Resumen de Caracterización geoquímica de las capas ricas en materia orgánica registradas durante el estadio isotópico marino 7 en el Mar de Alborán (Mediterráneo occidental)
B. González Mora, Francisco Javier Sierro Sánchez
Samples from the Alboran Sea (Western Mediterranean) were studied in order to characterise the organic rich layers recorded during marine isotope stage 7 from a geochemical point of view. X ray fluorescence measurements were carried out at a 1cm-resolution and variations in terrigenous and biogenic elements were observed during the whole studied interval (245-190 kyr), suggesting more carbonate production during warmer periods, and more arrival of terrigenous material during lower-sea level substages. Organic rich layers were characterized by high biogenic barium and low Si/Al, which can be interpreted as increasing surface productivity or better preservation of the organic material, and more river discharge due to more abundant precipitations.
