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Calibrated geochemical ages of the Baltic Artesian Basin groundwater Cover

Calibrated geochemical ages of the Baltic Artesian Basin groundwater

Open Access
|Dec 2022

Abstract

For the present study, geochemical ages were derived from radiocarbon and radiokrypton age calibration with ground-water chemical contents (Na+, K+, Mg2+, Ca2+, Cl, SO42−, HCO3). Geochemical ages may fill the dating gap (40–150 ka) between the isotope techniques mentioned. A case study of groundwater in the Baltic Artesian Basin has involved geochemical age calibration, data filtering (such as regional subdivision of the basin for more accurate results) and geochemical dating of groundwater of unknown age. Various approaches to interpretations of geochemical age results could be used. Bicarbonate and sulphate are sensitive to the hydrochemical environment and should be omitted from geochemical age calculations. Modern fresh groundwater samples should also be excluded from calibration in order to obtain more reliable trend lines. Calcium-sodium cation exchange occurs in deep aquifers and may be used for geo-chemical age determination of fossil groundwater.

DOI: https://doi.org/10.14746/logos.2022.28.3.0001 | Journal eISSN: 2080-6574 | Journal ISSN: 1426-8981
Language: English
Page range: 179 - 189
Submitted on: Jul 3, 2022
Accepted on: Oct 23, 2022
Published on: Dec 30, 2022
Published by: Adam Mickiewicz University
In partnership with: Paradigm Publishing Services
Publication frequency: 3 issues per year

© 2022 Vytautas Samalavičius, Jurga Arustienė, published by Adam Mickiewicz University
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.