de STEFAN AIRINEI1, A. PRICAJAN2, T. BANDRABUR3
1Universitatea din Bucuresti, Facultatea de geologie si geografie
2Directia controlului minier din M.M.P.G., Bucuresti
3Institutul de Geologie si Geofizica al M.M.P.G., Bucuresti
THE SIGNIFICANCE OF THE NEOGENE VOLCANISM IN ROMANIA
IN THERMAL WATER SPRING
(Abstract)
Most of the thermal waters recognized over the Eastern Carpathians and the Apuseni Mountains areas are considered as products of postvolcanic manifestations associated with the Neogene volcanism, as well as the moffetic and solfatarian emanations. Over the both areas corresponding to the two distinct segments of the Carpathian orogenesis, the Neogene volcanism occupies a surface of about 7 400 kms. The rooting of the volcanic edifice took place along the systems of higher thermic conductivity of the eruptive masses, good ways of conductive transfer, in a high proportion, of the geothermic energy from the deep-seated zones of the lithosphere to the surface. This conductive transfer situates the geothermic anomalies in the regions with Neogene eruptive masses. The underground waters which can penetrate into the hot zones are submitted to the thermalization process proportionally to the depth they reached and to the caloric intensity of the respective level. The return of the thermalized waters to the surface is accompanied by loss of heat yielded to the environment (through penetrating convective transfer), this being cause of the so-called hydrogeothermic anomalies. The efficiency of the transport of heat by the thermalized waters to the surface is a function of the depth, circulation velocity and thermic conductivity of the rocks along the circulation ways crossed by the waters.