The origin and chemical composition of Carpathians chloride CO2-rich waters in the light of stable chlorine isotope studies (37Cl and 35Cl)

Authors

  • Paulina Dembska-Sięka AGH University of Science and Technology, Faculty of Geology, Geophysics and Environmental Protection, al. A. Mickiewicza 30, 30-059 Kraków, Poland
  • Andrzej Pelc Mass Spectrometry Laboratory, Maria Curie-Sklodowska University, 20–031 Lublin, Poland
  • Lucyna Rajchel AGH University of Science and Technology, Faculty of Geology, Geophysics and Environmental Protection, al. A. Mickiewicza 30, 30-059 Kraków, Poland

Keywords:

Carpathians, chloride CO2-rich water, chlorine isotopes, chemical composition, origin

Abstract

Investigations into chloride CO2-rich water occurring in the Polish and Slovakian Carpathians were carried out to gain a better understanding of the Cl– sources. The primary Cl– concentration in sea water, processes accompanying diagenesis, together with water-rock-gas interactions, have undoubtedly influenced the present content of chlorides. The Cl–- concentrations in the waters analysed vary from 35.5 to 4148.3 mg/l, lower than in sea water, with a mean ~19000 mg/l. The measured δ37Cl values range from –1.15 to –0.26‰, below the typical sea water value of 0‰. It might be concluded that the chemical and isotopic composition of these waters are the result of reactions during diagenesis (e.g., ion exchange or diffusion through low-permeability clay layers) as well as meteoric water influx.

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Published

2020-04-28

Issue

Vol. 64 No. 1 (2020)

Section

Articles

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