Implicaciones de la zona Ossa-Morena y dominios equivalentes en el modelo geodinámico de la Cadena Hercinica europea

Abstract

The Ossa-Morena zone (OMZ) has some peculiar features clearly different from those of the other inner domains in the Iberic Hercynian chain. It is a continental domain (microcontinent ?) attached, from Lower Paleozoic times, to the continental crust of the Central Iberian zone (CIZ). During the Hercynian collision (Upper Paleozoic) the OMZ behaved in a way different form that of adjacent areas (CIZ) due to the peculiar features (Iess thicknees) and pre-Hercynian evolution (Ordovician rifting). The OMZ, and their equivalent domains in the Iberian peninsula as well as in European chain, can have strong implications on the evolution of the Hercynian orogene. Part of the OMZ crust (and equivalent domains), together with the oceanic crust developed within it during the Ordovician rifting, was obduced over the inner domains (CIZ) in areas of frontal collision (e.g. NW Iberian peninsula and French Massif Central) and strongly stretched in areas of oblique collision (e.g. OMZ of SW Iberian peninsula and North Armorican domains).