In order to better understand both the fixation and migration of gases in evaporites, investigations were performed in five horizontal boreholes drilled in an underground potash seam. According to the He-isotopes, a small contribution of mantle gas can be found in the geogenic salt gas. We assume that CO₂ and CH₄ are related to volcanic activity, where they isotopically equilibrated at temperatures of 513 °C to 519 °C about 15 to 16 Ma ago.

Salt caverns are important as subsurface storage space. Knowledge of geochemical interactions in the transition zone between cavity and salt rock is necessary. Lab-based experiments were performed in hand-sized specimens by creating cm-sized cavities. XRF mapping represents a suitable technique to track spatial mineralogical changes related to rock-fluid interaction in salt rocks and showed a clear separation between Na, Mg and K salt layers. Fluorescent visualize potential fluid pathways.