MULTICHANNEL SEISMIC IMAGE OF THE CRUSTAL THINNING AT THE NE IBERIAN MARGIN COMBINING NORMAL AND WIDE-ANGLE REFLECTION DATA

The seismic image of the Moho at the transition from the NE Iberian Peninsula to the Western Mediterranean Sea is investigated using coincident steep and wide-angle reflection data merged into a single stacked and migrated section. The multichannel analysis of onshore/offshore large-aperture data provides new insight on the deep structure in areas where the steep sections lack penetration, and reveals that the crust undergoes a strong but continuous thinning along the flanks of the Valencia trough. The combined seismic image indicates that almost half of the continental crust (14-15 km) is lost in less than 60 km horizontal distance.