Three geochemical fields of practical importance are distinguished: (1) Zone of sulfur condensation is of great significance for the formation of many ore deposits and the formation of endogenous native sulfur deposits in zones adjacent to the water neutralization barrier. (2) Water condensation zones serve as a fluid neutralization barrier, where acid fluid flows originate. This zone has a key significance for the formation of hydrothermal, gold, and quartz deposits. (3) Zone of H2S and C02 condensation plays a leading role in the endogenous formation of hydrocarbon deposits.