Cretaceous to Recent tectono‐sedimentary history and subsidence of the Barreirinhas, Ceará and Potiguar Basins, Brazilian Equatorial Margin
Abstract Stratigraphy along the Brazilian Equatorial Margin is a crucial guide to the geodynamic history of rifting of Pangea and formation of the South Atlantic Ocean. Understanding the evolution of the Brazilian Equatorial Margin, which intersects the Saint Paul and Romanche Fracture Zones on the...
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crwiley:10.1111/bre.12810 2024-09-15T18:36:22+00:00 Cretaceous to Recent tectono‐sedimentary history and subsidence of the Barreirinhas, Ceará and Potiguar Basins, Brazilian Equatorial Margin Basilone, Luca Roberts, Gareth G. Maia de Almeida, Narelle Fernandes, Victoria M. de Souza, Ana Clara Braga Alves, Daniel P. V. Jovane, Luigi Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Fundação de Amparo à Pesquisa do Estado de São Paulo 2023 http://dx.doi.org/10.1111/bre.12810 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bre.12810 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Basin Research volume 36, issue 1 ISSN 0950-091X 1365-2117 journal-article 2023 crwiley https://doi.org/10.1111/bre.12810 2024-08-27T04:27:02Z Abstract Stratigraphy along the Brazilian Equatorial Margin is a crucial guide to the geodynamic history of rifting of Pangea and formation of the South Atlantic Ocean. Understanding the evolution of the Brazilian Equatorial Margin, which intersects the Saint Paul and Romanche Fracture Zones on the western margin of South Atlantic Ocean, is also key for reconstructing eustatic histories and natural resource exploration. In this study, we quantify the stratigraphic and subsidence histories of three sedimentary basins—Barreirinhas, Ceará, Potiguar—that sit within the margin. Stratigraphy was mapped using ca. 900‐line‐km of two‐dimensional seismic data. Biostratigraphic and check‐shot data from 23 wells drilled on the continental shelf, slope and in the distal parts of these basins were used to date and depth‐convert stratigraphy. Check‐shot data were also used to parameterise compaction. The mapped stratigraphy was backstripped to calculate subsidence histories for the basins. Subsidence curves were decompacted, water‐loaded and corrected for palaeo‐water depths using biostratigraphic data from well reports. The mapped stratigraphy of the Barreirinhas and Ceará Basins and theoretical subsidence curves indicate that stretching factors did not exceed 1.6. These values suggest that these basins can be regarded as failed rifts. In contrast, more distal stratigraphy mapped in the Potiguar Basin to the south indicates that it stretched by a factor of 5–6. Calculated subsidence histories indicate that this basin formed primarily because of Cretaceous rifting and Cretaceous to Recent post‐rift thermal sag, with amplitudes governed by the amount of initial stretching. Article in Journal/Newspaper South Atlantic Ocean Wiley Online Library Basin Research 36 1 |
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English |
description |
Abstract Stratigraphy along the Brazilian Equatorial Margin is a crucial guide to the geodynamic history of rifting of Pangea and formation of the South Atlantic Ocean. Understanding the evolution of the Brazilian Equatorial Margin, which intersects the Saint Paul and Romanche Fracture Zones on the western margin of South Atlantic Ocean, is also key for reconstructing eustatic histories and natural resource exploration. In this study, we quantify the stratigraphic and subsidence histories of three sedimentary basins—Barreirinhas, Ceará, Potiguar—that sit within the margin. Stratigraphy was mapped using ca. 900‐line‐km of two‐dimensional seismic data. Biostratigraphic and check‐shot data from 23 wells drilled on the continental shelf, slope and in the distal parts of these basins were used to date and depth‐convert stratigraphy. Check‐shot data were also used to parameterise compaction. The mapped stratigraphy was backstripped to calculate subsidence histories for the basins. Subsidence curves were decompacted, water‐loaded and corrected for palaeo‐water depths using biostratigraphic data from well reports. The mapped stratigraphy of the Barreirinhas and Ceará Basins and theoretical subsidence curves indicate that stretching factors did not exceed 1.6. These values suggest that these basins can be regarded as failed rifts. In contrast, more distal stratigraphy mapped in the Potiguar Basin to the south indicates that it stretched by a factor of 5–6. Calculated subsidence histories indicate that this basin formed primarily because of Cretaceous rifting and Cretaceous to Recent post‐rift thermal sag, with amplitudes governed by the amount of initial stretching. |
author2 |
Coordenação de Aperfeiçoamento de Pessoal de Nível Superior Fundação de Amparo à Pesquisa do Estado de São Paulo |
format |
Article in Journal/Newspaper |
author |
Basilone, Luca Roberts, Gareth G. Maia de Almeida, Narelle Fernandes, Victoria M. de Souza, Ana Clara Braga Alves, Daniel P. V. Jovane, Luigi |
spellingShingle |
Basilone, Luca Roberts, Gareth G. Maia de Almeida, Narelle Fernandes, Victoria M. de Souza, Ana Clara Braga Alves, Daniel P. V. Jovane, Luigi Cretaceous to Recent tectono‐sedimentary history and subsidence of the Barreirinhas, Ceará and Potiguar Basins, Brazilian Equatorial Margin |
author_facet |
Basilone, Luca Roberts, Gareth G. Maia de Almeida, Narelle Fernandes, Victoria M. de Souza, Ana Clara Braga Alves, Daniel P. V. Jovane, Luigi |
author_sort |
Basilone, Luca |
title |
Cretaceous to Recent tectono‐sedimentary history and subsidence of the Barreirinhas, Ceará and Potiguar Basins, Brazilian Equatorial Margin |
title_short |
Cretaceous to Recent tectono‐sedimentary history and subsidence of the Barreirinhas, Ceará and Potiguar Basins, Brazilian Equatorial Margin |
title_full |
Cretaceous to Recent tectono‐sedimentary history and subsidence of the Barreirinhas, Ceará and Potiguar Basins, Brazilian Equatorial Margin |
title_fullStr |
Cretaceous to Recent tectono‐sedimentary history and subsidence of the Barreirinhas, Ceará and Potiguar Basins, Brazilian Equatorial Margin |
title_full_unstemmed |
Cretaceous to Recent tectono‐sedimentary history and subsidence of the Barreirinhas, Ceará and Potiguar Basins, Brazilian Equatorial Margin |
title_sort |
cretaceous to recent tectono‐sedimentary history and subsidence of the barreirinhas, ceará and potiguar basins, brazilian equatorial margin |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1111/bre.12810 https://onlinelibrary.wiley.com/doi/pdf/10.1111/bre.12810 |
genre |
South Atlantic Ocean |
genre_facet |
South Atlantic Ocean |
op_source |
Basin Research volume 36, issue 1 ISSN 0950-091X 1365-2117 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/bre.12810 |
container_title |
Basin Research |
container_volume |
36 |
container_issue |
1 |
_version_ |
1810479997187522560 |