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(Reference retrieved automatically from SciELO through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Sedimentary changes on the Southeastern Brazilian upper slope during the last 35,000 years

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Author(s):
Michel M. Mahiques [1] ; Marina M. Fukumoto [2] ; Ilson C.A. Silveira [3] ; Rubens C.L. Figueira [4] ; Marcia C. Bícego [5] ; Rafael A. Lourenço [6] ; Silvia H. Mello-e-Sousa [7]
Total Authors: 7
Affiliation:
[1] Universidade de São Paulo. Instituto Oceanográfico. Departamento de Oceanografia Física, Química e Geológica - Brasil
[2] Universidade de São Paulo. Instituto Oceanográfico. Programa de Pós-graduação em Oceanografia Química e Geológica - Brasil
[3] Universidade de São Paulo. Instituto Oceanográfico. Departamento de Oceanografia Física, Química e Geológica - Brasil
[4] Universidade Cruzeiro do Sul - Brasil
[5] Universidade de São Paulo. Instituto Oceanográfico. Departamento de Oceanografia Física, Química e Geológica - Brasil
[6] Universidade de São Paulo. Instituto Oceanográfico. Programa de Pós-graduação em Oceanografia Química e Geológica - Brasil
[7] Universidade de São Paulo. Instituto Oceanográfico. Departamento de Oceanografia Física, Química e Geológica - Brasil
Total Affiliations: 7
Document type: Journal article
Source: Anais da Academia Brasileira de Ciências; v. 79, n. 1, p. 171-181, 2007-03-00.
Abstract

A first evaluation of the sedimentary changes, including accumulation of inorganic and organic carbon on the upper slope off Southeastern Brazil under different climatic conditions, based on the analysis of a sedimentary core, is here presented. Results indicate that sedimentation rate as well sedimentary characteristics, including the nature of the organic carbon deposited during the LGM (Last Glacial Maximum), were different from the present deposition, indicating higher primary productivity during the LGM, to be accounted for by the higher values of marine organic carbon. Nevertheless, the higher values of Accumulation Rate of calcium carbonate and organic carbon can be credited to the higher values of the sedimentation rates. Conditions prevailing during Isotope Stage 3 may be considered intermediate as between the LGM and the present day. The conditions for a higher primary productivity associated with the deposition of finer terrigenous sediments may be explained as a response to the off shoreward displacement of the main flow of the Brazil Current. (AU)

FAPESP's process: 03/10740-0 - Holocene variations in the Southern Brazilian Continental Shelf paleoproductivity
Grantee:Michel Michaelovitch de Mahiques
Support Opportunities: Regular Research Grants