Onset of Iberian-European plate convergence: Late Cretaceous flexural response of a hot lithosphere (Aquitaine Basin, France)

Issautier, Benoît; Lasseur, Éric; Saspiturry, Nicolas; Ambert, Paul; Andrieu, Simon; Serrano, Olivier

doi:10.1016/j.tecto.2022.229504

Cited by 6 publications

(3 citation statements)

References 126 publications

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“…11) after the extension of the Late Jurassic and Early Cretaceous. Thus, compressive tectonics related to the Campanian Iberia-Eurasia convergence (Issautier et al, 2022;Mouthereau et al, 2014;Roure et al, 1989;Vergès et al, 1995Vergès et al, , 2002 is observed during the Late Cretaceous up to 400 km north of the Pyrenean belt.…”

Section: Pyrenean Compressionmentioning

confidence: 98%

“…During the Late Cretaceous (pre-Santonian), the extension observed in the Aquitaine Basin foreland is associated with mantle exhumation leading to high geothermal gradients (e.g., Angrand et al, 2018;Clerc et al, 2012;Issautier et al, 2022;Lagabrielle and Bodinier, 2008;Lagabrielle et al, 2010). This thermal influence does not affect the northern Aquitaine Basin.…”

Section: Pyrenean Compressionmentioning

confidence: 99%

“…In the Aquitaine Basin, deformation is concentrated on a limited area between the Celtaquitaine flexure in the north and the North Pyrenean Fault in the south (Fig. 1; BRGM and Esso-Rep, 1974;Jammes et al, 2009;Issautier et al, 2022;Tugend et al, 2014) suggesting that no diffuse extension is recorded. However, it has also been proposed that the early deformations were not focused and extended north of the Celtaquitaine flexure (Asti et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

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Early, far-field and diffuse tectonics records in the North Aquitaine Basin (France)

Bouat,

Strzerzynski,

Mourgues

et al. 2023

BSGF - Earth Sci. Bull.

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During the Mesozoic and the Cenozoic periods, Europe recorded several tectonic events that have been interpreted as far-field tectonics. This may be diffuse tectonics that occur at the onset of a major tectonic event or propagation of the deformation away from orogenic fronts. In Western Europe, the deformations related to the opening of the Bay of Biscay and the formation of the Pyrenean belt are well described in the southern part of the Aquitaine basin, but little is known about the “Northern Aquitaine Platform”. We combine field observation with Unmanned Aerial Vehicle (UAV) imagery and U-Pb laser dating on calcite to determine the tectonic evolution in the Vendée Coastal domain. Our results highlight the occurrence of two main tectonic events since the early Jurassic: (1) At the transition from the Late Jurassic to Early Cretaceous, WNW-ESE striking normal faults exhibit a horst and graben pattern that emplaced at the onset of the opening of the Bay of Biscay. Their association with reactivated Variscan strike-slip faults is consistent with oblique extension processes. Such a tectonic event was accompanied by fluid flow coming from depth. (2) During the Late Cretaceous, fractures, wide-open folds, veins, and joints are consistent with the N-S shortening direction that occurs during the earliest stages of the N-S Pyrenenan compression. In both cases, the early stages of the main regional deformation stages are recorded in the “Northern Aquitaine Platform” in a far-field position and before the focus of strain in rifts or orogenic belts. In the Aquitaine basin as in many other places in Europe, the tectonic study of sedimentary platforms located far from the main plate-scale deformation zone provides new constraints on the early diffuse deformation process that predate the main tectonic phases.

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Section: Pyrenean Compressionmentioning

confidence: 98%