Depositional, diagenetic and stratigraphic aspects of Macaé Group carbonates (Albian): Example from an oilfield from Campos Basin

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dc.contributor.authorOkubo, Juliana [UNESP]
dc.contributor.authorLykawka, Ricardo
dc.contributor.authorWarren, Lucas Veríssimo [UNESP]
dc.contributor.authorFavoreto, Julia [UNESP]
dc.contributor.authorDias-Brito, Dimas [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionPetrobras
dc.date.accessioned2018-12-11T16:57:45Z
dc.date.available2018-12-11T16:57:45Z
dc.date.issued2015-01-01
dc.description.abstractCarbonate rocks from the Macaé Group (Albian) represent an example of carbonate sedimentation related to the drift phase in Campos Basin. This study presents depositional features, integrating them with diagenetic and stratigraphic aspects of the Macaé Group carbonates including the upper part of the Quissamã Formation and the lower part of the Outeiro Formation. Macroscopic analyses in cores and microscopic ones in thin sections allowed the recognition of eleven sedimentary facies - nine of them corresponding to the Quissamã Formation and two of them representing the Outeiro Formation. These facies were grouped into five facies associations. Oolitic grainstones and oncolitic grainstones are interpreted to be deposited in shallow depth probably in shoals above the fair weather wave base. The interbanks between shoals were formed in less agitated waters and characterized by deposition of peloidal bioclastic packstones and wackestones representative of sedimentation in calm waters. Bioclastic packstones and oolitic packstones/wackestones represent allochthonous deposits related to the beginning of the regional drowning that occur in upper Quissamã Formation. Pithonellids wackestones and bioclastic wackestones with glauconite are related to deep water deposits, characteristics of the Outeiro Formation. Post-depositional features revealed the action of diagenetic processes as, micritization, cimentation, dissolution, compaction, dolomitization and recrystallization occurred during the eoand mesodiagenesis phases. Vertical facies analysis suggests shallowing upward cycles stacked in a sequence progressively deeper towards the top (from the Quissamã Formation to the Outeiro Formation).en
dc.description.affiliationPrograma de Pós-Graduação em Geologia Regional, Instituto de Geociências e Ciências Exatas, Universidade Estadual Paulista - UNESP
dc.description.affiliationPetrobras
dc.description.affiliationDepartamento de Geologia Aplicada, Instituto de Geociências e Ciências Exatas, Universidade Estadual Paulista - UNESP
dc.description.affiliationUnespPrograma de Pós-Graduação em Geologia Regional, Instituto de Geociências e Ciências Exatas, Universidade Estadual Paulista - UNESP
dc.description.affiliationUnespDepartamento de Geologia Aplicada, Instituto de Geociências e Ciências Exatas, Universidade Estadual Paulista - UNESP
dc.format.extent243-258
dc.identifierhttp://dx.doi.org/10.1590/23174889201500020005
dc.identifier.citationBrazilian Journal of Geology, v. 45, n. 2, p. 243-258, 2015.
dc.identifier.doi10.1590/23174889201500020005
dc.identifier.fileS2317-48892015000200243.pdf
dc.identifier.issn2317-4692
dc.identifier.issn2317-4889
dc.identifier.lattes1333845337012256
dc.identifier.scieloS2317-48892015000200243
dc.identifier.scopus2-s2.0-84936862328
dc.identifier.urihttp://hdl.handle.net/11449/171926
dc.language.isoeng
dc.relation.ispartofBrazilian Journal of Geology
dc.relation.ispartofsjr0,608
dc.relation.ispartofsjr0,608
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectCarbonate rocks
dc.subjectDiagenesis
dc.subjectFacies
dc.subjectFormation
dc.subjectOuteiro formation
dc.subjectQuissamã
dc.titleDepositional, diagenetic and stratigraphic aspects of Macaé Group carbonates (Albian): Example from an oilfield from Campos Basinen
dc.typeArtigo
unesp.author.lattes1333845337012256

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Artigos - Geologia Aplicada - IGCE