Anomalías gravimétricas y estructura del abanico aluvial de La Zubia (Sierra Nevada occidental, Cordilleras Béticas)

Abstract

La Zubia alluvial fan is located at the boundary between the western slopes of Sierra Nevada and the Granada depression. The Alpujárride rocks of the northwestern flank of Sierra Nevada antiform constitute its metamorphic basement. New gravity data allow to estimate the distribution of the Neogene-Quaternary sedimentary fill thickness. Gravity models indicate that the N-S normal faults of Sierra Nevada border have not large related depocenters and the basement is deeper towards the Granada depression. Faults are more active in the northern sector of the alluvial fan, where is located the NW-SE oriented Granada Fault that northwestwards progressively increases its vertical slip.