The application of U-isotopes to assess weathering in contrasted soil-water regime in Brazil

Detalhes bibliográficos
Autor(a) principal: Rosolen, Vania [UNESP]
Data de Publicação: 2018
Outros Autores: Bueno, Guilherme Taitson, Bonotto, Daniel Marcos [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1016/j.apradiso.2017.11.034
http://hdl.handle.net/11449/175634
Resumo: This paper presents the use of U-series radionuclides 238U and 234U to evaluate the biogeochemical disequilibrium in soil cover under a contrasted soil-water regime. The approach was applied in three profiles located in distinct topographical positions, from upslope ferralitic to downslope hydromorphic domain. The U fractionation data was obtained in the samples representing the saprolite and the superficial and subsuperficial soil horizons. The results showed a significant and positive correlation between U and the Total Organic Carbon (TOC). Soil organic matter has accumulated in soil due to hydromorphy. There is no evidence of positive correlation between U and Fe, as expected in lateritic soils. The advance of the hydromorphy on Ferralsol changes the weathering rates, and the ages of weathering are discussed as a function of the advance of waterlogged soil conditions from downslope. Also, the bioturbation could represent the other factor responsible to construct a more recent soil horizon.
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spelling The application of U-isotopes to assess weathering in contrasted soil-water regime in BrazilDatingHydromorphyLateritic soilMarilia formationUranium isotopesThis paper presents the use of U-series radionuclides 238U and 234U to evaluate the biogeochemical disequilibrium in soil cover under a contrasted soil-water regime. The approach was applied in three profiles located in distinct topographical positions, from upslope ferralitic to downslope hydromorphic domain. The U fractionation data was obtained in the samples representing the saprolite and the superficial and subsuperficial soil horizons. The results showed a significant and positive correlation between U and the Total Organic Carbon (TOC). Soil organic matter has accumulated in soil due to hydromorphy. There is no evidence of positive correlation between U and Fe, as expected in lateritic soils. The advance of the hydromorphy on Ferralsol changes the weathering rates, and the ages of weathering are discussed as a function of the advance of waterlogged soil conditions from downslope. Also, the bioturbation could represent the other factor responsible to construct a more recent soil horizon.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Departamento de Petrologia e Metalogenia Universidade Estadual Paulista (UNESP), Câmpus de Rio Claro, Av. 24-A, No.1515, C.P. 178Instituto de Estudos Sócio-Ambientais Universidade Federal de Goiás (UFG), Campus IIDepartamento de Petrologia e Metalogenia Universidade Estadual Paulista (UNESP), Câmpus de Rio Claro, Av. 24-A, No.1515, C.P. 178FAPESP: 2017/14168-1CNPq: 465571/2014-0Universidade Estadual Paulista (Unesp)Universidade Federal de Goiás (UFG)Rosolen, Vania [UNESP]Bueno, Guilherme TaitsonBonotto, Daniel Marcos [UNESP]2018-12-11T17:16:49Z2018-12-11T17:16:49Z2018-02-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article157-163application/pdfhttp://dx.doi.org/10.1016/j.apradiso.2017.11.034Applied Radiation and Isotopes, v. 132, p. 157-163.1872-98000969-8043http://hdl.handle.net/11449/17563410.1016/j.apradiso.2017.11.0342-s2.0-850380191302-s2.0-85038019130.pdfScopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengApplied Radiation and Isotopes0,528info:eu-repo/semantics/openAccess2023-12-30T06:20:17Zoai:repositorio.unesp.br:11449/175634Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T21:42:22.670196Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv The application of U-isotopes to assess weathering in contrasted soil-water regime in Brazil
title The application of U-isotopes to assess weathering in contrasted soil-water regime in Brazil
spellingShingle The application of U-isotopes to assess weathering in contrasted soil-water regime in Brazil
Rosolen, Vania [UNESP]
Dating
Hydromorphy
Lateritic soil
Marilia formation
Uranium isotopes
title_short The application of U-isotopes to assess weathering in contrasted soil-water regime in Brazil
title_full The application of U-isotopes to assess weathering in contrasted soil-water regime in Brazil
title_fullStr The application of U-isotopes to assess weathering in contrasted soil-water regime in Brazil
title_full_unstemmed The application of U-isotopes to assess weathering in contrasted soil-water regime in Brazil
title_sort The application of U-isotopes to assess weathering in contrasted soil-water regime in Brazil
author Rosolen, Vania [UNESP]
author_facet Rosolen, Vania [UNESP]
Bueno, Guilherme Taitson
Bonotto, Daniel Marcos [UNESP]
author_role author
author2 Bueno, Guilherme Taitson
Bonotto, Daniel Marcos [UNESP]
author2_role author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Universidade Federal de Goiás (UFG)
dc.contributor.author.fl_str_mv Rosolen, Vania [UNESP]
Bueno, Guilherme Taitson
Bonotto, Daniel Marcos [UNESP]
dc.subject.por.fl_str_mv Dating
Hydromorphy
Lateritic soil
Marilia formation
Uranium isotopes
topic Dating
Hydromorphy
Lateritic soil
Marilia formation
Uranium isotopes
description This paper presents the use of U-series radionuclides 238U and 234U to evaluate the biogeochemical disequilibrium in soil cover under a contrasted soil-water regime. The approach was applied in three profiles located in distinct topographical positions, from upslope ferralitic to downslope hydromorphic domain. The U fractionation data was obtained in the samples representing the saprolite and the superficial and subsuperficial soil horizons. The results showed a significant and positive correlation between U and the Total Organic Carbon (TOC). Soil organic matter has accumulated in soil due to hydromorphy. There is no evidence of positive correlation between U and Fe, as expected in lateritic soils. The advance of the hydromorphy on Ferralsol changes the weathering rates, and the ages of weathering are discussed as a function of the advance of waterlogged soil conditions from downslope. Also, the bioturbation could represent the other factor responsible to construct a more recent soil horizon.
publishDate 2018
dc.date.none.fl_str_mv 2018-12-11T17:16:49Z
2018-12-11T17:16:49Z
2018-02-01
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1016/j.apradiso.2017.11.034
Applied Radiation and Isotopes, v. 132, p. 157-163.
1872-9800
0969-8043
http://hdl.handle.net/11449/175634
10.1016/j.apradiso.2017.11.034
2-s2.0-85038019130
2-s2.0-85038019130.pdf
url http://dx.doi.org/10.1016/j.apradiso.2017.11.034
http://hdl.handle.net/11449/175634
identifier_str_mv Applied Radiation and Isotopes, v. 132, p. 157-163.
1872-9800
0969-8043
10.1016/j.apradiso.2017.11.034
2-s2.0-85038019130
2-s2.0-85038019130.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Applied Radiation and Isotopes
0,528
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 157-163
application/pdf
dc.source.none.fl_str_mv Scopus
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
repository.mail.fl_str_mv
_version_ 1808129349133533184

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