NEW RARE-EARTH CARBONATE AND PHOSPHATE FINDS IN THE UKRAINE

Abstract

The rare-earth minerals yttrosynchysite, parisite and florencite were first discovered by us in diapiric breccia from the Bantyshevo salt stock in the southeastern part of the Dnieper-Donets basin (DDB). For the Ukraine, this is the first find of yttrosynchysite polyhedra, and the second of parisite and florencite. The diapiric breccia is strongly metasomatized and contains disseminated mineralization with chalcocite, pyrrhotite, sphalerite, galena, chalcopyrite, pyrite, marcasite and bournonite. Our work has allowed the metasomatites to be divided into premineral and intramineral. The ore-bearing metasomatites are of the carbonate type with calcite, siderite, dolomite and ankerite and contain polysulfide mineralization. Rare-earth minerals are associated with beresite of specific composition.