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Title

End-member modelling to recognize sediment sources in contourites: a case study in the Alboran Sea

Other TitlesModelización de los end-members para reconocer fuentes de aporte sedimentario en contornitas: un caso de estudio en el Mar de Alborán
AuthorsLópez-González, Nieves; Alonso, Belén ; Casas, David ; Vázquez, J. T.; Palomino, Desirée; Ercilla, Gemma ; Juan, Carmen ; García, Marga ; Estrada, Ferran
KeywordsEnd-member modelling
Contourites
Sediment source
Geochemistry
Alboran Sea
Issue Date2015
PublisherCentro Oceanográfico de Málaga
CitationVolumen de comunicaciones presentadas en el VIII Simposio sobre el Margen Ibérico Atlántico: 571-574 (2015)
AbstractContourite drifts are one the main morphosedimentary features in the Alboran Sea and their sediments are important archives of the past oceanographic conditions and sedimentary processes. The end-member modelling approach lets to decompose multimodal grain-size distribution into genetically meaningful subpopulation that may be related to different sediment transport mechanisms and source areas. Three end-members have been identified in the contourite drift and moat system located at the southern side of the Dijbouti Ville seamount that have been interpreted in terms of sediment sources. Two end-members point to an eolian source and comprise fine silt (EM1) and coarse silt (EM2) as modal grain-sizes, characterized by high and low contents, respectively, of terrigenous elements (Al, Si, Ti and K). The third end-member (EM3) indicates a fluvial origin and is mainly defined by a clay modal grain-size of intermediate and homogeneous content in terrigenous elements. Downcore variation of the relative proportion of these EMs can be used to decipher paleocenographic and paleoclimatic conditions in the Alboran Sea
DescriptionVIII Simposio sobre el Margen Ibérico Atlántico (MIA15), del 21 al 23 de septiembre de 2015, Málaga.-- 4 pages, 4 figures
URIhttp://hdl.handle.net/10261/131376
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