Barium isotopic fractionation in latosol developed from strongly weathered basalt

doi:10.1016/j.scitotenv.2019.05.427

IEECAS OpenIR > 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 1; Zeng, Zhen 1; Zhou, Chen 1; Nan, Xiaoyun 1; Yu, Huimin 1; Lu, Ying 2; Li, Wangye 1; Gou, Wenxian 3; Cheng, Wenhan 1,4; Huang, Fang 1
通讯作者	Huang, Fang(fhuang@ustc.edu.cn)
	2019-10-15
发表期刊	SCIENCE OF THE TOTAL ENVIRONMENT
ISSN	0048-9697
卷号	687 页码:1295-1304
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.
关键词	Barium isotopes Basalt weathering Latosol
DOI	10.1016/j.scitotenv.2019.05.427
关键词[WOS]	HAINAN ISLAND ; STABLE-ISOTOPES ; BA ; PRECIPITATION ; CYCLE ; GEOCHEMISTRY ; MOBILIZATION ; WITHERITE ; ARAGONITE ; STRONTIUM
收录类别	SCI ; SCI
语种	英语
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研究方向	Environmental Sciences & Ecology
项目资助者	National Natural Science Foundation of China ; State Key Laboratory of Loess and Quaternary Geology
WOS类目	Environmental Sciences
WOS记录号	WOS:000480316300124
出版者	ELSEVIER
引用统计	被引频次：45[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ieecas.cn/handle/361006/13614
专题	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.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Crust Mantle Mat & Environm, Hefei 230026, Anhui, Peoples R China 2.South China Agr Univ, Coll Nat Resources & Environm, Guangzhou 510642, Guangdong, Peoples R China 3.Nanjing Univ, Sch Earth Sci & Engn, Minist Educ, Key Lab Surficial Geochem, Nanjing 210023, Jiangsu, Peoples R China 4.Chinese Acad Sci, Inst Earth Environm, Slate Key Lab Loess & Quaternary Geol, Xian 710075, Shaanxi, 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.