Beregivske ore field is located in the Transcarpathian region of Ukraine, it is localized at the junction of the Transcarpathian volcanic belt of the Carpathians and the Pannonian median mass. Hydrothermal deposits of ore field belong to the epithermal type and presented by noble metal and polymetallic ore. Rare finding of alunite in the lower horizons in barite-quartz veins caught our attention, and we have attempted to identify the reasons for its occurrence. The main research tool was selected ontogenetic and cathodoluminescence methods of the mineralogy. As a result, it is determined that the alunite arose later than barite. The alunite appearance was possible by a greater flow of acid solutions in the mineral forming system.
Key words: epithermal, alunite, barite, cathodoluminescence.