The Barreirinhas Basin internal architecture and the evidence of transform movements along the Romanche Fracture Zone, Brazilian Equatorial Margin

Montenegro, Candido; Gomes, Moab Praxedes; Castro, David Lopes de; Pérez, Yoe Alain Reyes; Oliveira, Diógenes Custódio de

doi:10.1016/j.jsames.2020.103049

Cited by 8 publications

(12 citation statements)

References 32 publications

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“…Water‐loaded subsidence curves are shown as dashed blue lines in Figure 7). Palaeobathymetry values,

W_{d}

, are derived from sedimentological and palaeoecological evidence, including micropalaeontological methods and constraints from same lithologies described by Trosdtorf et al (2007), Condé et al (2007), Pessoa Neto et al (2007), Jovane et al (2016), Lopes et al (2018), Montenegro et al (2021) and Leckie and Olson (2003). They are discussed in detail for each basin below and given in Tables 1–3.…”

Section: Resultsmentioning

confidence: 99%

“…The lack of well‐defined magnetic anomalies in the early history of the ocean (i.e., the lack of reversal‐related magnetic anomalies on crust of age 121 to 83.6 Myr old) along this part of the margin contributes to uncertainties in plate reconstructions for this area (see, e.g., Granot & Dyment, 2015). An important challenge is quantifying how stretching, post‐rift cooling, fracture zones and the formation of seamounts impacted the structure and stratigraphy of margin (de Castro et al, 2012; Jovane et al, 2016; Lopes et al, 2018; Maia de Almeida, Alves, Nepomuceno Filho, Freire, de Souza, et al, 2020; Matos, 1992, 1999, 2000; Montenegro et al, 2021; Tavares et al, 2022). We seek to constrain the geodynamic history of the BEM during and after rifting by quantifying the history of subsidence recorded by stratigraphy.…”

Section: Introductionmentioning

confidence: 99%

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Cretaceous to Recent tectono‐sedimentary history and subsidence of the Barreirinhas, Ceará and Potiguar Basins, Brazilian Equatorial Margin

et al. 2023

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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.

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“…Water‐loaded subsidence curves are shown as dashed blue lines in Figure 7). Palaeobathymetry values,

W_{d}

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Cretaceous to Recent tectono‐sedimentary history and subsidence of the Barreirinhas, Ceará and Potiguar Basins, Brazilian Equatorial Margin

et al. 2023

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“…During the Pangea breakup, the rift stage started on Aptian (125 Ma) and extended until the Albian (102 Ma), setting up the conjugate margins of Barreirinhas (Brazil), Ivory Coast (Ivory Coast) and Tano (Ghana) basins (Basile et al,1993;Soares et al, 2007). The rifting generated E to ENE trending rhombic grabens lled with thick non-marine sediments (Davison et al, 2016;Montenegro et al, 2021). The end of the rift stage was in 112 Ma, forming anoxic salt lagoons in a sag setting (Codó Formation) and endured until 102 Ma, when the BEM and West Africa were completely separated, establishing a breakup discordance (Soares et al, 2007;Antobreh et al, 2009).…”

Section: Barreirinhas Basinmentioning

confidence: 99%

Shallow Strata Expressions of Leakage and Seepage Structures Associated With Hydrocarbon Migration: a Seismic Analysis on Offshore Barreirinhas Basin, Brazilian Equatorial Margin

Delabrida,

Gomes,

de Castro

et al. 2024

Preprint

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The Brazilian Equatorial Margin (BEM) is an oblique-transform segment with counterparts in the Gulf of Guinea on the West Africa Margin, inherited from the Pangea breakup and Atlantic Ocean opening. These areas are exploratory frontiers where recently petroleum systems were found in deep- and ultra-deep waters. The strike-slip Barreirinhas Basin, at the central portion of the BEM, is conjugated with the oil and gas producers Ivory Coast and Tano basins, whereas the Barreirinhas Basin has currently no relevant discovered petroleum reservoirs. This present study aimed to identify and map distribution patterns of leakage and seepage features in shallow strata, indicating potential hydrocarbon migration and accumulation along the offshore Barreirinhas Basin. The investigation used conventional 2D seismic reflection data with additional application of seismic attributes, including RMS amplitude, instantaneous amplitude, instantaneous frequency, and chaos. Diverse hydrocarbon leakage and seepage structures were identified, including faults, gas chimneys, pockmarks, hydrocarbon-derived diagenetic zones, bottom simulating reflectors, and mounds. Regional morphological and stratigraphic structures constrain the zones of fluid leakage and seepage, which indicate potential hydrocarbon migration pathways. In the eastern lower continental slope and continental rise, regional faults and gas chimneys control seep formation. On the central to northern sectors of the continental rise and abyssal plain, several deep-water mounds are linked by large gas chimneys and faults. There are gravitational gliding systems on the western and central portions of the basin, where the extensional domain is characterized by listric faults, negative flower structures, and gas chimneys that produce cold seeps on the outer shelf and upper slope. These structural controls are related to the compressional domain of the lower continental slope and continental rise, where the decollement zone and a series of faults and folds are correlated to pockmarks and deep-water mounds. Near the western compressional domain, igneous intrusions control the development of leaking faults, gas chimneys, bright spots, and pockmarks. These hydrocarbon-derived structures, seeps, and pathways of fluid migration in deep-water indicate potential petroleum systems in the Albian to Turonian-Oligocene tectono-sedimentary sequences in the central sector of the Brazilian Equatorial Margin.

