Articles | Volume 6, issue 2
Research article
08 Jun 2015
Research article |  | 08 Jun 2015

High-temperature metamorphism during extreme thinning of the continental crust: a reappraisal of the North Pyrenean passive paleomargin

C. Clerc, A. Lahfid, P. Monié, Y. Lagabrielle, C. Chopin, M. Poujol, P. Boulvais, J.-C. Ringenbach, E. Masini, and M. de St Blanquat


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Short summary
The northern flank of the Pyrenean belt is an example of an inverted hot passive margin. We provide a data set of more than 100 peak-temperature estimates by RSCM and 18 new radiogenic ages from metamorphic and magmatic rocks from the North Pyrenean Zone. The results indicate a first-order control of the thermal gradient by the intensity of the Cretaceous crustal thinning. The highest grades of metamorphism are associated with the areas where mantle peridotites have been unroofed or exhumed.