Constraints Added by the Strontium and Boron Isotopes on the Geochemical Characterization of the Palmottu Hydrosystem (Finland)

J. Casanova
1998 Mineralogical magazine  
The Palmottu U-ore deposit, located in a granitic host rock in southern Finland, provides an excellent location for analogue studies to assess the radionuclide transport from the U-ore deposit along welldefined pathways in the fractured crystalline rock [ 1 ] . In this context, strontium and boron isotope ratios are used to trace the degree of water-rock interaction and mixing processes in groundwaters. Sr and B analyses have been performed on groundwater from the Palmottu hydrosystem and, in
more » ... drosystem and, in particular, on the deep geochemical boreholes R385 and R386 [1]. This study should contribute to the understanding of recent hydrogeological and hydrogeochemical conditions of the site, including the design of a conceptual groundwater flow model. Collection procedure and sampling site Forty seven water samples have been analysed, including surface waters, springs, groundwaters in the overburden, waters from different former boreholes (packer and tube sampling) and the waters sampled during drilling of the R385 borehole. The chemical analysis of the water samples was performed by inductively coupled plasma mass spectrometry for B, Rb and Sr concentrations and by mass spectrometry for the ~11B and 87Sr/S6Sr ratios.
doi:10.1180/minmag.1998.62a.1.147 fatcat:lgeghrs2knawvkyooys67rm3qq