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“…These rifted margins are narrow (×10 km; e.g. Greenroyd et al, 2008;Jeanniot & Buiter, 2018;Loparev et al, 2021;Montenegro et al, 2021;Museur et al, 2020;Sapin et al, 2016;Ye et al, 2019;Figures 2a and 13b). Narrow margins result from narrow lithosphere necking and are associated with rapid and early tectonic subsidence in the associated basins (e.g.…”

Section: Geodynamical Context and Timing Of The Retrograding Mega-seq...mentioning

confidence: 99%

“…The rifted margins of the Equatorial Segment (Figure 1) are generally narrow (20–100 km; Jeanniot & Buiter, 2018; Loparev et al, 2021; Montenegro et al, 2021; Sapin et al, 2016; Ye et al, 2019; Figure 2a). This is related to the fact that the Equatorial Atlantic rift was formed at high obliquity by right‐lateral shearing between South America and Africa (e.g.…”

Section: The South and Equatorial Atlantic Oceansmentioning

confidence: 99%

Meta‐analysis of the long‐term stratigraphic evolution of rifted margin basins: The GeoDyNamical Analysis approach applied to the South Atlantic Ocean

et al. 2022

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Models of the formation of rifted margins have significantly evolved over the last decades by identifying new styles of crustal thinning and magmatic production. However, the expression of these different processes in the depositional environments of the overlying basins remains to be determined. Using only published data, we integrated the sedimentary evolution of 21 basins of the Equatorial, Central and South segments of the South Atlantic that record various styles of crustal thinning and magmatic production. To compare these basins that underwent rifting at different times, we developed a new type of analysis allowing to evaluate statistically the (dis)similarities in depositional environment trends by normalizing them to the tectonic phases of the basin (syn‐rift, transition and post‐rift) rather than the stratigraphic or absolute ages: The GeoDyNamical Analysis. We show that the timing of the long‐term retrograding mega‐sequence driven by lithosphere thinning depends on the deformation style and magma production. Along oblique margins of the Equatorial Segment, deepening initiated during syn‐rift because their narrow crustal thinning style favours rapid tectonic subsidence surpassing sediment supply. Along wide margins of the Central Segment, deepening is initiated later, at the end of the transition phase, because depth‐dependent thinning favours slow tectonic subsidence and late break‐up. Along magma‐rich margins of the South Segment, deepening is initiated during the transition phase, after volcanics stopped filling accommodation created by subsidence. In the Central Segment, evaporites accumulated during the second half of the transition phase, when crustal thinning ceased in the proximal margin and migrated to its distal part. Immediately before and during evaporites accumulation, sediments recorded continental and coastal depositional environments resulting from the limited thermal subsidence in the proximal margin domain. Evaporite deposition lasted until the initiation of retrograding mega‐sequence, at the onset of the post‐rift phase and the end of crustal thinning in the distal margin.

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The Barreirinhas Basin internal architecture and the evidence of transform movements along the Romanche Fracture Zone, Brazilian Equatorial Margin

Cited by 8 publications

References 32 publications

Cretaceous to Recent tectono‐sedimentary history and subsidence of the Barreirinhas, Ceará and Potiguar Basins, Brazilian Equatorial Margin

Cretaceous to Recent tectono‐sedimentary history and subsidence of the Barreirinhas, Ceará and Potiguar Basins, Brazilian Equatorial Margin

Shallow Strata Expressions of Leakage and Seepage Structures Associated With Hydrocarbon Migration: a Seismic Analysis on Offshore Barreirinhas Basin, Brazilian Equatorial Margin

Meta‐analysis of the long‐term stratigraphic evolution of rifted margin basins: The GeoDyNamical Analysis approach applied to the South Atlantic Ocean

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