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Nicolas SASPITURRY

Évolution sédimentaire, structurale et thermique d’un rift hyper-aminci : de l’héritage post-hercynien à l’inversion alpine : exemple du bassin de Mauléon (Pyrénées)

Supervisor:
Philippe Razin, Université Bordeaux III

External site: https://sites.google.com/view/nicolas-saspiturry

Major Results

The review of the hyperextended Iberian-Eurasian plate boundary basins shows that they strongly differ from classical Atlantic-type passive margins. Three main stages of continental crust thinning can be inferred to describe the evolution of this smooth-slope type extensional basin : (1) a dominant ductile thinning of the lower crust, without significant brittle deformation of the upper crust, resulting in the formation of a symmetric sag basin; (2) basinward gliding of the prerift cover along the Late Triassic evaporites; (3) hyper-extension with brittle deformation on the proximal margins and dominant ductile thinning on the hyperextended rift domain (HT/LP metamorphism).

Abstract

The western Pyrenean Mauléon basin allows to discuss the tectono-sedimentary and thermal evolution of a hyperextended rift through an entire Wilson cycle. During Permian time, the western Pyrenees record the shift between N-S convergence recorded in the Pyrenean Axial Zone (310 to 290 Ma) and dominant E-W extension (290 to 275 Ma). The preservation of the original Permian-Triassic paleogeography and structure in the « Basque Massif » indicates that there was no major east-west Mesozoic strike-slip motion between the Iberian and European plates in this part of the Pyrenees, questioning the mechanisms responsible for the opening of the Early Cretaceous North-Pyrenean rift system. The Cretaceous Mauléon hyperextended rift basin was inverted during the Alpine orogeny. Reactivation of the former rift structures leads to the formation of a lithospheric scale pop-up whose edges are characterized by differing tectonic reactivation style, localized (Iberia) vs distributed (Europe).

The previously exhumed mantle acts as a buttress inhibiting the complete closure of the basin. In 3D, the N120° thrusts systems edging the pop-up are composed of different thrust segments branching into the inherited Permian N20° transfer zones, highlighting the non-cylindrical geometry of the Pyrenean structures. Permian and Cretaceous structural inheritance both control the synrift and post-collisional thermal evolution of the Mauléon basin. Synrift paleogeothermal gradients gradually increased from the margins (~ 34°C/km) to the basin (~ 60°C/km). Maximum peak temperatures are both controlled by sedimentary burial and mantle heat flow (100 mW.m-2). The different post-collisional thermal responses of the Mauléon basin pop-up edges is linked to their tectonic reactivation style. On the European margin, the postrift isotherms were passively transported onto the proximal margin (« thin-skinned »). On the Iberian margin, peak temperatures were acquired after thrusting (« thick-skinned »).

FIGURE 3
Crustal-scale balanced cross-section (a), its palinspastic restoration to Santonian time (c) and an intermediate Late Eocene step (b). Thrust faults: SM—Sierras Marginalès; Gu—Guarga; Ga.2—Gavarnie.2; Ga.1—Gavarnie.1; Lak—Lakhoura; SA—South Arbailles; NA—North Arbailles; St-P—Saint-Palais; Bel—Bellevue; St-S—Sainte-Suzanne. Structural units: E.1—European crustal unit 1; E.2—European crustal unit 2; GR—Grand Rieu.

Review of Iberia-Eurasia plate-boundary basins: Role of sedimentary burial on depth-dependent continental crust ductile thinning during rifting and continental breakup.

N. Saspiturry, B. Issautier, P. Razin, T. Baudin, R. Asti, Y. Lagabrielle, C. Allanic, O. Serrano, (2021), Review of Iberia-Eurasia plate-boundary basins: Role of sedimentary burial on depth-dependent continental crust ductile thinning during rifting and continental breakup. Basin Research.

keywords: Iberian-European boundary; Sedimentary burial; Salt tectonics; Depth-dependent thinning; Ductile regime; HT/LP metamorphism

DOI: https://doi.org/10.1111/bre.12529

A review of Cretaceous smooth-slopes-extensional basins along the Iberia-Eurasia plate boundary: how prerift salt controls the modes of continental rifting and mantle exhumation.

Y. Lagabrielle, R. Asti, T. Duretz, C. Clerc, S. Fourcade, A. Teixell, P. Labaume, B. Corre, N. Saspiturry, (2020), A review of Cretaceous smooth-slopes-extensional basins along the Iberia-Eurasia plate boundary: how prerift salt controls the modes of continental rifting and mantle exhumation. Earth Science Review.

keywords: Smooth-slopes basins; symmetrical profile; Iberia; Eurasia; Triassic evaporites; décollement layer; thermal anomaly; sedimentary burial; dominating-ductile tectonic regime

DOI: https://doi.org/10.1016/j.earscirev.2019.103071

Large-scale vertical movements in Cenomanian to Santonian carbonate platform in Iberia: Markers of Coniacian initiation of Pyrenean convergence?

