Long-term dynamic topographic support during post-orogenic crustal thinning revealed by stable isotope (δ18O) paleo-altimetry in eastern Pyrenees

Huyghe, Damien; Mouthereau, Frédéric; Ségalen, Loïc; Furió, Marc

doi:10.1038/s41598-020-58903-w

Cited by 30 publications

(44 citation statements)

References 51 publications

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“…In the Pyrenees, in addition to the low temperature thermochronology data already mentioned, post-10 Ma uplift is suggested by geological data (Calvet et al, 2020) including recent paleoelevation estimates (e.g. Huyghe et al, 2020). This uplift is consistent with the reconstruction of the evolution of river profiles suggesting a post-30 Ma incision of the whole of Iberia (Conway-Jones et al, 2019).…”

Section: Geological Setting 21 Tectonic Settingsupporting

confidence: 78%

“…This orogenic sequence is reflected, north of the Ebro Basin, in the syn-orogenic tectonic-stratigraphic relationships well preserved in the South Pyrenean Zone (SPZ), a classical thin-skin fold and thrust belt made of Mesozoic to Cenozoic sediments detached in the Triassic evaporites (Muñoz, 1992;Vergés et al, 1995Vergés et al, , 2002Mouthereau et al, 2014;Carola et al, 2015;Saura et al, 2016). It was followed by a post-orogenic phase of exhumation reported throughout the Pyrenees at about 10 Ma (Morris et al, 1998;Fitzgerald et al, 1999;Whitchurch et al, 2011;Fillon et al, 2013Fillon et al, , 2020Mouthereau et al, 2014;Bosch et al, 2016;Monod et al, 2016;Huyghe et al, 2020; see also the review by Calvet et al, 2020).…”

Section: Geological Setting 21 Tectonic Settingmentioning

confidence: 93%

“…In the absence of significant crustal shortening, the drivers of this post-10 Ma uplift are heavily debated. They include changes related to increasing temperature in the asthenopheric mantle, regional scale mantle flow, lithospheric folding, or magmatic addition in the lithospheric mantle (Cloetingh et al, 2002;Boschi et al, 2010;Faccenna et al, 2014;Conway-Jones et al, 2019;Huyghe et al, 2020).…”

Section: Geological Setting 21 Tectonic Settingmentioning

confidence: 99%

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Late Pliocene-Pleistocene incision in the Ebro Basin (North Spain)

Regard¹,

Vacherat²,

Bonnet³

et al. 2021

BSGF - Earth Sci. Bull.

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The Ebro Basin constitutes the central part of the southern foreland of the Pyrenees. It was endorheic during the Cenozoic and accumulated sediments. By the end of the Miocene, erosion and river incision reconnected the basin to the Mediterranean Sea, establishing a post-opening drainage network. Those rivers left terraces that we study in this work. We first synthesize previous works on river terraces that are widely dispersed in the basin. We provide new age constraints, up to 3 Ma, obtained thanks to cosmogenic nuclides using both profile and burial methods. We derive a unified fluvial terrace chronology and a homogenized map of the highest terraces over the entire Ebro Basin. The dated terraces labeled A, B, C, D, and E are dated to 2.8 ± 0.7 Ma, 1.15 ± 0.15 Ma, 850 ± 70 ka, 650 ± 130 ka, and 400 ± 120 ka, respectively. The chronology proposed here is similar to other sequences of river terraces dated in the Iberian Peninsula, around the Pyrenees, and elsewhere in Europe. The oldest terraces (A, B, C) are extensive, indicating they form a mobile fluvial network while from D to present, the network was stable and entrenched in 100 to 200 m-deep valleys. The transition from mobile to fixed fluvial network is likely to have occurred during the Middle Pleistocene Transition (MPT, between 0.7 and 1.3 Ma), when long-period/high-intensity climate fluctuations were established in Europe. We estimate that between 2.8–1.15 Ma and present, the incision rates have tripled.

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Section: Geological Setting 21 Tectonic Settingsupporting

confidence: 78%

Section: Geological Setting 21 Tectonic Settingmentioning

confidence: 93%

Section: Geological Setting 21 Tectonic Settingmentioning

confidence: 99%

See 1 more Smart Citation

Late Pliocene-Pleistocene incision in the Ebro Basin (North Spain)

Regard¹,

Vacherat²,

Bonnet³

et al. 2021

BSGF - Earth Sci. Bull.

Self Cite

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“…They are supposed to have been variably reactivated during three phases (1) Mesozoic rifting (Debrand-Passard et al, 1984;Berger et al, 1997;Tavani et al, 2018;Angrand et al, 2020;Arthaud & Laurent, 1995); (2) Pyrenean orogenesis (Late Santonian -Early Miocene) (Arthaud et Durand;Barnolas et al, 2001;Lacombe & Jolivet, 2005) and (3) Oligo-Miocene extension, where most of the transfer zone formed the north-western margin of the Liguro-Provençal back-arc basin (Gulf of Lion passive margin, Fig. 1) (Gorini et al, 1991(Gorini et al, , 1993Viallard & Gorini, 1994;Guennoc et al, 2000;Mascle et al, 1996;Séranne, 1999;Gattacceca et al, 2007;Mauffret et al, 2001;Bache et al, 2010et Jolivet et al, 2015Huyghe et al, 2020). During the different tectonic phases, the reactivation of these inherited faults appear to have strongly influenced the orientation of structures in the overlying sedimentary cover, producing structures of various nature and ages (e.g.…”

Section: Ne-sw Cévennes Basement Cutting Faultsmentioning

confidence: 99%

Evidence of decoupled deformation during Jurassic rifting and Cenozoic inversion phases in the salt-rich Corbières-Languedoc Transfer Zone (Pyreneo-Provençal orogen, France)

Crémades¹,

Ford²,

Charreau³

2021

BSGF - Earth Sci. Bull.

