Analysis of n(87Sr)/n(86Sr), δ88Sr/86SrSRM987 and elemental pattern to characterise groundwater and recharge of saline ponds in a clastic aquifer in East Austria
- Autor(en)
- Anastassiya Tchaikovsky, Hermann Häusler, Martin Kralik, Andreas Zitek, Johanna Irrgeher, Thomas Prohaska
- Abstrakt
Elemental and isotopic pattern of n(87Sr)/n(86Sr) and δ88Sr/86SrSRM987 were used to characterise groundwater and recharge of saline ponds in a clastic aquifer in East Austria. Therefore, shallow, artesian and thermal groundwaters of the investigated aquifer along with rainfall and rivers were analysed using (MC) ICP-MS. The n(87Sr)/n(86Sr) ratio and elemental pattern changed with aquifer depth as a result of progressing bedrock leaching and dissolution with increasing groundwater residence time. The n(87Sr)/n(86Sr) ratio of shallow groundwater below saline ponds of 0.71019 ± 0.00044 was significantly different from thermal groundwater of 0.71205 ± 0.00035 (U, k = 2). In contrast to previous theories, this result suggested no recharge of saline ponds by upwelling paleo-seawater. Isotope pattern deconvolution revealed that rainfall accounted to about 60% of the n(87Sr)/n(86Sr) ratio of shallow groundwater below saline ponds. The δ88Sr/86SrSRM987 values of groundwater decreased from about 0.25 ‰ in most shallow, to predominantly negative values of about –0.24 ‰ in artesian groundwater. This result indicated leaching and dissolution of weathered minerals. In turn, the δ88Sr/86SrSRM987 of deep thermal groundwater showed positive values of about 0.12 ‰, which suggested removal of 86Sr from solution by carbonate precipitation. These results highlight the potential of δ88Sr/86SrSRM987 signature as an additional geochemical tracer.
- Organisation(en)
- Externe Organisation(en)
- Universität für Bodenkultur Wien, Helmholtz-Zentrum hereon GmbH, Montanuniversität Leoben
- Journal
- Isotopes in Environmental and Health Studies
- Band
- 55
- Seiten
- 179-198
- Anzahl der Seiten
- 20
- ISSN
- 1025-6016
- DOI
- https://doi.org/10.1080/10256016.2019.1577832
- Publikationsdatum
- 03-2019
- Peer-reviewed
- Ja
- ÖFOS 2012
- 105303 Hydrogeologie, 104002 Analytische Chemie, 105906 Umweltgeowissenschaften
- Schlagwörter
- ASJC Scopus Sachgebiete
- Allgemeine Umweltwissenschaft, Inorganic Chemistry, Environmental Chemistry
- Link zum Portal
- https://ucrisportal.univie.ac.at/de/publications/503129bb-9288-47ff-a049-9336d530383d