Late Palaeozoic NE–SW ductile–brittle extension in the La Serre horst,eastern France |
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Authors: | Guilhem Coromina Olivier Fabbri |
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Affiliation: | Équipe d''accueil 2642 « Géosciences : déformation, écoulement, transfert », université de Franche-Comté, 16, route de Gray, 25030 Besançon cedex, France |
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Abstract: | In the La Serre horst of the Alpine foreland, the pre-Triassic La Serre median fault zone separates a Late Devonian–Early Carboniferous granite from an ignimbrite of unknown age and from Permian deposits. Motion along this fault zone took place first in ductile conditions and then evolved in brittle conditions. Both ductile and brittle shear criteria indicate a top-NE normal-dextral displacement. Similar motions are reported along faults bounding Late Palaeozoic intramontane coal basins located in the Massif Central and correspond to a widespread NE–SW Late to Post-Orogenic extension that affected the Variscan basement during Late Carboniferous to Early Permian times. To cite this article: G. Coromina, O. Fabbri, C. R. Geoscience 336 (2004). |
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Keywords: | La Serre horst Alpine foreland Late Carboniferous–Early Permian extension fault mylonite horst de la Serre avant-pays alpin Carbonifère supérieur–Permien inférieur extension faille mylonite |
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