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Rare earth element patterns in lake sediments as studied by neutron activation analysis

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Abstract

Using instrumental neutron activation analysis, the vertical distribution of La, Ce, Nd, Sm, Eu, Tb, Yb and Lu was determined in 3 well dated sedimentary cores collected from Laguna Mar Chiquita, Argentina. Validation of the methodology was done using the Soil 7 (IAEA) reference material. The REE contents vary according to core location and lithological units, depending on the proportion of fluvial terrigenous components in the lake sediments. Lithologies with higher proportion of terrigenous components show higher REE concentrations, suggesting that the dominant REE carrier phase might be a detrital mineral. There is a consistent value of about 1.2 for (La/Yb)N and (LREE/HREE)N ratios for all sediments at the three sites, indicating a slight LREE enrichment in relation to the average shale NASC. Ce/Ce* values are close to 1.0, meaning that Ce behaves similarly to other light REE's.

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Authors and Affiliations

  1. Instituto de Geociências, Universidade de São Paulo São Paulo, Brazil

    S. M. B. Oliveira

  2. Laboratório de Análise por Ativação Neutrônica - IPEN, Av. Prof. Lineu Prestes 2242, CEP: 05508-900, São Paulo, Brazil

    F. E. Larizzatti & D. I. T. Fávaro

  3. Departamento de Radioproteção Ambiental - IPEN, São Paulo, Brazil

    S. R. D. Moreira & B. P. Mazzilli

  4. Centro de Investigaciones Geoquímicas y de Procesos de Superficie, Universidad Nacional de Córdoba, Sarsfield 299, 5000, Córdoba, Argentina

    E. L. Piovano

Authors
  1. S. M. B. Oliveira
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  2. F. E. Larizzatti
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  3. D. I. T. Fávaro
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  4. S. R. D. Moreira
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  5. B. P. Mazzilli
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  6. E. L. Piovano
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Oliveira, S.M.B., Larizzatti, F.E., Fávaro, D.I.T. et al. Rare earth element patterns in lake sediments as studied by neutron activation analysis. Journal of Radioanalytical and Nuclear Chemistry 258, 531–535 (2003). https://doi.org/10.1023/B:JRNC.0000011747.05704.63

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  • DOI: https://doi.org/10.1023/B:JRNC.0000011747.05704.63

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