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Title: Registro de la variabilidad climática de escala milenaria durante el último cliclo glaciar en los sedimentos de la cuenca Argelo-Balear
Author: Frigola Ferrer, Jaime I.
Moreno Caballud, Ana
Canals Artigas, Miquel
Cacho Lascorz, Isabel
Colmenero, E.
Sierro Sánchez, Francisco Javier
Flores, J.A.
Keywords: Paleoclimatologia
Sediments glacials
Issue Date: 2004
Publisher: Sociedad Geológica de España
Abstract: bulk element composition and grain-size distribution to characterize the temporal evolution of the terrigenous input to this area throughout the last 50 ka. The high-resolution elementary profiles show high frequency oscillations, particularly of Si, Ti and K contents, associated with terrigenous input variability. These fluctuations mark significant changes in the source areas and/or in the nature of transport and sedimentation processes most likely related to abrupt changes in oceanographic and atmospheric conditions. The Menorca core records were compared with the geochemical results of a previously studied core from the Alboran Sea, from where it became obvious a similar behaviour in some of the terrigeneous elements at both core locations. The obtained records vary with a clear Dansgaard-Oeschger periodicity reaching higher values during the North Atlantic's Heinrich Events. These results evidence the presence of a millennial-scale synchronous pattern in the Western Mediterranean in terms of deposition of terrigenous material. In addition, grain-size analyses of Menorca core reveal rhythmic episodes of coarser particle inputs during the Holocene likely related to shifts in the intensity of deep-water currents.
Note: Reproducció del document publicat a:
It is part of: Geo-Temas, 2004, vol. 6, num. 5, p. 97-100
ISSN: 1576-5172
Appears in Collections:Articles publicats en revistes (Dinàmica de la Terra i l'Oceà)

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