Subsurface structures along western Yucatan from integrated geophysical analysis

Integration of seismic, gravity and magnetic data revealed variations in crustal architecture along the Yucatan passive continental margin. The crust beneath salt basin is ~10 km thick primarily a lower crust. In contrast, Campeche thicker comprises both upper layers. These explain strikingly different tectonic histories these basins outlined by previous authors. rifting margin was associated with extensive magmatism expressed as voluminous igneous intrusions crust, one which manifested anomaly. zone extrusive volcanic flows also interpreted northern coincident Seaward Dipping Reflectors (SDR) seismic data. Integrated analysis potential fields demands high density susceptibility for rocks SDR zone. pre-salt sedimentary up to 5 sediments overlies stretched intruded adjacent Ocean-Continent boundary (OCB). This 100 wide pinches out at northeastern tip peninsula. It appears be compartmentalized width individual segments km. All elements, namely OCB, SDR, basin, magmatic within have their counterparts Gulf Mexico therefore represent important constraints pre-breakup locations blocks.