dc.creator | Bonotto, Daniel Marcos | es |
dc.creator | García-Tenorio García-Balmaseda, Rafael | es |
dc.date.accessioned | 2023-05-17T17:29:44Z | |
dc.date.available | 2023-05-17T17:29:44Z | |
dc.date.issued | 2014 | |
dc.identifier.citation | Bonotto, D.M. y García-Tenorio García-Balmaseda, R. (2014). A comparative evaluation of the CF:CS and CRS models in 210Pb chronological studies applied to hydrographic basins in Brazil. Applied Radiation and Isotopes, 92, 58-72. https://doi.org/10.1016/j.apradiso.2014.06.012. | |
dc.identifier.issn | 1872-9800 | es |
dc.identifier.issn | 0969-8043 | es |
dc.identifier.uri | https://hdl.handle.net/11441/146260 | |
dc.description.abstract | The Constant Flux: Constant Sedimentation (CF:CS) and Constant Rate of Supply (CRS) of unsupported⧸
excess 210Pb models have been applied to a 210Pb data set providing of eighteen sediments profiles
sampled at four riverine systems occurring in Brazil, South America: Corumbataí River basin (S1¼Site 1,
São Paulo State), Atibaia River basin (S2¼Site 2, São Paulo State), Ribeirão dos Bagres basin (S3¼Site 3,
São Paulo State) and Amazon River mouth (S4¼Site 4, Amapá State). These sites were chosen for a
comparative evaluation of the performance of the CF:CS and CRS models due to their pronounced
differences on the geographical location, geological context, soil composition, biodiversity, climate, rainfall,
and water flow regime, among other variable aspects. However, all sediments cores exhibited a common
denominator consisting on a database built from the use of the same techniques for acquiring the
sediments major chemical composition (SiO2, Al2O3, Na2O, K2O, CaO, MgO, Fe2O3, MnO, P2O5, TiO2 and
LOI-Loss on Ignition) and unsupported⧸excess 210Pb activity data. In terms of sedimentation rates, the
performance of the CRS model was better than that of the CF:CS model as it yielded values more compatible
with those expected from field evidences. Under the chronological point of view, the CRS model always
provided ages within the permitted range of the 210Pb-method in the studied sites, whereas the CF:CS
model predicted some values above 150 years. The SiO2 content decreased in accordance with the LOI
increase in all cores analyzed and such inverse relationship was also tracked in the SiO2–LOI curves of
historical trends. The SiO2–LOI concentration fluctuations in sites S1 and S3 also coincided with some
Cu and Cr inputs in the drainage systems. | es |
dc.format | application/pdf | es |
dc.format.extent | 15 p. | es |
dc.language.iso | eng | es |
dc.publisher | Elsevier | es |
dc.relation.ispartof | Applied Radiation and Isotopes, 92, 58-72. | |
dc.rights | Attribution-NonCommercial-NoDerivatives 4.0 Internacional | * |
dc.rights.uri | http://creativecommons.org/licenses/by-nc-nd/4.0/ | * |
dc.subject | 210Pb-method | es |
dc.subject | CF:CS model | es |
dc.subject | CRS model | es |
dc.subject | Sedimentation rate | es |
dc.subject | SiO2–LOI trends | es |
dc.title | A comparative evaluation of the CF:CS and CRS models in 210Pb chronological studies applied to hydrographic basins in Brazil | es |
dc.type | info:eu-repo/semantics/article | es |
dcterms.identifier | https://ror.org/03yxnpp24 | |
dc.type.version | info:eu-repo/semantics/publishedVersion | es |
dc.rights.accessRights | info:eu-repo/semantics/openAccess | es |
dc.contributor.affiliation | Universidad de Sevilla. Departamento de Física Aplicada II | es |
dc.relation.publisherversion | https://doi.org/10.1016/j.apradiso.2014.06.012 | es |
dc.identifier.doi | 10.1016/j.apradiso.2014.06.012 | es |
dc.journaltitle | Applied Radiation and Isotopes | es |
dc.publication.issue | 92 | es |
dc.publication.initialPage | 58 | es |
dc.publication.endPage | 72 | es |