title: Uranium isotopic distribution in the mineral phases of granitic fracture fillings by a sequential extraction procedure.
abstract: In order to study the recent rock-water interaction processes in the E1 Berrocal site, a sequential leaching method has been applied to granitic fracture fillings to obtain the U isotopic distribution in the mineral phases of these samples. Based on the mineralogical composition of these materials, six dissolution steps have been chosen to extract U as exchangeable cation, from carbonates, amorphous Fe-oxyhydroxides, labile resistates and highly insoluble resistates. In this way, the processes involved in the rock-water interaction phenomena, mainly dissolution, precipitation, coprecipitation and adsorption can be distinguished and even approximately dated.
authors.affiliation: CIEMAT, Madrid, Spain.
authors.forename: M T
authors.initials: MT
authors.lastname: Crespo
authors.forename: L
authors.initials: L
authors.lastname: Pérez del Villar
authors.forename: A
authors.initials: A
authors.lastname: Jiménez
authors.forename: M
authors.initials: M
authors.lastname: Pelayo
authors.forename: A
authors.initials: A
authors.lastname: Quejido
authors.forename: M
authors.initials: M
authors.lastname: Sánchez
mesh_terms: D008855:Microscopy, Electron, Scanning / Q000379:methods; D008872:Microwaves; D008903:Minerals / Q000032:analysis; D012822:Silicon Dioxide / Q000032:analysis*; D013030:Spain; D014501:Uranium / Q000032:analysis*; D014961:X-Ray Diffraction / Q000379:methods
chemical_list: D008903:Minerals; C007886:granite; D014501:Uranium; D012822:Silicon Dioxide