The crustal evolution of the west-central Pyrenees revisited : inferences from a new kinematic scenario
Teixell Cácharo, Antonio (Universitat Autònoma de Barcelona. Departament de Geologia)
Labaume, Pierre (Université de Montpellier. Géosciences Montpellier)
Lagabrielle, Yves (Université Rennes 1. Géosciences Rennes)

Fecha:	2016
Resumen:	New evolutionary models for the Pyrenean orogeny mustconsider feedbacks between the Mid-Cretaceous hyperextension postulated recently and the Pyrenean inversion. We present a new crustal section of the Pyrenees through the Jaca Basin, the western Axial Zone and the Chainons Bearnais, which allows identifying the ancient continental margins of the Iberian and European plates and a suture. A sequential restoration allows a reassessment of the style of convergence through time. Restoration leads to a progressively thinned crust in narrow continental margins separated by a domain of exhumed mantle peridotite and overlain by a detached sedimentary lid. Early convergence during the Late Cretaceous and the Earliest Paleogene was accommodated by subduction of the peridotite domain. This was followed in the Eocene by initial collision involving overriding of the Iberian margin onto the European margin along the deep ramp of the North-Pyrenean Frontal thrust, which defines the suture. Subsequent full collision and strong relief generation from the late-Mid or Late Eocene to the Early Miocene were associated with thrust accretion of the Iberian plate, underlain by wedging and northward subduction of the decoupled Iberian lower crust.
Ayudas:	Ministerio de Economía y Competitividad CGL2010/15416 Ministerio de Economía y Competitividad CGL2014/54180-P
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial i la comunicació pública de l'obra, sempre que no sigui amb finalitats comercials, i sempre que es reconegui l'autoria de l'obra original. No es permet la creació d'obres derivades.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió acceptada per publicar
Materia:	Crustal structure ; Hyperextension ; Continental margins ; Tectonic inversion ; Pyreees
Publicado en:	Comptes rendus geoscience, Vol. 348, Issues 3-4 (March-April 2016) , p. 257-267, ISSN 1631-0713

DOI: 10.1016/j.crte.2015.10.010

Post-print 21 p, 1.3 MB

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