First findings of palladium-gold-REE ore mineralization in precambrian carbonaceous shales on the western slope of the Southern Urals

Rare-earth minerals in carbonaceous shale of the Kumak gold deposit, South Urals, Russia

“…Geologists have a steadily high interest in carbonaceous shales as this is a favorable geochemical environment for the primary accumulation of many minerals, including ore, containing rare earths. In tectonically and magmatically active zones, carbonaceous shales can be both a source of ore-bearing fluids and a host of large gold ore deposits (Sukhoi Log, Muruntau, Kumtor, Natalka, Svetly and other) [1][2][3][4][5][6][7][8][9][10]. The Kumak ore field has been an object of comprehensive research by the Central Research Geological Exploration Institute of Non-Ferrous and Noble Metals since 1960 (researchers N. M. Voin, Yu.…”

Geology and gold content of carbonaceous shale in Baikal mineralization site, Southern Ural

“…They represent a very favorable geochemical environment for the primary chemical adsorption of noble and rare metals and are the source of such metals during metamorphic alteration [1][2][3][4][5][6]. Black shale sediments are associated with gold deposits in the world and in the Southern Ural [7][8][9][10]. In the Orenburg Region of the Southern Ural, gold-bearing ore occurs in carbon deposits of Kumak ore field adjoining the Anikhovsky Graben of the East Ural Uplift.…”