Isotope characterisation of deep aquifers in the Gwda catchment, northern Poland

dc.contributor.authorKotowski, Tomasz
dc.contributor.authorSatora, Stefan
dc.description.abstractWe present the results of isotope measurements (δ 18 O, δ D, δ 13 C DIC and 14 C) and chemical analyses (TDS, TOC, HCO 3– , SO 42– , Cl – , NO 3– , NH 4+ , Ca 2+ , Mg 2+ Na + and K + ) conducted on groundwater samples collected from deep Cenozoic aqui- fers. These aquifers are the basic source of drinking water at numerous localities within the study area in northern Po- land. Most of the δ 18 O determinations are characterised by low variability (i.e., > 70 per cent of δ 18 O are between –9.5‰ and –9.2‰). In most cases tritium activity was not detected or its content slightly exceeded the uncertainty of measure- ment (from ±0.3 T.U. to ± 0.5 T.U.). On average, 14 C activity is twice higher than that under similar conditions and in hydrogeological systems. The δ 13 C DIC values fall within the –13.6‰ to –12.8‰ range. A slight variability is observed when considering all isotope and chemical data within the study area and under these hydrogeological conditions. In general, the results of isotope and chemical analyses seem to be homogeneous, indicating the presence of closely similar groundwaters in the system, irrespective of geological formation. It is likely that there is a significant hydraulic connec- tion between shallow and deep aquifers in the Gwda catchment, which indicates the potential for seepage of pollutants from shallow Pleistocene to deep Miocene aquifers. This can endanger the latter by e.g., high concentrations of NO 3– , SO 42– and Cl – ions from shallow aquifers within the Gwda catchment.pl_PL
dc.identifier.citationGeologos, 2016, 22, 2,pp.137-147pl_PL
dc.identifier.isbnISBN 978-83-232187-4-6
dc.identifier.issnISSN 1426-8981
dc.publisherInstytut Geologii UAMpl_PL
dc.subjectCenozoic aquiferspl_PL
dc.subjectgroundwater datingpl_PL
dc.subjectstable isotopespl_PL
dc.titleIsotope characterisation of deep aquifers in the Gwda catchment, northern Polandpl_PL


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Uniwersytet im. Adama Mickiewicza w Poznaniu
Biblioteka Uniwersytetu im. Adama Mickiewicza w Poznaniu
Ministerstwo Nauki i Szkolnictwa Wyższego