Secuencias de depósito neógenas del margen noroeste del Mar de Alborán, Cuenca de Málaga

• Autores: C. Díaz Merino, María del Carmen Comas Minondo, Wenceslao Martínez del Olmo
• Localización: Geotemas (Madrid), ISSN 1576-5172, Nº. 5, 2003 (Ejemplar dedicado a: V Congreso del Grupo Español del Terciario (Granada, 23-25 de septiembre, 2003)), págs. 61-65
• Idioma: inglés
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• Resumen

  • Data from exploration and scientific wells combined with abundant 2D seismic profiles and the regional geology reveal that the northwestern Alboran basin has been filled by seven distinguishable depositional sequences since the latest Early Miocene. Predominantly normal faulting, and locally reverse and strike-slip tectonics, besides volcanism and mud diapirism have taken place during basin evolution. The syn-rift sequences consist of Burdigalian sandstones, thick Langhian subcompacted shale and Serravallian alluvial fan/fan-delta material interbedded with extensive volcaniclastic beds. The post-rift sequences reflect minor subsidence and the onset of dominant deep-water sedimentation. Hence, narrow platform systems connect with turbidite deposits during Tortonian and early Messinian times. The intra-Messinian sea-level fall is evidenced by the occurrence of the widespread Messinian heterogenic (with evaporite clasts) turbidite system.

    The Plio-Pleistocene sedimentary record mimics the distal systems of the present fluvial network, with submarine canyons, channels and fans being recognised in the Malaga Bay