| Title: | Chemical and isotopic composition of CO2-rich magnesium- sodium-bicarbonate-sulphate-type mineral waters from volcanoclastic aquifer in Rogaška Slatina, Slovenia |
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| Authors: | ID Rman, Nina (Author)
ID Palcsu, László (Author)
ID Lapanje, Andrej (Author)
ID Szőcs, Teodóra (Author) |
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| Files: |  PDF - Presentation file, download (3,11 MB)
MD5: 7BA9B9EA14CA5DEC6F23B66665F2C3C9
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| Language: | English |
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| Typology: | 1.01 - Original Scientific Article |
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| Organization: |  GeoZS - Geological Survey of Slovenia
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| Abstract: | Bottled natural mineral waters from an andesitic aquifer in Slovenia are enriched in magnesium (1.1 g/l), sulphate (2.2 g/l) and dissolved inorganic carbon (204 g/l). We analysed major ions, trace elements, tritium activity, 14 C, d18 OH2O , d2 HH2O, d13 CDIC, gas composition and noble gases in six wells. In addition, 87 Sr/ /86 Sr, d34 SSO4 and d11 B were analysed here for the first time. Stable isotopes with d18 O = -11.97 to -10.30% and d2 H = -77.3 to -63.8 confirm meteoric origin. CO2 degassing is evident at three wells, causing the oxygen shift of about -1.3%. Tritium activity was detectable only in the shallowest well, where the freshwater component was dated to the 1960s. d13 CDIC in five waters is -1.78 to ? 1.33%, typical of carbonate dissolution. Radiocarbon is low, 1.03–5.16 pMC. Chemical correction with bicarbonate concentration and d13 C correction methods gave best mean residence times, slightly longer than previously published. Sulphate has d34 S 26.6–28.9% and d18 O 8.9–11.1% due to dissolution of evaporites in carbonate rocks. Boron at concentrations of 1.2–6.1 mg/l has two origins: d11 B = 11.3–16.4% from hydrothermal alteration and d11 B = 26.6–31.7% from carbonate dissolution. Strontium at concentrations of 0.5–22.0 mg/l has 87 Sr/ /86 Sr, indicating three sources: 0.7106 for Miocene clastic rocks, 0.7082 for Triassic carbonates and 0.7070 for Lower Oligocene andesitic rocks. CO 2 represents the majority of the dissolved ([ 98.84 vol%) and separated gas ([ 95.23 vol%). Methane is only found in two wells with a max. of 0.30 vol%. All waters show excess helium and 16–97% of mantlederived helium. Since all show subsurface degassing, the paleo-infiltration temperature could not be calculated. |
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| Keywords: | natural tracers, carbon, sulphur, strontium and boron isotopes, noble gases |
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| Publication status: | Published |
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| Publication version: | Version of Record |
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| Publisher: | Springer Nature |
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| Year of publishing: | 2022 |
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| Number of pages: | str. 2187–2214 |
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| Numbering: | vol. 44 |
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| PID: | 20.500.12556/DiRROS-14884  |
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| UDC: | 556.3 |
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| ISSN on article: | 0269-4042 |
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| DOI: | 10.1007/s10653-021-01062-2 |
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| COBISS.SI-ID: | 78400003 |
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| Publication date in DiRROS: | 24.03.2022 |
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| Views: | 1259 |
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| Downloads: | 375 |
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