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Architecture and stratigraphic framework of shelf sedimentary systems off Rio de Janeiro state, Northern Santos Basin-Brazil


 
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1. Title Title of document Architecture and stratigraphic framework of shelf sedimentary systems off Rio de Janeiro state, Northern Santos Basin-Brazil
 
2. Creator Author's name, affiliation, country Renata Moreira da Costa Maia; Universidade Federal Fluminense; Departamento de Geologia; LAGEMAR;
 
2. Creator Author's name, affiliation, country Antonio Tadeu dos Reis; Universidade do Estado do Rio de Janeiro; Faculdade de Oceanografia; Departamento de Oceanografia Geológica;
 
2. Creator Author's name, affiliation, country Eliane da Costa Alves; Universidade Federal Fluminense; Departamento de Geologia; LAGEMAR;
 
2. Creator Author's name, affiliation, country Cleverson Guizan Silva; Universidade Federal Fluminense; Departamento de Geologia; LAGEMAR;
 
2. Creator Author's name, affiliation, country Josefa Varela Guerra; Universidade do Estado do Rio de Janeiro; Faculdade de Oceanografia; Departamento de Oceanografia Geológica;
 
2. Creator Author's name, affiliation, country Christian Gorini; Université Pierre et Marie Curie-Paris; Institut des Sciences de la Terre Paris; France Lab;
 
2. Creator Author's name, affiliation, country Adalberto Silva; Universidade Federal Fluminense; Departamento de Geologia; LAGEMAR;
 
2. Creator Author's name, affiliation, country Rodrigo Arantes-Oliveira; Universidade do Estado do Rio de Janeiro; Faculdade de Oceanografia; Departamento de Oceanografia Geológica;
 
3. Subject Discipline(s)
 
3. Subject Keyword(s) Continental shelf;Forced regression;Quaternary;Pliocene;Glacioeustatic oscillations;Eastern Brazilian Margin
 
4. Description Abstract Seismic analysis of sparker lines of GEOMAR cruises allowed us to address a first stratigraphic scenario for the shallow sedimentary record (~300 msec) of the continental shelf off Rio de Janeiro State, northern Santos basin. Two sets of seismic sequences were identified and interpreted as a succession of depositional sequences induced by repeated glacioeustatic cycles. Depositional sequences composing Set I (SqA-SqC) are dominantly sigmoidal, reflecting periods of increasing accommodation space that favoured the preservation of both aggradational and progradational units; sequences of Set II (Sq1-Sq5) are essentially seaward-thickening stacks of forced-regression wedges, implying periods of declining accommodation space. Comparison between seismic lines and chronostratigraphic data allowed the mapped sequences to be placed within the Plio-Quaternary. Correlations also suggest that most of Set I (SqA and lower portion of SqB) was deposited during the Pliocene (undifferentiated Pliocene), while the upper portion of sequence SqC and sequences of Set II (Sq1-Sq5) have been placed within the Quaternary. Correlation of chronostratigraphic data with δ18O isotopic "sea level curves" also supports the hypothesis that sequences Sq1-Sq4 are fourth-order forced-regression sequences that record 100-120 kyr glacioeustatic cycles for the last 440-500 kyr, while sedimentary units labeled Sq5 would represent the transgressive and highstand deposition during the Holocene.
 
5. Publisher Organizing agency, location Universidade de São Paulo. Instituto Oceanográfico
 
6. Contributor Sponsor(s)
 
7. Date (YYYY-MM-DD) 2010-01-01
 
8. Type Status & genre Peer-reviewed Article
 
8. Type Type
 
9. Format File format PDF
 
10. Identifier Uniform Resource Identifier https://www.revistas.usp.br/bjoce/article/view/39521
 
10. Identifier Digital Object Identifier (DOI) http://dx.doi.org/10.1590/S1679-87592010000500003
 
11. Source Title; vol., no. (year) Brazilian Journal of Oceanography; Vol 58, No spe1 (2010)
 
12. Language English=en en
 
13. Relation Supp. Files
 
14. Coverage Geo-spatial location, chronological period, research sample (gender, age, etc.)
 
15. Rights Copyright and permissions Copyright (c)