Andrieu, S., Saspiturry, N., Lartiguau, M., Issautier, B., Angrand, P., lasseur, E. (2020): Large-scale vertical movements in Cenomanian to Santonian carbonate plateform in Iberia: Markers of Coniacian initiation of Pyrenean convergence?. BSGF OROGEN Sp. Issue.

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, B., Saspiturry N., & Serrano, O. (2020). 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). Marine and Petroleum Geology, 104395. https://doi.org/10.1016/j.marpetgeo.2020.104395

keywords: Rifting, Symmetric basin, Salt tectonic, Inheritance, Early cretaceous, Southwest France

DOI: https://doi.org/10.1016/j.marpetgeo.2020.104395

Closure of a hyperextended system in an orogenic lithospheric pop‐up, Western Pyrenees: The role of mantle buttressing and rift structural inheritance

Saspiturry, N., Allanic, C., Razin, P., Issautier, B., Baudin, T., Lasseur, E., … & Leleu, S. (2020). Closure of a hyperextended system in an orogenic lithospheric pop‐up, Western Pyrenees: The role of mantle buttressing and rift structural inheritance. Terra Nova.

keywords: Mauléon, inheritance, inversion, mantle, pop-up, Cretaceous, Labourd anomaly

DOI: https://doi.org/10.1111/ter.12457

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

Saspiturry, N., Lahfid, A., Baudin, T., Guillou‐Frottier, L., Razin, P., Issautier, B., … & Corre, B. (2020). Paleogeothermal Gradients across an Inverted Hyperextended Rift System: Example of the Mauléon Fossil Rift (Western Pyrenees). Tectonics, 39(10).

keywords: paleogeothermal gradients, RSCM thermometry, hyperextended rift, thermal history, Mauléon basin, Pyrenees

DOI: https://doi.org/10.1029/2020TC006206

PhD Thesis: Évolution sédimentaire, structurale et thermique d’un rift hyper-aminci : de l’héritage post-hercynien à l’inversion alpine : exemple du bassin de Mauléon (Pyrénées)

Nicolas Saspiturry. Évolution sédimentaire, structurale et thermique d’un rift hyper-aminci : de l’héritage post-hercynien à l’inversion alpine : exemple du bassin de Mauléon (Pyrénées). Sciences de la Terre. Université Michel de Montaigne – Bordeaux III, 2019. Français. ⟨NNT : 2019BOR30040⟩. ⟨tel-02860515⟩

keywords: Pyrénées, Bassin de Mauléon, Géodynamique, Héritage post-hercynien, Hyper-extension crétacée, Inversion alpine, Zones de transfert, Métamorphisme HT/BP, Évolution thermique

DOI: https://tel.archives-ouvertes.fr/tel-02860515/document

Tectono-sedimentary evolution of a rift system controlled by Permian postorogenic extension and metamorphic core complex formation (Bidarray Basin and Ursuya dome, Western Pyrenees)

Saspiturry, N., Cochelin, B., Razina, P., Leleu, S., Lemirre, B., Bouscarya, C. Issautier, B., Serrano, O., Lasseur, E., Baudin, T., Allanic, C. (2019).Tectono-sedimentary evolution of a rift system controlled by Permian post-orogenic extension and metamorphic core complex formation (Bidarray Basin and Ursuya dome, Western Pyrenees). Tectonophysics, Elsevier, 2019, 768, pp.228180.

keywords: Post-orogenic rift, Permian, Metamorphic core complex, Detachment, Granulites, Continental deposits

DOI: https://doi.org/10.1016/j.tecto.2019.228180

Symmetry vs. asymmetry of a hyper-thinned rift: Example of the Mauléon Basin (Western Pyrenees, France)

Saspiturry, N., Razin, P., Baudin, T., Serrano, O., Issautier, B., Lasseur, E., Allanic, C., Thinon, I. & Leleu, S. (2019) Symmetry vs. asymmetry of a hyper-thinned rift: Example of the Mauleon Basin (Western Pyrenees, France). Marine and Petroleum Geology, Elsevier, 2019, 104, pp.86-105.

keywords: Continental Margins, Stratigraphic Architecture, Hyper-Extended Rift, Pyrenees, Detachment Faulting, Mauleon Basin, Early Cretaceous

DOI: https://doi.org/10.1016/j.marpetgeo.2019.03.031