Concentración y fraccionamiento de Tierras Raras en el agua del sistema fluvio-marino del río Tinto (SO de España)
- Rosa Díaz, Jesús de la
- Carro, Berta M.
- López González, Nieves
- Grande Gil, José Antonio
- Lozano Soria, Olivia
- Borrego Flores, José
ISSN: 0213-683X
Year of publication: 2005
Issue: 38
Pages: 151-154
Type: Article
More publications in: Geogaceta
Abstract
The REE concentration in the water of the Tinto river decreases from the fluvial sector (1098.63 ?g·l-1) to the zone of greater marine influence (0.33 ?g·l-1) showing a strong longitudinal gradient in the estuarine mixing zone, where conductivity goes from 10 to 50 mS·cm-1 and pH from 3 to 6. The fluvial sector shows a typical fractionation pattern of acid environments, with a convex morphology centered in the Gd. In agreement we approached the marine sector of the estuary, with conductivities greater than 50 mS·cm-1 and pH bigger than 6, this model evolves towards a fractionation pattern with a clear depletion in LREE that preferably are adsorbed on the particle surfaces.