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A detailed field study of Jurassic tectono-stratigraphic architecture of the southwestern part of the Corbières-Languedoc Transfer Zone (CTZT) in the French Pyrenees demonstrates for the first time 3D variations in thickness and stratigraphic geometries on near-orthogonal syn-sedimentary structures linked to Jurassic extension with salt. Some of these structures were previously interpreted as compressional and Pyrenean in origin (Late Santonian-Eocene). Our study instead shows that these are extensional salt- related structures that were reactivated during Pyrenean compression and again during Oligo-Miocene extension. We propose that the structures evolved through a strong interaction between inherited crustal structures of the same orientation, and salt tectonics. Strong segmentation of the CLTZ supra-salt cover by oblique structures, is inherited from Jurassic and is linked to interaction between basement EW structures of the Pyrenean rift domain and NE-SW structures of the European Tethyan margin. We distinguish NE-SW trending stuctures (Cévenoles) as extensional forced folds and NE-SW trending salt ridges that developed above basement cutting faults NE-SW oriented. Salt ridges delimited the future NE-SW trending orogenic domains (retro-foreland, Frontal, Main Nappe). N110 trending Pyrenean structures are represented by the Treilles Fault, a major syn sedimentary fault that roots into Keuper evaporites. This study shows that the Corbières is a key area to better understand Pyreneo-provençal evolution along its whole Wilson cycle (rift to rift) and to better understand the processes that govern the formation of a salt-rich rift transfer zone in a strongly pre-structured crust, its positive inversion and the role of salt tectonics in different deformation phases.

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“…The driving mechanisms of these events are still debated. Driving forces of this erosion may be associated with the opening of the Gulf of Lion that creates a base level drop but also potential uplift (Huyghe et al., 2020). Huyghe et al.…”

Section: Discussionmentioning

confidence: 99%

Thermal record of the building of an orogen in the retro‐foreland basin: Insight from basement and detrital thermochronology in the eastern Pyrenees and the north Pyrenean basin (France)

et al. 2021

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An understanding of the evolution of foreland basins improves our knowledge of how mountain belts have grown and helps us to decipher events which may not be preserved in the orogen. The infilling of the north Pyrenean retro‐foreland basin (Aquitaine Basin, France) during the main exhumation of the Pyrenees and its corresponding thermal history have not been fully investigated. We applied apatite fission track (AFT) and (U‐Th‐Sm)/He (AHe) methods coupled with inverse thermal modelling on both the detrital Eocene (47 to 33 Ma) syn‐orogenic Palassou conglomerates of the eastern part of the Aquitaine Basin and basement samples from the North Pyrenean Zone and the Axial Zone of the Pyrenees. Apatite crystals were separated from granitic cobbles found in the conglomerates. AFT ages for detrital samples range from 27 ± 2 to 43 ± 4 Ma, and AHe ages from 13 ± 1 to 76 ± 5 Ma. For in situ massifs AFT ages range from 35 ± 2 to 90 ± 17 Ma and AHe ages from 39 ± 2 and 80 ± 5 Ma. AFT ages for detrital samples are close to deposition ages, whereas AHe ages are older and younger than deposition ages and show a partial thermal resetting due to burial. A detailed analysis of the ages obtained and thermal histories derived from modelling shows that ages reflect (a) exhumation from 70 to 55 Ma revealed by a long stay in the partial retention zone (PRZ), (b) a Palaeocene–Eocene cooling in the Pyrenees, (c) a post‐depositional episode of moderate heating of the sediments in the basin represented by partially reset young AHe and AFT ages compared to deposition ages and (d) an early to mid‐Miocene final exhumation of the basin deposits as evidenced by young AHe ages and geological constrains. These results reflect a common event with the south Pyrenean foreland basin that is characterized by high piedmont aggradation from the late Eocene to the Miocene. The aggradation of sediments is possibly connected with well‐known high elevation low relief surfaces in the core of the Pyrenees and followed by a Miocene exhumation event that is already observed on the southern flank. However, the timing of the aggradation and exhumation events could be different between the north and the south. Erosion occurred most probably during the early to mid‐Miocene in the north and during the late Miocene–early Pliocene in the south.

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Long-term dynamic topographic support during post-orogenic crustal thinning revealed by stable isotope (δ18O) paleo-altimetry in eastern Pyrenees

Cited by 30 publications

References 51 publications

Late Pliocene-Pleistocene incision in the Ebro Basin (North Spain)

Late Pliocene-Pleistocene incision in the Ebro Basin (North Spain)

Evidence of decoupled deformation during Jurassic rifting and Cenozoic inversion phases in the salt-rich Corbières-Languedoc Transfer Zone (Pyreneo-Provençal orogen, France)

Thermal record of the building of an orogen in the retro‐foreland basin: Insight from basement and detrital thermochronology in the eastern Pyrenees and the north Pyrenean basin (France)

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