Uranium isotopic distribution in the mineral phases of granitic fracture fillings by a sequential extraction procedure.
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.
Crespo
M T
MT
CIEMAT, Madrid, Spain.
Pérez del Villar
L
L
Jiménez
A
A
Pelayo
M
M
Quejido
A
A
Sánchez
M
M
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
D008903:Minerals; C007886:granite; D014501:Uranium; D012822:Silicon Dioxide