First Findings of Palladium-Gold-REE Ore Mineralization in Precambrian Carbonaceous Shales on the Western Slope of the Southern Urals

摘要

During the last 20 years, a new type of vein-disseminated gold-sulfide ore mineralization with dispersed gold and platinum group minerals has been identified. These deposits are located within rift structures in areas of weakly manifested magmatism and localized in ancient rocks enriched in organic carbon matter. Black shale sequences form extended regional zones, but the deposits within them are associated with local fields, where dynamothermal processes and certain types of metasomatic alterations are manifested. On the western slope of the Southern Urals, Riphean black shale deposits are widespread.