Geological setting and geochemistry of uranium-rich granites in the Proterozoic of Sweden

M. R. Wilson, G. V. Åkerblom
1982 Mineralogical magazine  
Uraniferous granites occur in several different geological settings in the Swedish Precambrian and represent a variety of granite types and ages. Granites with > 10 ppm U are highly differentiated leucocratic alkali granites with initial 87Sr/86Sr ratios over 0.708. They commonly show enrichment in F, Sn, W, and/or Mo, while mineralization of these dements may, in some cases, be found in the nearby country rock. Radiogenic heat from the granites may have assisted hydrothermal circulation. In
more » ... only one case, Hotagen, is important U mineralization thought to be directly related to a U-rich granite, while the majority of epigenetic U mineralizations with economic potential are related to hydrothermal processes in areas where the bedrock is regionally enhanced in U.
doi:10.1180/minmag.1982.046.339.10 fatcat:vaz4rqdohbgw7idjfiguso3r24