Rough diamond quality forecasting in deposits of various petrochemical types
Two structural types of dolomite are marked out in the clay and carbonate deposits of the Ovinparmsky horizon. The first micriteand microspardolomite is localized in the thin clay layers enriched with organic substance — a product of cyanobacterial mats. The second spar type of dolomiteis (small-middle-sized crystals) is connected with the grainlimestones (bioclastic rocks) and has the replacement origin, occurring at the stage of katagenesis.