathering, we can improve our understanding of the processes occurring at the Earth's surface as well as environmental changes. However, chemical weathering indices, which are influenced by source rocks and grain size, may not always accurately reflect the intensity of chemical weathering. Therefore, the use of chemical weathering indices to reliably reflect the changes in the intensity of chemical weathering in deserts remains uncertain. In this study, several chemical weathering indices, including the chemical index of alteration, Parker's weathering index, chemical index of weathering, plagioclase index of alteration, chemical proxy of alteration, Rb/Sr, and alpha E-Al indices, were calculated for 521 eolian sand samples collected from across twelve deserts in northern China. The results show that, for all the chemical weathering indices, eolian sands from the different deserts differed significantly. Rather than the climatic conditions in the studied deserts. factors such as source rocks and grain size had a larger impact on these indices. These indices cannot generally be used to reflect the intensity of chemical weathering. However, results showed that when the mean annual precipitation varies greatly between deserts, the changes in the WIP values of the fine fraction samples (<125 mu m) could be used to reflect the intensity of chemical weathering. This study enables accurate and reliable estimations of the intensity of chemical weathering and its variations in arid and semi-arid areas.
英文关键词	Chemical weathering Desert Eolian sand Geochemistry Climate Earth surface process
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000605337000008
WOS关键词	BADAIN JARAN DESERT ; MU US DESERT ; AEOLIAN DEPOSITS ; GEOCHEMICAL CHARACTERISTICS ; GEOMORPHOLOGICAL EVIDENCE ; ISOTOPIC CHARACTERISTICS ; INNER-MONGOLIA ; MAJOR ELEMENTS ; YELLOW-RIVER ; GRAIN-SIZE
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/347782
作者单位	[Chen, Qiujie; Li, Zhuolun; Dong, Shipei; Yu, Qiangjing; Zhang, Cheng; Yu, Xinhui] Lanzhou Univ, Coll Earth & Environm Sci, Ctr Glacier & Desert Res, Lanzhou, Peoples R China
推荐引用方式 GB/T 7714	Chen, Qiujie,Li, Zhuolun,Dong, Shipei,et al. Applicability of chemical weathering indices of eolian sands from the deserts in northern China[J]. 兰州大学,2021,198.
APA	Chen, Qiujie,Li, Zhuolun,Dong, Shipei,Yu, Qiangjing,Zhang, Cheng,&Yu, Xinhui.(2021).Applicability of chemical weathering indices of eolian sands from the deserts in northern China.CATENA,198.
MLA	Chen, Qiujie,et al."Applicability of chemical weathering indices of eolian sands from the deserts in northern China".CATENA 198(2021).