CHEMIZM WÓD PODZIEMNYCH SERII GIPSONOŚNEJ BADENU W PÓŁNOCNEJ CZĘŚCI ZAPADLISKA PRZEDKARPACKIEGO

Abstract

CHEMISTRY OF GROUNDWATER IN GYPSIFEROUS BADENIAN SERIES IN THE NORTHERN PART OF THE CARPATHIAN FOREDEEP

Abstract. Hydrogeological, chemical and modeling investigations of the gypsiferous Badenian series in the marginal part of the Carpathian Foredeep were carried out in the years 2003–2007. Groundwater in this series occurs in the local flow system and it is in hydraulic connection with groundwater in deeper located intermediate flow systems. They are slightly mineralized water, mainly of hydrochemical type SO₄–Ca, sometimes SO₄–HCO₃–Ca. Groundwater of the gypsum series also modifies the chemistry of groundwater in the Upper Cretaceous which occurs in intermediate flow systems. On the base of hydrochemical investigation it has been stated that in the shallow flow systems simple ionic forms are dominant and presence of sulfate forms is observed too. Water circulating in gypsiferous series is oversaturated with regard to calcite and its chemistry is close to equilibrium with gypsum with tendency to oversaturation with growing depth of circulation.