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Rare Earth Elements: A Tool for Understanding the Behaviour of Trivalent Actinides in the Geosphere

  • Belen Buil (a1), Paloma Gómez (a2), Antonio Garralón (a3) and M. Jesús Turrero (a4)

Abstract

REE concentrations have been determined in groundwaters, granite and fracture fillings in a restored uranium mine.

The granitoids normalized REE patterns of groundwaters show HREE-enrichment and positive Eu anomalies. This suggests that the REE are fractionated during leaching from the source rocks by groundwaters. Preferential leaching of HREE would be consistent with the greater stability of their aqueous complexes compared to those of the LREE, together with the dissolution of certain fracture filling minerals, dissolution/alteration of phyllosilicates and colloidal transport.

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1. Johannesson, K. H., Stetzenbach, K. J. and Hodge, V. F., Geochem. Cosmochim. Acta 61, 36053618 (1997).
2. Gruau, G., Dia, A., Olivié-Lauquet, G., Davranche, M. and Pinay, G., Water Res. 38, 35763586 (2004).
3. Buil, B., in Estudio comparativo del comportamiento geoquímico de las tierras raras en los procesos de interacción agua-roca desarrollados en sistemas geotermales del Pirineo Central (Lérida) y en el sistema geológico del entorno de mina Ratones (Cáceres), edited by CIEMAT (Editorial CIEMAT, Spain, 2004), p. 423.
4. Wood, S. A., Chem. Geol. 82, 159186 (1990).

Keywords

Rare Earth Elements: A Tool for Understanding the Behaviour of Trivalent Actinides in the Geosphere

  • Belen Buil (a1), Paloma Gómez (a2), Antonio Garralón (a3) and M. Jesús Turrero (a4)

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