PHYSICOCHEMICAL CONDITIONS OF GRAPHITIZAT ION OF HYDROCARBON-BEARING ROCKS - AN EXAMPLE FROM THE WESTERN SIBERIAN PLATFORM

Physicochemical modeling of interaction in the sedimentary rocks-strat al water-hydrocarbons multisystem under the influence of magmatic heat from trap intrusions showed that the graphitization of the host rocks and the origin of graphite deposits in them occurred only if the rock es contained hydrocarbons and the temperatures of contact katagenesis did not exceed 700 degrees C. The sedimentary rocks bear a specific as semblage of newly formed minerals, and considerable concentrations of aromatic compounds formed in the hydrocarbon-bearing fluids, At such c onditions, graphitization is an indicator of complex physicochemical p rocesses of contact metamorphism and katagenesis, which occurred at de pth under the effect of the basic intrusions.