Properties

Geology

Hydrogeological, geological and geophysical research to date show that the most important area for supplying Rogaška Slatina with mineral water and CO₂ gas lies between Sečovo in the east and Podlplat and Gabrnik in the west, and between the Donački fault in the north and the Šoštanjski or Rogaški fault in the south. Donat Mg mineral water, Tempel and the spring water Tiha are exploited from this region. At Rogaška Slatina in 1992 south of the Rogaški fault, a thermal mineral water was captured at a depth of 1520 m and with a temperature of 63°C. According to its chemical components it is almost identical to the water at Karlovy Vary (Czech Republic).

According to their balneological classification, the waters are listed as follows:

• Donat Mg: Mg - Na - HCO₃ - SO₄
• Tempel: Mg - Na - Ca - HCO₃
• Tiha: Ca - Mg - HCO₃
• Thermal: Na - HCO₃ - SO₄ - Cl

The exploitation wells for mineral water are from 277 to 606 m deep, for spring water 170 m deep (V-4/70) and for thermal water 1700 m deep (well RT-1/92 27).

We exploit Donat Mg mineral water and Tempel with the help of the natural pressure of gas, and this is pumped through the pipeline to the filling station, separated from the carbon dioxide. For the spring water Tiha we exploit a supplied quantity of water from Well G-4/70, which we regulate with valves and transport gravitationally. From Well RT-1/92, from which flows thermal water, we exploit supplied water, which we regulate with valves, but for transportational purposes we utilise over-pressure in the well which amounts to four bars.

In the surrounding area of Rogaška Slatina in the north-west part of the region by the Donački fault, we find what are probably the oldest lower Permian stones. These are represented mainly by limestone and to a lesser extent by quartz sandstone and clayey slate.

The massive dolomite is of Triassic age.

The largest volume of this is found in the Oligocene stratum. The andesite pyroclasts are from the middle, and maybe even the upper, Oligocene era. Tuffs, tuffits, lapilli tuffs and volcanic breccia are prevalent. They are exposed in the narrow belt between Gabrnik and Zgornje Sečovo. However, according to drilling research data, we know that they are represented throughout the entire area up to the Šoštanjski fault zone Podplat - Tržišče in the south.