MODELS OF MAGNETIC AND BOUGUER GRAVITY-ANOMALIES FOR THE DEEP-STRUCTURE OF THE CENTRAL ALBORAN SEA BASIN

Magnetic and gravimetric data from the central Alboran Sea allow ident ification of two axes of crustal thinning, which were probably active during the Oligocene-Early Miocene. The western Alboran basin ar;is is subparallel and may be related in origin to the Gibraltar Are. The EN E-WSW trending Alboran Channel axis is probably intruded by basic igne ous rocks and may represent the western end of the Algerian-Balearic b asin rift. Present-day small areas with high heat flow may well be rel ated to volcanism and an anomalous mantle. Areas of active deformation in the Alboran Sea accommodate the present Eurasia-Africa convergence .