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ANÁLISE DA CICLICIDADE IMPRESSA NO REGISTRO SEDIMENTAR DA SEÇÃO NEO-APTIANA / EOCENOMANIANA (FM. RIACHUELO) NA BACIA DE SERGIPE-ALAGOAS

2005; Sociedade Brasileira de Geologia; Volume: 35; Linguagem: Inglês

10.25249/0375-7536.200535ete107114

ISSN

2177-4382

Autores

José Milton Cronemberger Mendes,

Tópico(s)

Paleontology and Stratigraphy of Fossils

Resumo

Qualitative analysis using well logs and inter basin correlation confirms the importance of orbital mechanisms in determining cyclic patterns in the Neo-Aptian/Eocenomanian stratigraphic succession in the Sergipe/Alagoas Basin. The use of statistics softwares applied to the data resulted in a high degree of similarity between both depositional and orbital cycles in the "Milankovitch band". Quantitative cyclicity analysis in the studied section allowed a detailed stratigraphic subdivision, not possible using traditional tools like seismic and biostratigraphic data. The estimate of sedimentary rates and depositional/erosional hiatuses during the deposition of the mapped sedimentary sequences, using the identified cycles and biostratigraphic data, made possible a better understanding of the studied stratigraphic section.

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