NEON AS A CRITERION FOR NOBLE GAS DISTRIBUTION BETWEEN GAS ACCUMULATIONS AND EDGEWATER

The dependence of the isotopic composition of Ne on the partial pressure of Ne, N and the ratio of N/Ne is analyzed for the first time. The scale of the influence of groundwater on the content and isotopic composition of noble gases in CO, N and CH gas reservoirs is also estimated. It is shown that the partial pressure of Ne in gas accumulations increases in the range: CO – CH – N. The CO gas accumulations are characterized by the mantle isotopic composition of neon, and the N gas accumulations are dominated by a mixture of atmospheric and crustal neon. A model of gas exchange between gas accumulations and groundwater is proposed, which makes it possible to estimate the distribution of noble gases between them.