REACTIVATION OF THE MECINA DETACHMENT IN THE WESTERN SECTOR OF SIERRA-NEVADA (BETIC-CORDILLERAS, SE SPAIN)

In the Internal Zones of the Betic Cordilleras, the Alpujarride Comple x is superposed on the Nevado-Filabride Complex by the Mecina Detachme nt, which is a low-angle normal fault that was active throughout its w hole extension before the Upper Miocene. In western Sierra Nevada, the detachment has been folded and reactivated since the Upper Miocene. A high-angle normal fault system with NW-SE strikes and a general domin o structure is developed in the Alpujarride, but does not cut the deta chment. The sediment geometry of the associated asymmetrical basins co ntributes towards the reconstruction of the fault system.