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    STUDIA GEOLOGIA - Ediţia nr.2 din 2008  
         
  Articol:   THERMO-MINERAL WATERS FROM THE CERNA VALLEY BASIN (ROMANIA).

Autori:  IOAN POVARĂ, GEORGEL SIMION, CONSTANTIN MARIN. 		 
       
         
  Rezumat:  In the Cerna Valley basin, located southwest of the Southern Carpathians and upstream from the confluence of Cerna with Belareca, an aquifer complex has developed. The basin is strongly influenced by hydrogeothermal phenomena, acting within two major geological structures, the Cerna Syncline and the Cerna Graben. The complex consists mainly of Jurassic and Cretaceous carbonate rocks, as well as the upper part of the Cerna Granite that is highly fractured, tectonically sunken into the graben. The geothermal investigations have shown the existence of some areas with values of the geothermal gradient falling into the 110-200ºC/km interval, and temperatures of 13.8-16ºC at the depth of 30 m. The zone with the maximal flux intensity is situated between the Băile Herculane railway station and the Crucea Ghizelei Well, an area where 24 sources (10 wells and 14 springs) are known. The geothermal anomaly is also extended to the south (Topleţ), north (Mehadia) and NE (Piatra Puşcată), a fact, which is stressed by the existence of hypothermal springs with low mineralization. The physical-chemical parameters of the sources show a strong N-S variability. At the entire thermo-mineral reservoir scale, the temperature of the water sources, the total mineralization, and the H2S quantity are increasing from the north to the south, and the pH and natural radioactivity are following the same trend.

Key words: thermo-mineral waters, karst, hydrogeology, hydrochemistry, Cerna Valley, Romania. 		 
         
     
         
         
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