Barium isotopic fractionation in latosol developed from strongly weathered basalt

doi:10.1016/j.scitotenv.2019.05.427

CORC > 地球环境研究所 > 中国科学院地球环境研究所 > 黄土与第四纪地质国家重点实验室（2010~）

	Barium isotopic fractionation in latosol developed from strongly weathered basalt
	Gong, Yingzeng 4; Zeng, Zhen 4; Zhou, Chen 4; Nan, Xiaoyun 4; Yu, Huimin 4; Lu, Ying 1; Li, Wangye 4; Gou, Wenxian 3; Cheng, Wenhan 2,4; Huang, Fang 4
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2019-10-15
卷号	687 页码:1295-1304
关键词	Barium isotopes Basalt weathering Latosol
ISSN号	0048-9697
DOI	10.1016/j.scitotenv.2019.05.427
通讯作者	Huang, Fang(fhuang@ustc.edu.cn)
英文摘要	Weathering is a key process in the transfer of material from continents to the hydrosphere. A latosol profile in Zhanjiang, Guangdong Province, South China, formed through intense weathering of basalt, was studied to improve understanding of Ba isotopic fractionation during basalt weathering. Profile horizons were grouped into Ba-depleted and Ba-enriched layers (D- and E-layers, respectively) according to the mass fraction of Ba lost or gained from the weathered profile relative to bedrock. delta Ba-137/134 values in the soil profile ranged from -0.22% to +0.02%, lower than those of the parent basaltic rock (0.03% +/- 0.03%). In the D-layers, Ba isotopic fractionation can be explained by Rayleigh fractionation, implying that heavy Ba isotopes are preferentially leached. The Rayleigh fractionation model is not applicable to the E-layers because they preferentially acquired isotopically light Ba isotopes during weathering. Results indicate a net loss of heavy Ba isotopes during strong weathering of basalt due to the precipitation of Fe-Mn (oxyhydr) oxides and adsorption on secondary minerals. A mass-balance model indicates that the average delta Ba-137/134 value of materials leached from the weathered profile is similar to 0.08%, slightly higher than that of the bedrock. This suggests a loss of heavy Ba isotopes into the hydrosphere during weathering of basalt, consistent with the enrichment of heavy Ba isotopes in river waters. (C) 2019 Elsevier B.V. All rights reserved.
资助项目	National Natural Science Foundation of China[41571130052] ; National Natural Science Foundation of China[41630206] ; State Key Laboratory of Loess and Quaternary Geology[SKLLQG1730]
WOS关键词	HAINAN ISLAND ; STABLE-ISOTOPES ; BA ; PRECIPITATION ; CYCLE ; GEOCHEMISTRY ; MOBILIZATION ; WITHERITE ; ARAGONITE ; STRONTIUM
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000480316300124
资助机构	National Natural Science Foundation of China ; State Key Laboratory of Loess and Quaternary Geology
内容类型	期刊论文
源URL	[http://ir.ieecas.cn/handle/361006/13613]
专题	地球环境研究所_黄土与第四纪地质国家重点实验室（2010~）
通讯作者	Huang, Fang
作者单位	1.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Guangdong, Peoples R China 2.Chinese Acad Sci, Inst Earth Environm, Slate Key Lab Loess & Quaternary Geol, Xian 710075, Shaanxi, Peoples R China 3.Nanjing Univ, Sch Earth Sci & Engn, Minist Educ, Key Lab Surficial Geochem, Nanjing 210023, Jiangsu, Peoples R China 4.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Anhui, Peoples R China
推荐引用方式 GB/T 7714	Gong, Yingzeng,Zeng, Zhen,Zhou, Chen,et al. Barium isotopic fractionation in latosol developed from strongly weathered basalt[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,687:1295-1304.
APA	Gong, Yingzeng.,Zeng, Zhen.,Zhou, Chen.,Nan, Xiaoyun.,Yu, Huimin.,...&Huang, Fang.(2019).Barium isotopic fractionation in latosol developed from strongly weathered basalt.SCIENCE OF THE TOTAL ENVIRONMENT,687,1295-1304.
MLA	Gong, Yingzeng,et al."Barium isotopic fractionation in latosol developed from strongly weathered basalt".SCIENCE OF THE TOTAL ENVIRONMENT 687(2019):1295-1304.