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(Referência obtida automaticamente do Web of Science, por meio da informação sobre o financiamento pela FAPESP e o número do processo correspondente, incluída na publicação pelos autores.)

Determination of controls on Holocene barrier progradation through application of OSL dating: The Ilha Comprida Barrier example, Southeastern Brazil

Texto completo
Autor(es):
Guedes, C. C. F. [1] ; Giannini, P. C. F. [1] ; Sawakuchi, A. O. [1] ; DeWitt, R. [2] ; Nascimento, Jr., D. R. [1] ; Aguiar, V. A. P. [1] ; Rossi, M. G. [1]
Número total de Autores: 7
Afiliação do(s) autor(es):
[1] Univ Sao Paulo, Dept Geol Sedimentar & Ambiental, Inst Geociencias, BR-05508080 Sao Paulo - Brazil
[2] Oklahoma State Univ, Radiat Dosimetry Lab, Dept Phys, Stillwater, OK 74074 - USA
Número total de Afiliações: 2
Tipo de documento: Artigo Científico
Fonte: MARINE GEOLOGY; v. 285, n. 1-4, p. 1-16, JUL 1 2011.
Citações Web of Science: 26
Resumo

Barrier development during the Holocene is studied using the example of the Ilha Comprida, Southeastern Brazil. Aerial photos, facies analysis, and optically stimulated luminescence dating are used to define the barrier emergence and evolution. Optically stimulated luminescence ages and facies successions indicate that the Ilha Comprida probably began as a Holocene transgressive barrier island 6000 years ago, just before the last relative sea-level maximum. Since then the barrier has progradated through the addition of curved beach ridges. Based on beach ridge alignments, six units of growth are identified with two growth directions, transverse and longitudinal. Rates of progradation with transverse growth vary from 0.13 to 4.6 m/year. Rates of longitudinal growth to NE range from 5.2 to 30 m/year. Variation in coastal progradation rates and sediment retention during the last 6000 years is compared with climate, physiography and relative sea-level changes. The physiography, represented by pre-Cenozoic hills, is the major control on sediment retention and alternation between longitudinal and transverse growth. Climate variations, such as the Little Ice Age event, apparently control the formation of ridges types: beach ridges, foredunes, and blowouts. These results allow the use of the Ilha Comprida Barrier as an example to analyze the major controls on barriers progradation. (C) 2011 Elsevier B.V. All rights reserved. (AU)

Processo FAPESP: 07/51511-4 - Evolução sedimentar quaternária da Ilha Comprida, Estado de São Paulo
Beneficiário:Carlos Conforti Ferreira Guedes
Linha de fomento: Bolsas no Brasil - Mestrado
Processo FAPESP: 01/01732-8 - Dinâmica de sistemas deposicionais eólicos: um estudo comparativo entre o recente e o antigo
Beneficiário:Paulo César Fonseca Giannini
Linha de fomento: Auxílio à Pesquisa - Regular
Processo FAPESP: 02/01016-3 - Os cordões litorâneos e as dunas eólicas da Ilha Comprida, estado de São Paulo
Beneficiário:Carlos Conforti Ferreira Guedes
Linha de fomento: Bolsas no Brasil - Iniciação Científica