Terrestrial and marine palynomorphs from deposits of the pull-apart rift of West Gondwana (Parnaíba Basin, northern Brazil): Biostratigraphy and relation to tectonic events

Ferreira, Neila Nunes; Ferreira, Elizabete P.; Ramos, Renato Rodríguez Cabral; Carvalho, Ismar de Souza

doi:10.1016/j.jsames.2020.102612

Cited by 18 publications

(3 citation statements)

References 18 publications

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“…to another with more than 275 Ma. ( Pedrão et al, 1993 a, b;Ferreira et al, 2016Ferreira et al, , 2020Conceição et al, 2016). The surface of the eastern block of the fault was later eroded since the region does not show great topographical differences but subtle alterations in the elevations in the relief.…”

Section: Discussionmentioning

confidence: 99%

Tectonic aspects of the Rio Parnaíba Lineament, Duque Bacelar Region, Maranhão State, based on the record of Dinosauria, Spinosaurinae

Arcanjo

Sousa

Medeiros

et al. 2023

Rev. bras. paleontol.

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This article shows the tectonic influence of the Parnaíba River Lineament located in the Parnaíba Basin through a paleontological finding of a Cretaceous age close to a Permian sequence. The studied region is in the northeast of the State of Maranhão, near the town of Duque Bacelar, in the vicinity of the lineament. A normal fault in the NNE-SSW direction was responsible for the lowering of the Itapecuru Formation strata (Cretaceous) and the relative upward movement of the Pedra de Fogo Formation (Permian). The unprecedented finding of a Mesozoic (mid-Cretaceous) theropod tooth located topographically at the same level as a Paleozoic unit represents evidence of tectonic activity affecting the stratigraphic successions of the Parnaíba Basin. Keywords: Parnaíba River Lineament, Pedra de Fogo Formation, Itapecuru Formation, Spinosauridae.

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Section: Discussionmentioning

confidence: 99%

Tectonic aspects of the Rio Parnaíba Lineament, Duque Bacelar Region, Maranhão State, based on the record of Dinosauria, Spinosaurinae

Arcanjo

Sousa

Medeiros

et al. 2023

Rev. bras. paleontol.

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“…Os picos de abundância dos gêneros Crybelosporites, Cicatricosisporites e Cyathidites entre as profundidades de 28 m a 31,9 m, 35,65 m a 36,7 m, e 41,15 m a 44,55 m indicam fases de maior umidade. O ambiente, nestas profundidades, é considerado moderadamente úmido, evidenciado pelo gênero Cicatricosisporites que não é típico de condições extremas, seja de aridez ou de umidade (Duarte et al, 2012). A espécie Crybelosporites pannuceus, indicativa de ambientes aquáticos (Puebla et al, 2015), possui picos de abundância entre as profundidades 31,2 m a 31,9 m e 35,65 m a 36,7 m, o que permite inferir que havia redes de drenagens bem instaladas no momento da deposição dos sedimentos.…”

Section: Idadeunclassified

Palinologia Da Formação Codó, Bacia Do Parnaíba: Idade E Paleoambiente Deposicional

ENEAS,

ANTONIOLI,

SOUZA-LIMA

et al. 2023

Geociencias

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Os depósitos siliciclásticos da Formação Codó possuem significativo potencial para geração de hidrocarbonetos no Cretáceo Inferior da Bacia do Parnaíba. Da análise do conteúdo palinológico de 44 amostras do poço 9-PAG-8-MA, foi possível tecer considerações relacionadas ao seu posicionamento temporal e identificar seu paleoambiente deposicional e respectivo paleoclima. Foram identificadas 96 espécies de palinomorfos, predominantemente de origem continental. A presença das espécies-guia Sergipea variverrucata e Equisetosporites maculosus permitiram posicionar bioestratigraficamente os estratos nas palinozonas Sergipea variverrucata (P-270) e Complicatisaccus cearensis (P-280), correspondendo ao neoaptiana. Dinocistos do gênero Subtilisphaera atestam a ocorrência de ingressões marinhas ao longo da sedimentação. Os sedimentos depositaram-se em um ambiente dominantemente continental (flúvio-lacustre), gradando para um ambiente transicional costeiro a marinho restrito, com registros de ingressões marinhas e sob um paleoclima árido a semiárido, evidenciado pelo predomínio de grãos de pólen dos gêneros Classopollis, Gnetaceaepollenites e Equisetosporites. O aumento na frequência relativa dos gêneros Crybelosporites e Cicatricosisporites, observado em dois níveis estratigráficos, sugerem momentos de semiaridez ao longo da deposição, que podem estar relacionadas a redução na salinidade, visto o aumento da frequência relativa de Afropollis e diminuição de Classopollis. O conteúdo palinoflorístico identificado apresenta características que permitem o enquadramento na província palinoflorística a Dicheiropollis etruscus/Afropollis.

