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, Yingzeng1; Zeng, Zhen1; Zhou, Chen1; Nan, Xiaoyun1; Yu, Huimin1; Lu, Ying2; Li, Wangye1; Gou, Wenxian3; Cheng, Wenhan1,4; Huang, Fang1
Corresponding AuthorHuang, Fang(
AbstractWeathering 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.
KeywordBarium isotopes Basalt weathering Latosol
Indexed BySCI ; SCI
Funding ProjectNational Natural Science Foundation of China[41571130052] ; National Natural Science Foundation of China[41630206] ; State Key Laboratory of Loess and Quaternary Geology[SKLLQG1730]
WOS Research AreaEnvironmental Sciences & Ecology
Funding OrganizationNational Natural Science Foundation of China ; State Key Laboratory of Loess and Quaternary Geology
WOS SubjectEnvironmental Sciences
WOS IDWOS:000480316300124
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Cited Times:18[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorHuang, Fang
Affiliation1.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
Recommended Citation
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.
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