The fundamental role of the Borborema and Benin–Nigeria provinces of NE Brazil and NW Africa during the development of the South Atlantic Cretaceous Rift system

Matos, Renato M. Darros de; Krueger, Ana; Norton, Ian O.; Casey, Katya

doi:10.1016/j.marpetgeo.2020.104872

Cited by 55 publications

(39 citation statements)

References 57 publications

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“…The Araripe Basin (Figure 1), located in northeastern Brazil, was generated from tec-tonic events associated with the break-up of the West Gondwana paleocontinent and the opening of the modern Southern and Equatorial Atlantic Ocean [43]. The structural framework of the basin is linked to the reactivation of Precambrian basement structures, posteriorly favoring the opening of intracontinental rifts aborted from the Brazilian Northeast Rift System [44][45][46].…”

Section: Geological Settingmentioning

confidence: 99%

Organic and Isotopic Geochemistry of Evaporites and Shales of the Santana Group (Araripe Basin, Brazil): Clues on the Evolution of Depositional Systems and Global Correlation during the Lower Cretaceous

et al. 2021

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Even being the more studied of the interior basins of Northeast Brazil, the Araripe Basin still lacks research in organic geochemistry designed to support interpretations of depositional systems and conditions of formation. This work aims to investigate the organic behavior of evaporites and shales from the Santana Group (Lower Cretaceous), as well as discuss their role in the evolution of its depositional systems. A total of 23 samples, 17 shales and six evaporites, were collected in outcrops and quarries. Analyses of Total Organic Carbon (TOC), Total Sulfur (TS), Rock Eval pyrolysis, and the δ34S isotope ratio were performed. The TOC results revealed high organic content for seven intervals, of which only five had high TS content. From the Rock Eval pyrolysis, dominance of the Type I kerogen was verified, thus corresponding to the best type of organic matter (mainly algal) for the generation of liquid and gaseous hydrocarbons. The Lower Cretaceous (probably Aptian) response to the progressive evolution in redox conditions is linked to a remarked Oceanic Anoxic Event (OAE-1a). The TOC/TS ratio suggests variable palaeosalinity, indicating most of the shales were formed under brackish waters with saline influence, yet tending to increase the salinity upwards where hypersaline conditions dominate in the Ipubi Formation. The isotope data also suggest the occurrence of marine ingressions in the depositional systems even prior to the well-documented event of the Romualdo Formation.

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Section: Geological Settingmentioning

confidence: 99%

Organic and Isotopic Geochemistry of Evaporites and Shales of the Santana Group (Araripe Basin, Brazil): Clues on the Evolution of Depositional Systems and Global Correlation during the Lower Cretaceous

et al. 2021

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“…Esta região representa, possivelmente, uma etapa tardia de evolução do Oceano Atlântico Sul Central, a partir do processo de propagação do rifte Cretácico (Fig. 2) (Matos, 1999, Matos et al, 2021Barbosa e Lima Filho, 2006;Buarque et al, 2016). A faixa costeira das bacias que formam a margem leste da PB é estreita, assim como a zona de plataforma destas bacias.…”

Section: Contexto Geológicounclassified

“…A faixa costeira das bacias que formam a margem leste da PB é estreita, assim como a zona de plataforma destas bacias. Este trecho da margem continental apresenta embasamento elevado que constitui um alto estrutural (Barbosa et al, 2007;Magalhães et al, 2013;Buarque et al, 2016;Matos et al, 2021). A espessura sedimentar na faixa costeira da Bacia Paraíba alcança valores máximos sobre os grabens de Miriri e Alhandra em torno de 250 m, e sobre o Graben de Itamaracá alcança cerca de de 400 m (Barbosa & Lima Filho, 2006;Barbosa et al, 2007).…”

Section: Contexto Geológicounclassified

“…Até o Albiano o alto estrutural que bordeja as bacias da Paraíba e Plataforma de Natal permaneceu elevado com o offset da sedimentação para a parte distal do rifte nesta área, o que resultou na ausência de depósitos desta idade na faixa costeira destas (Fig. 2) (Barbosa et al, 2007;Magalhães et al, 2013;Buarque et al, 2016;Matos et al, 2021). Embora a idade do break-up nesta região ainda seja motivo de debate, alguns autores têm sugerido que esta separação teria ocorrido no Albiano Inferior (Matos, 1999;Caixeta et al, 2015;Buarque et al, 2016).…”

Section: Contexto Geológicounclassified

“…Figura 2 -Paleomapa com a reconstrução do rifte Atlântico Sul-Equatorial Durante Aptiano (Adaptado de Matos et al 2021). A faixa de embasamento referente à plataforma continental das bacias da Paraíba e da Plataforma de Natal permaneceu elevada, o que resultou na ausência de depósitos do Aptiano e Albiano.…”

Section: Contexto Geológicounclassified

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Geologia De Superfície E Aspectos Estruturais Da Região De Rio Tinto, Faixa Costeira Da Bacia Da Paraíba

et al. 2021

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This work presents a geological 1:50.000 mapping survey for the Rio Tinto region, located in the coastal zone of Paraíba Basin, Miriri Sub-bacia. The mapping was supported by interpretation of satellite imagery, analysis of well lithologs, thin sections, and morphometric patterns. Basement rocks outcrops in approximately 10% of the study area, represented by Neoproterozoic granitoids. About 90% of the region is covered by Miocene-Pleistocene deposits and Quaternary sediments of the Barreiras, post-Barreiras formations, and coastal sandy and mangrove sediments, Pleistocene terraces, and Holocene eluvial-colluvial sediments. Analysis of cartography data and radar images showed that the relief is dominated by small plateaus and valleys formed by the Quaternary erosion of Barreiras Formation deposits, controlled by reactivation of the structural framework of the coastal zone. The Mamanguape River follows the homonymous fault, which trends ENE-WSW. The secondary drainage is also controlled by faults trending ENE-WSW, NW-SE, and N-S. Correlation of lithologs showed the occurrence of grabens and horsts formed during the late structural evolution of the coastal zone of the basin.

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Dinosaur Footprints Throughout Mesozoic Basins in Brazil

Carvalho

2024

Dinosaur Tracks of Mesozoic Basins in Brazil

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The fundamental role of the Borborema and Benin–Nigeria provinces of NE Brazil and NW Africa during the development of the South Atlantic Cretaceous Rift system

Cited by 55 publications

References 57 publications

Organic and Isotopic Geochemistry of Evaporites and Shales of the Santana Group (Araripe Basin, Brazil): Clues on the Evolution of Depositional Systems and Global Correlation during the Lower Cretaceous

Organic and Isotopic Geochemistry of Evaporites and Shales of the Santana Group (Araripe Basin, Brazil): Clues on the Evolution of Depositional Systems and Global Correlation during the Lower Cretaceous

Geologia De Superfície E Aspectos Estruturais Da Região De Rio Tinto, Faixa Costeira Da Bacia Da Paraíba

Dinosaur Footprints Throughout Mesozoic Basins in Brazil

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