Fast exhumation rate during late orogenic extension: The new timing of the Pilat detachment fault (French Massif Central, Variscan belt)

Gardien, Véronique; Martelat, Jean-Emmanuel; Leloup, Philippe‐Hervé; Mahéo, Gweltaz; Bevillard, Benoit; Allemand, Pascal; Monié, Patrick; Paquette, Jean‐Louis; Grosjean, Anne-Sabine; Faure, Michel; Chelle-Michou, Cyril; Fellah, Clémentine

doi:10.1016/j.gr.2021.10.007

Cited by 10 publications

(6 citation statements)

References 69 publications

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“…Some of the normal faults may be connected to deep detachments located in the pre-Stephanian basement, giving them a listric geometry at the time of the deposition (Figure 9). In fact, upper crustal extensional detachments in the footwall of LOCPB are a common structural feature around the Massif Central [Echtler and Malavieille, 1990, Burg et al, 1994, Faure, 1995, Gardien et al, 2022, and such detachments have been described close to the study area in the Autun and La Serre regions 150 km east of the Brécy depocenter [Choulet et al, 2012].…”

Section: Syn-rift Stagementioning

confidence: 90%

“…The late Carboniferous-Permian is a period of largescale geodynamic reorganization, (i) with the final accretion of Pangea (Variscides/Mauretanides/ Alleghenides orogeneses) and the beginning of its breakup (NeoTethys opening) [e.g., Domeier and Torsvik, 2014, Scotese and Langford, 1995, Stampfli et al, 2013, coeval with (ii) the acme of the Late Paleozoic Ice Age (LPIA), constituting a turning point in From the end of the Carboniferous onwards, the over-thickened and hot Variscan crust collapsed [late-orogenic collapse; Burg et al, 1994, Faure, 1995, Ménard and Molnar, 1988, Van Den Driessche and Brun, 1992, triggering the rise of high-grade metamorphic domes along low-angle detachment faults, and the development of half-graben or pull-apart multi-directional intramountain coal basins [Costa and Rey, 1995, Gardien et al, 2022, Malavieille, 1993 164 Laurent Beccaletto and Sylvie Bourquin 2008a,b, Ménard and Molnar, 1988, Van Den Driessche and Brun, 1989.…”

Section: Introductionmentioning

confidence: 99%

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The Brécy depocenter as part of a new northern Massif Central Carboniferous–Permian Basin (France)

Beccaletto,

Bourquin

2024

Comptes Rendus. Géoscience

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The reinterpretation of deep wells and the reprocessing and interpretation of 115 km of industrial seismic lines can be used to update the geometry, depositional environments and tectonic evolution of the Carboniferous-Permian Brécy depocenter (southwest Paris Basin). The presentday geometry of the Brécy depocenter is controlled by several eastward dipping normal faults, some of which possibly connected to deep detachments that were active during the late Carboniferous-Permian history. It is estimated that the maximum thickness of the Brécy depocenter is 3900 m. The filling provides evidence for a thick late Carboniferous-lower Permian syn-rift stage overlain by a thin post-rift stage, probably similar to the tectonic evolution of the northeastward basins in the Lorraine region of France and Germany and thus attributed to the lower-middle Permian. The facies generally characterize lake environments, with occurrences of sediment supply attributed to fluvial, alluvial fan and delta fan deposits. They mainly display a retrogradational-progradational pattern during the synrift stage, and a retrogradational pattern during the post-rift stage. The Brécy area was part of a larger late Variscan basin during the latest Carboniferous-early Permian times in the northern Massif Central region.

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Section: Syn-rift Stagementioning

confidence: 90%

Section: Introductionmentioning

confidence: 99%

The Brécy depocenter as part of a new northern Massif Central Carboniferous–Permian Basin (France)

Beccaletto,

Bourquin

2024

Comptes Rendus. Géoscience

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“…70 °C/km, associated with postthickening intracontinental extension. The latter results from collapse of the orogenic crust that also led to the formation of intramontane basins [Faure, 1995, Faure et al, 2009, Gardien et al, 2022. These high-temperature conditions developed during pressure decrease (i.e.…”

Section: Continental Collision Zones With Late-orogenic Collapsementioning

confidence: 99%

Metamorphism and linked deformation in understanding tectonic processes at varied scales

Lardeaux¹

2024

Comptes Rendus. Géoscience

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This contribution presents a review exploring some aspects and issues surrounding the links between metamorphism and deformation at different scales. I first discuss the quantification methods of thermodynamics and the parameters able to overcome the kinetic barriers for metamorphic reactions. On the basis of some world's type iconic examples I discuss how metamorphism is likely to portray the thermo-mechanical evolution of lithosphere active zones, thus large-scale tectonic processes. Finally, I present the multiple interactions between metamorphism and deformation at rock and outcrop scales.

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“…collapse (e.g., Gardien et al, 2021). These ductile structures are crosscut by recent subvertical joints and faults.…”

Section: Validating the Pyc Compass Accuracy In The Fieldmentioning

confidence: 99%

Print Your Compass: Using 3D Printed Geological Compasses for Teaching and Research Purposes

Triantafyllou¹

2022

GSAT

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Fast exhumation rate during late orogenic extension: The new timing of the Pilat detachment fault (French Massif Central, Variscan belt)

Cited by 10 publications

References 69 publications

The Brécy depocenter as part of a new northern Massif Central Carboniferous–Permian Basin (France)

The Brécy depocenter as part of a new northern Massif Central Carboniferous–Permian Basin (France)

Metamorphism and linked deformation in understanding tectonic processes at varied scales

Print Your Compass: Using 3D Printed Geological Compasses for Teaching and Research Purposes

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