Petrographic Features and Carbonaceous Matter of the Black Shales of the Kumak Deposit (Southern Urals, Russia)

The paper gives a petrographic description of the carbonaceous rocks of the Kumak deposit, saturated with carbonaceous matter to varying degrees. The content of carbonaceous matter in them makes it possible to attribute the considered rocks to the carbonaceous type. That the carbonaceous matter, represented by fine dispersed sedimentary organic matter and metamorphic graphite, is of a biogenic nature and experienced metamorphism under conditions of high-temperature subfacies of the greenschist facies. The high stage of catagenesis of organic matter presupposes the already past stage of generation of water, carbon dioxide, methane and other components from it, which are capable of creating organometallic compounds and are carriers of ore elements.