and genetical features

Abstract. The Late Cretaceous Elshitsa and Radka epithermal Cu-Au deposits, located in the southern part of the Panagyurishte district, Bulgaria, are closely related to porphyry-copper deposits and were formed by high-to intermediate-sulphidation hydrothermal systems. Rare bismuth, copper, bismuth-copper, gold, and gold-silver tellurides, sulphotellurides (buckhornite), and bismuth sulphosalts are typomorphic for the main economic stage of mineralisation. This paper summarises the particularities of the Te- and Bi-bearing assemblages in the two epithermal deposits and their genetical features