Nd and Pb isotope signatures on the Southeastern South American upper margin: Implications for sediment transport and source rocks

Mahiques, Michel Michaelovitch de; Tassinari, Colombo Celso Gaeta; Marcolini, Susana; Violante, Roberto A.; Figueira, Rubens César Lopes; Silveira, Ilson Carlos Almeida da; Burone, Letícia; Sousa, Silvia Helena de Mello e

doi:10.1016/j.margeo.2007.11.007

Cited by 83 publications

(90 citation statements)

References 43 publications

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“…In fact, this break marks the limit of influence of the sediments originating from the Río de La Plata as stated by Campos et al (2008) and Mahiques et al (2008).…”

Section: Sedimentary Processesmentioning

confidence: 81%

“…On the inner shelf, the sedimentation is mainly determined by the displacement of the Brazilian Coastal Current (Souza and Robinson 2004), which carries sediments from the Río de La Plata and, to a lesser extent, from the southern Brazilian coastal lagoons , Möller Jr. et al 2008, Mahiques et al 2008. On the middle and outer shelves, as well as on the upper slope, the sedimentary processes are mainly influenced by the southward flow of the Brazil Current (BC) along the western Atlantic continental margin (Mahiques et al 2002(Mahiques et al , 2004.…”

Section: Study Areamentioning

confidence: 99%

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Radiocarbon geochronology of the sediments of the São Paulo Bight (southern Brazilian upper margin)

Mahiques

Sousa

Burone

et al. 2011

An. Acad. Bras. Ciênc.

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The aim of this work was to generate an inventory of the data on radiocarbon datings obtained from sediments of the São Paulo Bight (southern Brazilian upper margin) and to analyze the data in terms of Late Quaternary sedimentary processes and sedimentation rates. A total of 238 radiocarbon datings from materials collected using different sampling procedures was considered for this work. The sedimentation rates varied from less than 2 to 68 cm.kyr -1 . The highest sedimentation rate values were found in a low-energy (ría type) coastal system as well as in the upwelling zones of Santa Catarina and Cabo Frio. The lowest rates were found on the outer shelf and upper slopes. Our results confirm the strong dependency of the shelf currents, with an emphasis to the terrigenous input from the Río de La Plata outflow which is transported via the Brazilian Coastal Current, as well as of the coupled Brazil Current -Intermediate Western Boundary Current (BC-IWBC) dynamics on the sedimentary processes. At least three indicators of the paleo sea level were found at 12200 yr BP (conventional radiocarbon age) (103 meters below sea level -mbsl), 8300-8800 cal yr BP (13 mbsl) and 7700-8100 cal yr BP (6 mbsl).

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“…In fact, this break marks the limit of influence of the sediments originating from the Río de La Plata as stated by Campos et al (2008) and Mahiques et al (2008).…”

Section: Sedimentary Processesmentioning

confidence: 81%

Section: Study Areamentioning

confidence: 99%

Radiocarbon geochronology of the sediments of the São Paulo Bight (southern Brazilian upper margin)

Mahiques

Sousa

Burone

et al. 2011

An. Acad. Bras. Ciênc.

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“…The penetration of the BCC onto the SE Brazilian continental shelf presently reaches latitudes of about 28°S (Piola et al, 2000), and wind stress is considered to be the main factor controlling its northward penetration (Möller et al, 2008;Piola et al, 2008). Before the full development of the RdlP plume, the SE Brazilian shelf could have received sediments from the Argentinean shelf (Mahiques et al, 2008;Gyllencreutz et al, 2010), but the causes and timing of this change in sediment sourcing are still poorly constrained.…”

Section: Introductionmentioning

confidence: 99%

Magnetic fingerprint of the late Holocene inception of the Río de la Plata plume onto the southeast Brazilian shelf

Mathias¹,

Nagai²,

Trindade³

et al. 2014

Palaeogeography, Palaeoclimatology, Palaeoecology

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“…(Campos et al, 2008;Mahiques et al, 2008Mahiques et al, , 2011 (Miranda, 1982;Castro & Miranda, 1998; Braga características termohalinas que assumem na plataforma:…”

Section: 3área De Estudounclassified

“…Porém, Castro (1996) (Campos et al, 1999;Souza & Robinson, 2004). A presença desse fluxo atua nos processos de sedimentação naárea de estudo, transportando sedimento do Río de La Plata para a plataforma continental de São Paulo (Mahiques et al, 2008;Gyllencreutz et al, 2010;Mahiques et al, 2011). …”

Section: 3área De Estudounclassified

Integridade biótica dos ecossistemas na região do Arquipélago dos Alcatrazes, São Sebastião - SP

Hoff¹

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Nd and Pb isotope signatures on the Southeastern South American upper margin: Implications for sediment transport and source rocks

Cited by 83 publications

References 43 publications

Radiocarbon geochronology of the sediments of the São Paulo Bight (southern Brazilian upper margin)

Radiocarbon geochronology of the sediments of the São Paulo Bight (southern Brazilian upper margin)

Magnetic fingerprint of the late Holocene inception of the Río de la Plata plume onto the southeast Brazilian shelf

Integridade biótica dos ecossistemas na região do Arquipélago dos Alcatrazes, São Sebastião - SP

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