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vol.25 suppl.1Estruturas rasas de gás em sedimentos no estuário Potengi (nordeste do Brasil) índice de autoresíndice de assuntospesquisa de artigos
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Revista Brasileira de Geofísica

versão impressa ISSN 0102-261X

Resumo

ARTUSI, Lucia  e  FIGUEIREDO JR., Alberto Garcia de. Sismografia rasa da plataforma continental de Cabo Frio - Araruama - RJ. Rev. Bras. Geof. [online]. 2007, vol.25, suppl.1, pp. 7-16. ISSN 0102-261X.  http://dx.doi.org/10.1590/S0102-261X2007000500002.

Seismic sections on the continental shelf adjacent to Araruama lagoon, Rio de Janeiro state, allowed the mapping of the acoustic basement and the seismic analysis of the sedimentary cover until the middle continental shelf (~ 110 m). The acoustic basement outcrops in the northwest sector of the study area, while it is buried under 200 m of the sediments in the southeast sector (middle shelf). Four seismic sequences (SI, SII, SIII and SIV) limited by four unconformities (DI, DII, DIII and DIV) were identified in the sedimentary section recovering the acoustic basement. Correlation between the seismic analysis and previous studies in the area suggest that the sequence deposition started in the Upper Miocene.

Palavras-chave : marine Quaternary; shallow seismic; Cabo Frio High; paleochannels.

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