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Abstract:
Polycrystalline aggregates of diamonds, known as bort, framesite, diamondite, are densely cemented aggregates of small (<1 mm) crystals of both transparent and dark color. The study of fluid inclusions in three samples from the Mir and Udachnaya kimberlite pipes (Yakutia) by IR spectroscopy and GC-MS methods for the first time showed the hydrocarbons and their derivatives contained in them. A total content (from 25.7 to 57.3 rel. %) significantly lower, and the amount of carbon dioxide (up to 39.5 rel. %) and water (up to 41 rel. %) is significantly higher compared to macro-diamonds from kimberlite pipes and placers in Yakutia. The assumption of the possibility of the participation of deep hydrocarbons and CO2 in the formation of diamonds is confirmed.
