Estudio de las concentraciones de REE y patrones de fraccionamiento en sedimentos superficiales del estuario de los ríos Tinto y Odiel (SO de España)

Abstract

Sc, Y, Th, Cu and rare earth elements (REE) concentrations have been analyzed in 14 samples of surface sediments by means of ICP-MS. Mean concentrations of Sc, Y and Th in these sediments are lower than those presents in the Upper Continental Crust (UCC). Cu concentration is very high and is caused by inputs from the Odiel and Tinto rivers, affected by acid mine drainage. åREE mean concentration is lower than that observed in other rivers and estuaries. Plots of North American Shale Composite (NASC)-normalized REE data of surface sediments show a slight depletion in REE concentrations. Most samples present with middle REE enrichment relative to light REE and heavy REE