Role of structural inheritance and salt tectonics in the formation of pseudosymmetric continental rifts on the european margin of the hyperextended Mauléon basin (Early Cretaceous Arzacq and Tartas Basins)

Issautier, Benoît; Saspiturry, Nicolas; Serrano, Olivier

doi:10.1016/j.marpetgeo.2020.104395

Cited by 21 publications

(33 citation statements)

References 92 publications

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“…The resulting palaeogeography was a homogeneous, flat-floored basin with no major brittle deformation recorded within the basin. High subsidence rates are consistent with ductile pure shear thinning of the lower/middle crust and formation of a symmetric syn-rift basin (Issautier et al, 2020). This regime was probably enhanced by the presence of a thick evaporite layer of Rhaetian-Hettangian age that favoured mechanical decoupling between the pre-rift sediments and the basement.…”

Section: Tartas Basinsupporting

confidence: 52%

“…Sediments from this period range from marginal littoral facies (Berriasian to Barremian; e.g. Issautier et al, 2020) to innerplatform facies (Aptian and Albian; e.g. Arnaud-Vanneau et al, 1979;Bouroullec et al, 1979;Delfaud, 1969;Peybernès, 1979Peybernès, , 1982.…”

Section: Tartas Basinmentioning

confidence: 99%

“…This regime was probably enhanced by the presence of a thick evaporite layer of Rhaetian-Hettangian age that favoured mechanical decoupling between the pre-rift sediments and the basement. This salt blanket may account for the lack of illustrated brittle structures in the synrift succession of the Tartas basin (Issautier et al, 2020).…”

Section: Tartas Basinmentioning

confidence: 99%

“…Early Mesozoic rifting (Triassic to Hettangian) was responsible for a high subsidence rate and the deposition of a thick anhydrite sequence (Curnelle, 1983). The basin's subsequent rifting history was characterised by two successive extensional regimes, the first one symmetric (Berriasian to Aptian) and the second one slightly asymmetric (Albian; Issautier et al, 2020). The symmetric syn-rift stage, identical to that of the Tartas basin, was accommodated by ductile flow of the lower/middle continental crust.…”

Section: Arzacq Basinmentioning

confidence: 99%

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Review of Iberia–Eurasia plate‐boundary basins: Role of sedimentary burial and salt tectonics during rifting and continental breakup

et al. 2021

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We document the role of sedimentary burial and salt tectonics in controlling the deformation style of continental crust during hyperextension. The Iberian-European boundary records a complex history of Cretaceous continental extension, which has led to the development of so-called smooth-slope type basins. Based on the review of the available geological constraints (crustal-balanced cross-sections, sedimentary profile evolution, RSCM thermometer, low-temperature thermochronology) and geophysical data (Bouguer anomaly, Moho depth, seismic reflection profiles and Vp/Vs velocity models) on the Tartas, Arzacq, Cameros, Parentis, Columbrets, Mauléon, Basque-Cantabrian and Internal Metamorphic Zone basins, we shed light on the main characteristics of this type of basin. This synthesis indicates that crustal thinning was influenced by two decoupling horizons: the middle crust and Triassic prerift salt, initially located between the basement and prerift sedimentary cover. These two horizons remained active throughout basin formation and were responsible for depth-dependent thinning of the crust and syn-rift salt tectonics. We therefore identify several successive deformation phases involving (a) pure shear dominated thinning, (b) simple shear dominated thinning and (c) continental breakup. In the first phase, distributed deformation resulted in the development of a symmetric basin. Field observations indicate that the middle and lower crust were under dominantly ductile conditions at this stage. In the second phase, deformation was localised along a crustal detachment rooted between the crust and the mantle and connecting upwards with Triassic prerift salt. During continental breakup, basin shoulders recorded the occurrence of brittle deformation, whereas the hyperextended domain remained under predominantly ductile thinning. The formation of smooth-slope-type extensional basins was intrinsically linked to the combined deposition of thick syn-rift and breakup sequences, and regional salt tectonics. They induced significant burial and allowed the continental crust and the prerift sequence to deform under high temperature conditions from the rifting to continental breakup stages.

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Section: Tartas Basinsupporting

confidence: 52%

Section: Tartas Basinmentioning

confidence: 99%

Section: Tartas Basinmentioning

confidence: 99%

Section: Arzacq Basinmentioning

confidence: 99%

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Review of Iberia–Eurasia plate‐boundary basins: Role of sedimentary burial and salt tectonics during rifting and continental breakup

et al. 2021

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“…The European margin is transported northward over the Arzacq basin on the Sainte-Suzanne thrust ( Figure 3b; Angrand et al, 2018;Daignières et al, 1994;Issautier et al, 2020;Serrano et al, 2006;Teixell, 1998). Both sides involved are composed of a Jurassic to Albian carbonate platform and Upper Cretaceous turbidites.…”

Section: Inverted Rift Domainsmentioning

confidence: 99%

Paleogeothermal Gradients Across an Inverted Hyperextended Rift System: Example of the Mauléon Fossil Rift (Western Pyrenees)

et al. 2020

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The fossil rift in the North Pyrenean Zone, which underwent high temperature-low pressure metamorphism and alkaline magmatism during Early Cretaceous hyperextension, was studied to explore the geothermal regime at the time of rifting. In this work, we combined Raman lab analysis and thermal numerical modelling to shed light on the distribution of geothermal gradients across the inverted hyperextended Mauléon rift basin during Albian and Cenomanian time, its period of active extension. Data were acquired from a set of 155 samples from densely spaced outcrops and boreholes, analyzed using Raman spectroscopy of carbonaceous material. The estimated paleogeothermal gradient is strongly related to the structural position along the Albian-Cenomanian rift, increasing along a proximal-distal margin transect from~34°C/km in the European proximal margin to~37-47°C/km in the two necking zones and 57-60°C/km in the hyperextended domain. This pattern of the paleogeothermal gradient induced a complex interaction between brittle and ductile deformation during crustal extension. A numerical model reproducing the thermal evolution of the North Pyrenees since 120 Ma suggests that mantle heat flow values may have reached 100 mW/m 2 during the rifting event. This model reveals that above the thermal pulse, the temperature gradient varied within a small range of 55 to 62°C/km, as inferred from RSCM peak temperatures. We demonstrate that the style of reactivation during subsequent convergence influenced the thermal structure of the inverted rift system.

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Meso‐Cenozoic Kinematics of Western Europe Applied to the Pyrenean Domain

ANGRAND,

MOUTHEREAU

2024

Evolution of the Pyrenees During the Variscan and Alpine Cycles 1

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Role of structural inheritance and salt tectonics in the formation of pseudosymmetric continental rifts on the european margin of the hyperextended Mauléon basin (Early Cretaceous Arzacq and Tartas Basins)

Cited by 21 publications

References 92 publications

Review of Iberia–Eurasia plate‐boundary basins: Role of sedimentary burial and salt tectonics during rifting and continental breakup

Review of Iberia–Eurasia plate‐boundary basins: Role of sedimentary burial and salt tectonics during rifting and continental breakup

Paleogeothermal Gradients Across an Inverted Hyperextended Rift System: Example of the Mauléon Fossil Rift (Western Pyrenees)

Meso‐Cenozoic Kinematics of Western Europe Applied to the Pyrenean Domain

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