Role of rift structural inheritance in orogeny highlighted by the Western Pyrenees case-study

Eikonal Tomography Using Coherent Surface Waves Extracted From Ambient Noise by Iterative Matched Filtering—Application to the Large‐N Maupasacq Array

“…Interestingly, this high-velocity region is found on the top of the fast velocity anomaly imaged in Wang et al (2016), which has been interpreted as a mantle body exhumed during the Cretaceous episode of rifting. This would suggest that the top of the basement is at a much shallower depth in the southern part of the Mauleon basin, in good agreement with the geological sections recently published for this area (e.g., Gómez-Romeu et al, 2019;Saspiturry et al, 2019).…”

Preorogenic Folds and Syn‐Orogenic Basement Tilts in an Inverted Hyperextended Margin: The Northern Pyrenees Case Study

“…Previous studies in the Western Pyrenees (Gómez-Romeu et al, 2019;Teixell et al, 2016) have proposed three successive stages during the convergence between the Iberian and Eurasian plates ( Figure 11). The early convergence was first accommodated by the closure of the exhumed mantle domain followed by the overriding of the thinned Iberian margin on top of the European margin, probably starting during Early Eocene times (proto-collision in Figure 11).…”

“…Peak metamorphism predated the onset of the convergence between the Iberian and European plates whose first evidence in the western North Pyrenean Zone dates of Campanian-Maastrichtian (Poitevin et al, 2014;Teixell, 1996). Early shortening in the Pyrenean domain (Late Cretaceous, 83 to 75-70 Ma, Mouthereau et al, 2014) was first accommodated by the closure of the exhumed mantle domain, followed by continental plate underthrusting (Gómez-Romeu et al, 2019;Jammes et al, 2009;Mouthereau et al, 2014;Teixell et al, 2016;Tugend et al, 2014Tugend et al, , 2015. Topography building and foreland flexure were limited during these first convergence stages and could be partly delayed by the presence of a thick salt layer uncoupling the cover from the deep crust and mantle lithosphere (Jourdon et al, 2020).…”

“…Topography building and foreland flexure were limited during these first convergence stages and could be partly delayed by the presence of a thick salt layer uncoupling the cover from the deep crust and mantle lithosphere (Jourdon et al, 2020). The subsequent full collision stage (from 75-70 Ma to the early Miocene in the Central Pyrenees; Mouthereau et al, 2014; from the late to mid-Eocene in the western Pyrenees; Gómez-Romeu et al, 2019;Teixell et al, 2016) was mostly resolved through the southward thrusting of the upper Iberian crust and the subduction of the lower Iberian crust underneath the European plate (Muñoz, 1992;Teixell, 1998;Teixell et al, 2016). Continental collision was associated with important uplift, foreland flexure, and foreland succession deposition (Biteau et al, 2006;Puigdefàbregas, 1975;Teixell et al, 2016, Figure 1b).…”

“…The early convergence was first accommodated by the closure of the exhumed mantle domain followed by the overriding of the thinned Iberian margin on top of the European margin, probably starting during Early Eocene times (proto-collision in Figure 11). During these early stages, the continental crust progressively recovered its original thickness before the continental collision by Late Eocene times (Gómez-Romeu et al, 2019;Teixell et al, 2016). The timing of these convergence stages is partly constrained by low-temperature thermochronology data in the central-western Pyrenees that evidence rapid cooling at 50 Ma in the Mauléon Basin (Vacherat et al, 2014).…”