The basal siliciclastic Silurian-Devonian Tacaratu formation of the Jatobá basin: Analysis of facies, provenance and palaeocurrents

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dc.contributor.authorCarvalho, Rizelda Regadas de
dc.contributor.authorNeumann, Virgínio Henrique
dc.contributor.authorFambrini, Gelson Luis
dc.contributor.authorAssine, Mário Luis [UNESP]
dc.contributor.authorVieira, Marcela Marques
dc.contributor.authorRocha, Dunaldson Eliézer Guedes Alcoforado da
dc.contributor.authorRamos, Germano Mário Silva
dc.contributor.institutionIPA
dc.contributor.institutionUniversidade Federal de Pernambuco (UFPE)
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionDGEO-UFRN
dc.contributor.institutionCPRM-Serviço Geológico do Brasil
dc.date.accessioned2018-12-11T17:22:20Z
dc.date.available2018-12-11T17:22:20Z
dc.date.issued2018-12-01
dc.description.abstractThe Silurian-Devonian Tacaratu Formation represents the basal siliciclastic sequence of the Jatobá Basin and is the focus of this study. Provenance and palaeocurrent studies are fundamental to the analysis and understanding of the surface diagenetic evolution and tectonic evolution of sedimentary basins. Field work (stratigraphic logs and sedimentary structures) and laboratory studies (petrography) were used for characterization this sedimentary fill. The Tacaratu Formation is comprised of sandstones varying from medium-to coarse-grained with conglomeratic levels. Seven main lithofacies have been identified and described: poorly stratified, matrix to clast-supported conglomerates; trough cross-stratified conglomerates; cross-stratified clast-supported conglomerates; cross-stratified pebbly sandstones; coarse-to medium-grained sandstones with trough cross-stratification; coarse-to medium-grained sandstones with planar cross–stratification; and horizontally stratified sandstones. The compositional analysis of 20 sandstone samples revealed homogeneity and compositional regularity among the samples. Fifty per cent of the sedimentary rocks were classified as quartz arenite, 40% as sub-litharenite, and 10% as subarkose. The provenance of these sandstones indicates a stable craton origin, with tectonic events at the margin of the basin. Diagenesis has evolved from eodiagenesis through mesodiagenesis to telodiagenesis. Palaeocurrent readings show a consistent trend to the NNW and a secondary mode to the NE. Palaeocurrent readings point to the São Francisco Craton as the main source area - more precisely the resistant areas of the Borborema Province.en
dc.description.affiliationInstituto Agronômico de Pernambuco IPA
dc.description.affiliationDepartamento de Geologia DGEO-UFPE
dc.description.affiliationDepartamento de Geologia Aplicada UNESP (Rio Claro)
dc.description.affiliationDepartamento de Geologia DGEO-UFRN
dc.description.affiliationCPRM-Serviço Geológico do Brasil
dc.description.affiliationUnespDepartamento de Geologia Aplicada UNESP (Rio Claro)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipFinanciadora de Estudos e Projetos
dc.description.sponsorshipIdCNPq: 556221/2008-7
dc.format.extent94-106
dc.identifierhttp://dx.doi.org/10.1016/j.jsames.2018.07.004
dc.identifier.citationJournal of South American Earth Sciences, v. 88, p. 94-106.
dc.identifier.doi10.1016/j.jsames.2018.07.004
dc.identifier.file2-s2.0-85052245864.pdf
dc.identifier.issn0895-9811
dc.identifier.lattes0471102133658128
dc.identifier.scopus2-s2.0-85052245864
dc.identifier.urihttp://hdl.handle.net/11449/176749
dc.language.isoeng
dc.relation.ispartofJournal of South American Earth Sciences
dc.relation.ispartofsjr0,829
dc.rights.accessRightsAcesso aberto
dc.sourceScopus
dc.subjectDiagenesis
dc.subjectPalaeocurrents
dc.subjectSandstone provenance
dc.subjectTacaratu formation
dc.titleThe basal siliciclastic Silurian-Devonian Tacaratu formation of the Jatobá basin: Analysis of facies, provenance and palaeocurrentsen
dc.typeArtigo
unesp.author.lattes0471102133658128
unesp.author.orcid0000-0001-9663-2229[3]

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