Uranium mineralization in the Permian volcanic rocks at Kravany, Kozie Chrbty Mts., Western Carpathians, Slovak Republic: Preliminary results

Rock debris with uranium mineralization were found at the Kravany village. Ore mineralization occurs in quartz-calcite-dolomite gangue located in the altered, fine-grained Permian diorite porphyrite. Mineralization is represented by uraninite, Pb phase (?) and arsenic-rich pyrite, and is accompanied by arsenic-free pyrite, chalcopyrite, tetrahedrite, sphalerite and galena. The origin of the mineralization can be probably explained by infiltration of uranium-bearing solutions from the sedimentary Kravany Member of Permian age to volcanic rocks. (author)