Datación magnetoestratigráfica de las evaporitas de la cuenca neógena de Fortuna (Murcia)

Abstract

The magnetostratigraphic study of the Río Chicamo section (240 m) in the Neogene Fortuna Basin (Murcia,

Eastern Betics) has enabled the record of five magnetozones. The possible correlations with the standard geomagnetic polarity time scale (CPTS) imply that the evaporitic succession of the Fortuna Basin was not coeval with the Messinian evaporites of the Sorbas (Almeria, Spain) and Caltanissetta (central Sicily) basins, which were assigned to the reverse chron C3r (Gautier et alv 1994). The marine evaporites of the Fortuna Basin are older (Tortonian-Messinian boundary or early Messinian) than the evaporites of those basins and, therefore, cannot be assigned to the main upper Messinian evaporite event of the Mediterranean region