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“…In this basin, in the rocks corresponding to the Alagoas local Brazilian Stage, only the Sergipea variverrucata and Cicatricosisporites avnimelechi palynozones have been registered, the first being the oldest. Below the Sergipea variverrucata palynozone, typical palynozones of the base of the Alagoas local Brazilian Stage are absent, including the Tucanopollis crisopolensis (= Clavatipollenites crisopolensis) palynozone, which is a marker of the EM-5 Microfloristic Event, that is correlated to the base of the lower portion of the Aptian in Brazilian and African basins (Arai et al, 1989 and references;Ferreira et al, 2020). Teixeira et al (2017) detected specimens of Sergipea variverrucata at the base and top of 'Sítio Sobradinho', constraining the Romualdo Member age to the late Aptian.…”

Section: Microfossils Vs Rhenium-osmium Isotope Datamentioning

confidence: 99%

Age of the Post-rift Sequence I from the Araripe Basin, Lower Cretaceous, NE Brazil: implications for spatio-temporal correlation

Coimbra

Freire

2021

Rev. bras. paleontol.

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A robust biostratigraphic zonation based on microfossils supports the stratigraphic framework and correlation of the interior basins of the Lower Cretaceous of NE Brazil. This zonation has also allowed correlations with coeval sections in the Brazilian marginal basins and in the Gabon and Congo basins (central-west Africa). These records, consisting mainly of non-marine sediments, were a great challenge with regard to the correlation with the International Chronostratigraphic Chart. Therefore, local stages were used, the most recent being the Alagoas local Brazilian Stage, with which the Post-rift Sequence I of the Araripe Basin is related. Regarding lithostratigraphy, this sequence includes the Rio da Batateira (Barbalha for some authors) and Santana formations, the last one with the famous Crato, Ipubi, and Romualdo members, from the base to the top. Although currently there is a consensus on the age of the Alagoas local Brazilian Stage in the Araripe Basin, recently a new age for at least part of the Post-rift Sequence I was proposed. This new proposal, based on isotopic analysis of Re-Os, arose as a panacea to correlate the Rio da Batateira Formation and the Crato and Ipubi members with the international stages. Surprisingly, their authors, although on the one hand, they seem to underestimate biostratigraphic results, on the other they seek to support their proposal from microfossils studied by previous authors, but they do so in an inappropriate way, leading readers to misinterpret their results. Therefore, this paper presents a critical review on the age of the Alagoas local Brazilian Stage in the Araripe Basin and nearby basins, refuting a Barremian age for part of the Post-rift Sequence I. Keywords: Alagoas local Brazilian Stage, biostratigraphy, ostracods, palynomorphs, radiometric ages.

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Terrestrial and marine palynomorphs from deposits of the pull-apart rift of West Gondwana (Parnaíba Basin, northern Brazil): Biostratigraphy and relation to tectonic events

Cited by 18 publications

References 18 publications

Tectonic aspects of the Rio Parnaíba Lineament, Duque Bacelar Region, Maranhão State, based on the record of Dinosauria, Spinosaurinae

Tectonic aspects of the Rio Parnaíba Lineament, Duque Bacelar Region, Maranhão State, based on the record of Dinosauria, Spinosaurinae

Palinologia Da Formação Codó, Bacia Do Parnaíba: Idade E Paleoambiente Deposicional

Age of the Post-rift Sequence I from the Araripe Basin, Lower Cretaceous, NE Brazil: implications for spatio-temporal correlation

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