Author:
Samalavičius Vytautas,Arustienė Jurga
Abstract
For the present study, geochemical ages were derived from radiocarbon and radiokrypton age calibration with groundwater 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 geochemical age determination of fossil groundwater.
Publisher
Adam Mickiewicz University Poznan
Subject
General Earth and Planetary Sciences
Reference53 articles.
1. Atkinson, A.P., Cartwright, I., Gilfedder, B.S., Cendón, D.I., Unland, N.P. & Hofmann, H., 2014. Using 14C and 3H to understand groundwater flow and re-charge in an aquifer window. Hydrology and Earth System Sciences 18, 4951–4964. 10.5194/hess-18-4951-2014
2. Babre, A., Kalvāns, A., Popovs, K., Retiķe, I., Dēliņa, A., Vaikmäe, R. & Martma, T., 2016. Pleistocene age paleo-groundwater inferred from water-stable isotope values in the central part of the Baltic Artesian Basin. Isotopes in Environmental and Health Studies 52, 706–725. 10.1080/10256016.2016.116841127142454
3. Banys, J., Juodkazis, V. & Mokrik, R., 1979. Regional regularities of radiocarbon distribution in groundwaters of the Baltic artesian basin. Water Resources 6, 243–248 (in Russian).
4. Bethke, C.M. & Johnson, T. M., 2008. Groundwater age and groundwater age dating. Annual Review of Earth and Planetary Sciences 36, 121–152. 10.1146/annurev.earth.36.031207.124210
5. Ciężkowski, W., Gröning, M., Leśniak, P.M., Weise, S.M. & Zuber, A., 1992. Origin and age of thermal waters in Cieplice Spa, Sudeten, Poland, inferred from isotope, chemical and noble gas data. Journal of Hydrology 140, 89–117. 10.1016/0022-1694(92)90236-O