Articles | Volume 13, issue 2
https://doi.org/10.5194/os-13-209-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/os-13-209-2017
© Author(s) 2017. This work is distributed under
the Creative Commons Attribution 3.0 License.
the Creative Commons Attribution 3.0 License.
Research article
| 
27 Mar 2017
Research article |
| 27 Mar 2017
Inorganic and organic geochemical fingerprinting of sediment sources and ocean circulation on a complex continental margin (São Paulo Bight, Brazil)
Michel Michaelovitch de Mahiques
CORRESPONDING AUTHOR
Instituto Oceanográfico, Universidade de São Paulo,
05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil
Till Jens Jörg Hanebuth
School of Coastal and Marine Systems Sciences, Coastal Carolina
University, 290 Allied Drive, Conway, SC 29526, USA
Renata Hanae Nagai
Centro de
Estudos do Mar, Universidade Federal do Paraná, 83255-976 Av. Beira-mar,
s/n, Pontal do Paraná, Brazil
Marcia Caruso Bícego
Instituto Oceanográfico, Universidade de São Paulo,
05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil
Rubens Cesar Lopes Figueira
Instituto Oceanográfico, Universidade de São Paulo,
05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil
Silvia Helena Mello Sousa
Instituto Oceanográfico, Universidade de São Paulo,
05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil
Leticia Burone
Facultad de Ciencias,
Universidad de La Republica, Iguá, 4225, Montevideo, 11400, Uruguay
Paula Franco-Fraguas
Facultad de Ciencias,
Universidad de La Republica, Iguá, 4225, Montevideo, 11400, Uruguay
Satie Taniguchi
Instituto Oceanográfico, Universidade de São Paulo,
05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil
Alexandre Barbosa Salaroli
Instituto Oceanográfico, Universidade de São Paulo,
05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil
Gilberto Pereira Dias
Instituto Oceanográfico, Universidade de São Paulo,
05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil
Denise Menezes Prates
Instituto Oceanográfico, Universidade de São Paulo,
05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil
Maria Eugenia Fernandes Freitas
Instituto Oceanográfico, Universidade de São Paulo,
05508-120 Praça do Oceanográfico, 191 São Paulo, SP, Brazil
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In this work we used a concept called geochemical fingerprinting, with isotopes of neodymium and lead as tools to recognize the main sources and the physical processes responsible for the transport and deposition of sediments on a large area of the South Atlantic margin. Distinct sources, such as Antarctica, the Andean Cordillera, the Río de la Plata basin, and old rocks from the Brazilian shield, are identified.
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In this work we used a concept called geochemical fingerprinting, with isotopes of neodymium and lead as tools to recognize the main sources and the physical processes responsible for the transport and deposition of sediments on a large area of the South Atlantic margin. Distinct sources, such as Antarctica, the Andean Cordillera, the Río de la Plata basin, and old rocks from the Brazilian shield, are identified.
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Short summary
In this paper we used sediment samples from the shelf and upper/middle slope off south-eastern Brazil in order to recognise the inorganic and organic signatures of the main current systems acting in the area. It was possible to identify the extension of the contribution of terrigenous sediments from the adjacent continent as well as to recognise the different geochemical signatures related to the Brazil Current, Intermediate Western Boundary Current and Deep Western Boundary Current.
In this paper we used sediment samples from the shelf and upper/middle slope off south-eastern...
