A Ocorrência Da Formação Abaiara Na Bacia De Cedro E Suas Implicações Geotectônicas

Araújo, Iraclézia Gomes de; Filho, Mário Ferreira de Lima; Pedrosa, Flávia Azevedo

doi:10.18190/1980-8208/estudosgeologicos.v27n1p108-117

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“…The Cedro Basin is the largest of these with 690 km2, with the largest stretch axis according to the East-West direction (Carvalho 2001). This basin is formed by the formations: Cariri, Abaiara, Barbalha and Crato (Figure 8) (Araújo 2013;Araújo 2017). In the Cedro Basin, the Cariri Formation is characterized by medium sandstones with conglomerate levels and with crossstratifications (Figure 8A).…”

Section: Barro Socorro and Cedro Basinsmentioning

confidence: 99%

Review of the lithostratigraphy of the Mesozoic basins of the Borborema Province, Northeastern Brazil

Morais¹,

Silva²,

Santos³

et al. 2023

JGSB

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Several Phanerozoic sedimentary basins developed over the rocks of Borborema Province. The formation and opening of the Atlantic Ocean influenced tectonic events that reactivated large internal lineaments of the province (Transbrasiliano, Senator Pompeu, Patos and Pernambuco) culminating with several structures among them the grabens where the sediments of the intra-continental basins were deposited. This deformation played a fundamental role in the development of the continental margin basins that form the WNW-ESE and N-S segments of the Brazilian northeast. This work addresses the terrestrial portion of the Mesozoic basins inserted in the context of the Borborema Province and aims to provide a lithostratigraphic review plus some unpublished data of the inner basins and the Jatobá Basin. The descriptions of the marginal basins were subdivided by the following structural domains: dextral equatorial, orthogonal and sinistral south branching. The Ceará and Potiguar basins are part of the equatorial margin. The orthogonal domain encompasses the Pernambuco and Paraibá basins and is composed of the crustal block equivalent to the cross-sectional area of the Borborema Province, limited by the Pernambuco and Patos lineaments. The Sergipe-Alagoas basins are located in the sinistral branching. The intra-continental basins are equivalent to the failed rift arms that are composed of aborted rifts and semi-grabens of the inner basins of northeastern Brazil. The Recôncavo-Tucano-Jatobá rift system that was aborted still in the Lower Cretaceous is represented in the Borborema Province area by the Northern Tucano and Jatobá basins. The inner basins are concentrated in the region of the cross-sectional area, however, to the north of the Patos Lineament important basins occur such as Iguatu and Rio do Peixe. The basins of the orthogonal domain correspond to the final stretch of rift, being a late rupture in Aptian due to the rigidity of the basement. Due to the potential of oil exploration, the marginal basins are the ones that present data available in the literature the most. Both marginal basins with lower oil potential (such as the Pernambuco and Paraibá basins) and the inland basins of the northeast, covering the Jatobá, need more consistent lithostratigraphic update to consolidate and validate new proposed units. Review of the lithostratigraphy of the Mesozoic basins of the Borborema Province, Northeastern BrazilAccepted manuscript -Uncorrected pre-proof This is a PDF file containing an unedited and non-definitive version of a manuscript that has been accepted for publication by the Journal of the Geological Survey of Brazil -JGSB, which serves to provide early visibility of the article. Being an uncorrected preproof version, errors may appear during the production process (language review, formatting and proof review), and these can affect the final content of the article and all legal disclaimers (https://jgsb.cprm.gov.br/index.php/journal/6).

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Section: Barro Socorro and Cedro Basinsmentioning

confidence: 99%