The application of U-isotopes to assess weathering in contrasted soil-water regime in Brazil
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , |
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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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 |