The question of the origin of hydrocarbon gases of the Khibiny and Lovozersky alkaline intrusive massifs has not been finally solved so far. According to I. A. Petersilie, there are three hypotheses about the origin of hydrocarbon gases: 1) due to assimilation and processing of organic compounds of the Imandra-Varzuga Formation by the magmatic melt; 2) in the magmatic melt (in the form of gas flow they rise to the upper parts of the lithosphere); 3) in the process of intrusion formation, simultaneously with the formation of magmatic rocks ...