Le probleme structural de la Pinede de Durban-Corbieres, Languedoc (Aude)

Abstract

Abstract The structural complexity of the Pinede massif, between Albas and Durban in southwest France, is due to the superposition of various tectonic phases and paleogeographic events. Partial E-W fractures were formed after the tangential Hercynian tectonics but before the Triassic and a transgressive sequence was deposited during the Triassic on a peneplaned base. This was followed by the deposition of Jurassic and Aptian series. Tectonic events occurred, accompanied by aerial erosion of the sediments between the Aptian and Senonian. Small folds and fractures occurred after the middle Miocene and erosion was contemporaneous with emergence, allowing only a slight relief. After the advance of the eastern Corbieres nappe, the remaining strata were folded toward the northwest and were dragged along as overthrust sheets. Finally, erosion cut away the autochthons and allochthons and the even surface was slightly folded and fractured.