Brasil | Artículos de revistas

U-ages in soils and groundwater evidencing wet periods 400-600 kyr ago in southeast Brazil

dc.contributorUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2014-05-20T14:17:12Z
dc.date.available2014-05-20T14:17:12Z
dc.date.created2014-05-20T14:17:12Z
dc.date.issued2007-07-01
dc.identifierApplied Radiation and Isotopes. Oxford: Pergamon-Elsevier B.V., v. 65, n. 7, p. 776-783, 2007.
dc.identifier0969-8043
dc.identifierhttp://hdl.handle.net/11449/25161
dc.identifier10.1016/j.apradiso.2007.03.001
dc.identifierWOS:000247304300004
dc.identifier7430102726026121
dc.description.abstractU-238 and its radiogenic daughter U-234 have been utilized for dating soil formation and groundwater residence time during the last 1.5 million years, in this case based on the U-clissolution/precipitation occurring during modifications of the oxidation-reduction conditions. In this paper, we report a 400-600 kyr proxy of wet periods from sediments occurring in a soil profile developed over rocks outcropping at the Parana sedimentary basin in Brazil, and from groundwater exploited of Guarani aquifer at the same basin. The approaches indicated successful use of the U-modeled ages for suggesting wet periods exceeding the past 116-210 kyr from previous studies. (C) 2007 Elsevier Ltd. All rights reserved.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationApplied Radiation and Isotopes
dc.relation1.123
dc.relation0,528
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjecturanium isotopes
dc.subjectgroundwater
dc.subjectGuarani aquifer
dc.subjectsoils
dc.subjectParana sedimentary basin
dc.titleU-ages in soils and groundwater evidencing wet periods 400-600 kyr ago in southeast Brazil
dc.typeArtículos de revistas


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