Variscan granites of the Pyrenees revisited: their role as syntectonic markers of the orogen

✍ Scribed by G. Gleizes; D. Leblanc; J.L. Bouchez

• Book ID: 104463182
• Publisher: John Wiley and Sons
• Year: 1997
• Tongue: English
• Weight: 195 KB
• Volume: 9
• Category: Article
• ISSN: 0954-4879
• DOI: 10.1046/j.1365-3121.1997.d01-9.x

✦ Synopsis

Structural studies of Variscan plutons of the Pyrenees demonstrate their syn‐orogenic character, contrasting with their post‐orogenic Permian Rb‐Sr datation. The Bassiès and Mont‐Louis‐Andorra plutons were emplaced before the main Variscan D2 phase and behaved as rigid markers during D2. Emplacement of the Néouvielle pluton was coeval with D2 as attested by its behaviour, first as a deformable body, then as a rigid body. The structures in plutons, combined with those of the country rocks, demonstrate that the whole Pyrenees acted as a large dextral ductile shear zone during the D2 main phase. This conclusion points out to the interest of the granitoids as kinematic markers.