I.I. GOLUBEVA (IG Komi SC UB RAS, SSU named after Pitirim Sorokin), Е.I. TERENTEVA (MNR RK), T.P. MAYOROVA (IG Komi SC UB RAS, SSU named after Pitirim Sorokin), S.I. ISAENKO (IG Komi SC UB RAS)

Petrologic composition of Riphean black shale in the Middle Timan area

Spectrographic, petrochemical, mineralogical and geochemical characteristics of sulfidized carbon-­terrigenous and carbonaceous­-carbonate black shales of the Paunsky suite of the Upper Riphean of Middle Timan area are presented. The main feature of carbon­-bearing terrigenous deposits is the presence of elements such as Li, Rb, Cs, Tl, W, Co, Be, Au, Ti. Carbon­-bearing carbonaceon deposits contain Ta and Nb. Carbonaceous matter is represented by an unordered species. The weighted composition of sulfide sulfur is probably indicate that the Riphean carbon­-bearing deposits were the source of sulfur for the sulfide mineralization.
Keywords: Riphean, black shale, petrochemistry, geochemistry, carbonaceous matter, sulphides, carbon and sulphur isotopes, Middle Timan area.