title: Use of radiometric (234/238U and228/226Ra) and mass spectrometry (87/86Sr) methods for studies of the stability of groundwater reservoirs in Central Poland.
abstract: The uranium (234U/238U) and radium (228Ra/226Ra) activity ratios and87Sr/86Sr isotopic ratio in thermal groundwater, subsurface water (groundwater) and river water from Poddebice and Uniejow were determined. The uranium and radium activity ratios and strontium isotopic ratio varied from 0.629 to 1.471, from 0.396 to 4.961 and from 0.708438 to 0.710344, respectively. The results for the thermal groundwater samples showed that the radiometric method together with mass spectrometry stable strontium isotope ratio measurements can be used for underground water transport studies. On the basis of the uranium and radium activity and the strontium isotopic ratio differences in subsurface water (groundwater) and in river water, any possible water influx between these adjacent reservoirs can be observed. The obtained results exclude any water transport from surface and subsurface water to thermal ground water reservoirs in this region of Poland.
authors.affiliation: Department of Chemistry, Technical University of Lodz, Zeromskiego Street 116, 90-924 Lodz, Poland ; Faculty of Building Engineering, Mechanics, and Petrochemistry, Institute of Chemistry, Warsaw University of Technology, Lukasiewicza Street 17, 09-400 Plock, Poland.
authors.forename: P
authors.initials: P
authors.lastname: Grabowski
authors.affiliation: Department of Chemistry, Technical University of Lodz, Zeromskiego Street 116, 90-924 Lodz, Poland.
authors.forename: H
authors.initials: H
authors.lastname: Bem
authors.affiliation: Deutsches GeoForschungsZentrum, Telegrafenberg, 14473 Potsdam, Germany.
authors.forename: R L
authors.initials: RL
authors.lastname: Romer
keywords: 228Ra/226Ra activity ratio; 234U/238U activity ratio; 87Sr/86Sr isotopic ratio; Isotopic study; Thermal groundwater