Abstract
1 min readGeological position and composition data for ferruginous-siliceous sediments from Babaryk massive sulfide field of Alexandrinka ore area of Southern Urals are presented. Ore control (gossans) and ore free (jasperites) facies are diagnosed by mineralogical composition and trace elements content. The relicts of chloritized hyaloclasts, zonal crystals of pyrite and hematite-quartz pseudomorph on chalcopyrite clasts were established in gossans. Biomorphiс and clasts-like structure carbonate consist of monheimite. Composition of the accessory minerals such as apatite, monazite, REE-containing epidote, and leucoxene is described. In jasperites hematite-quartz isolations are characterized breccia texture with a non-uniform internal structure, spherolitic and cocarde microstructure with garnet and needle crystals of hematite. Biomorphic structures sharply differ in ore control and ore free facies. Distribution of trace elements in ferruginous-siliceous sediments is considered. The received data are compared with similar sediments from Alexandrinka VMS deposit.
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