Identification of the barium occurrence and its origin is made on the basis of the groundwater chemistry study. High Ba content has been detected in the Cambrian–Vendian aquifer system in the coastal vicinity of the Gulf of Finland in Estonia and St Petersburg. The dissolution of Ba from witherite as the primary source was derived from the analysis of the aqueous solution equilibrium with Ba-related minerals. It is reflected in the chemical composition of groundwater and influenced by the galenite–calcite–fluorite polymetallic mineralization in Vendian sandstones. The dissolution and re-deposition of carbonates and baryte are confirmed by mineral saturation states for an aqueous solution and distribution of other species in the groundwater of the Cambrian–Vendian aquifer system in North Estonia.
Alm, E., Sundblad, K. & Huhma, H. 2005. Sm-Nd Isotope Determinations of Low-Temperature Fluorite-Calcite-Galena Mineralization in the Margins of the Fennoscandian Shield. SKB Report R-05-66, 2005; Swedish Nuclear Fuel and Waste Management CO, Stockholm, Sweden, 58 pp.
Backman, B., Lahermo, P., Väisänen, U., Paukola, T., Juntunen, R., Karhu, J., Pallinen, A., Rainio, H. & Tanakanen, H. 1999. The Effect of Geological Environment and Human Activities on Groundwater in Finland. The Results of Monitoring in 1969–1996. Geological Survey of Finland, Report of Investigations, 147 pp.
Calabrese, E. J. 1977. Excessive barium and radium-226 in Illinois drinking water. Journal of Environmental Health, 39, 366–369.
Dickson, B. L. 1990. Radium in ground water. In The Environmental Behaviour of Radium, pp. 335–372. Int. Atomic Energy Agency, Vienna.
Kadūnas, V., Katinas, V., Radzevičius, A. & Taraškevičius, R. 2004. Nuosėdų mikroelementinės sudėties kaita sedimentacijos paleobaseinuose ir geocheminių anomalijų susidarymas. [Alteration of the content of trace elements of sediments and its anomalies in sedimentary palaeobasins]. In Evolution of Earth Crust and its Resources in Lithuania (Baltrūnas, V., ed.), pp. 123–144. Vilnius [in Lithuanian].
Karro, E. & Marandi, A. 2003. Mapping of potentially hazardous elements in the Cambrian–Vendian aquifer system, northern Estonia. Bulletin of the Geological Society of Finland, 75, 17–27.
Klimas, A. 1988. Trace elements in fresh groundwater of Lithuania. Geochemistry, 3, 367–375.
Koljonen, T. 1992. The Geochemical Atlas of Finland, Part 2: Till. Geological Survey of Finland, Espoo, 218 pp.
Kolodiy, V. V. 1983. Podzemnye vody neftegazonosnykh provintsij i ikh rol¢ v migratsii i akumulyatsii nefti [Groundwaters of oil and gas provinces in the southern part of the USSR and their importance in oil migration]. Naukova Dumka, Kiyev, 248 pp. [in Russian ].
Koppelmaa, H. & Kivisilla, J. 1997. Geological Map of the Crystalline Basement of North-Eastern Estonia. Scale 1 : 200 000, Explanation to the Map. Geological Survey of Estonia, Tallinn, 37 pp.
Krainov, S. R. & Shvec, V. M. 1987. Geokhimiya podzemnykh vod khozyajstvenno-pit¢evogo naznacheniya [Hydrogeochemistry of the industrial-potable groundwater]. Nedra, Moscow, 237 pp. [in Russian].
Marandi, A., Karro, E. & Puura, E. 2004. Barium anomaly in the Cambrian–Vendian aquifer system in North Estonia. Environmental Geology, 47, 132–139.
doi:10.1007/s00254-004-1140-y
Mokrik, R. 2003. Baltijos baseino paleohidrogeologija. Neoproterozojus ir Fanerozojus [The paleohydrogeology of the Baltic Basin. Neoproterozoic and Phanerozoic]. Vilnius University Publishing House, Vilnius, 334 pp. [in Lithuanian].
Mokrik, R. & Mažeika, J. 2002. Paleohydrogeological reconstruction of groundwater recharge during Late Weichselian in the Baltic Basin. Geologija (Vilnius), 39, 49–57.
Mokrik, R., Petkevičius, R. & Kirsimäe, K. 2000. The palaeohydrogeology of the Cambrian–Vendian aquiferous system in the Baltic Basin. Geologija (Vilnius), 31, 79–92.
Nordstrom, D. K. & Jenne, E. A. 1977. Fluorite solubility equilibria in selected geothermal waters. Geochimica et Cosmochimica Acta, 41, 175–188.
doi:10.1016/0016-7037(77)90224-1
Otsa, E. & Tamm, I. 1997. Kirde-Eesti tööstuspiirkonna reostunud põhjavee seire. [The monitoring of the waste groundwater in north-east Estonia]. In Eesti Keskkonnaseire 1996 (Roots, O. & Talkop, R., eds), pp. 157–159. Tallinn [in Estonian].
Parkhurst, D. L., Thorstenson, D. C. & Plummer, L. N. 1980. PHREEQE – a Computer Program for Geochemical Calculations. US Geological Survey, 210 pp.
Raudsep, R. 1997. Mineral occurrences. In Geology and Mineral Resources of Estonia (Raukas, A. & Teedumäe, A., eds), pp. 369–372. Estonian Academy Publishers, Tallinn.
Reeves, A. L. 1986. Barium. In Handbook of the Toxicology of Metals, Vol. II, Specific Metals (Friberg, L., Nordberg, G. F. & Velimir, B., eds), pp. 84–93. Elsevier Science Publishers, Amsterdam.
SanPiN. 1996. Drinking Water Hygienic Requirements on Water Quality in Centralized Water Supply Systems. Water Quality Control. RF State Committee for Sanitary and Epidemiological Control, Moscow, 111 pp.
Subramanian, K. S. & Meranger, J. C. 1984. A survey for sodium, potassium, barium, arsenic and selenium in Canadian drinking water supplies. Atomic Spectroscopy, 5, 34–37.
Taffet, M. 2004. Study of the Reactions Controlling the Mobility of Uranium in Ground and Surface Water Systems in Contact with Apatite. Report UCRL-TR-203891, Lawrence Livermore National Laboratory, 31 pp.
Torres, M. E., Brumsack, H. J., Bohrmann, G. & Emeis, K. C. 1996. Barite fronts in continental margin sediments: a new look at barium remobilization in the zone of sulfate reduction and formation of heavy barites in authigenic fronts. Chemical Geology, 127, 125–139.
doi:10.1016/0009-2541(95)00090-9
Traber, D. 2002. Geohydraulic and Geochemical Basis of Geochemical Fluxes from Deep Groundwaters Observed at the Earth’s Surface. Report YST-108, Nuclear Waste Disposal Research, Geological Survey of Finland, 93 pp.
[US EPA] U.S. Environmental Protection Agency. 1995. Contaminant Specific Fact Sheets. Inorganic Chemicals-Consumer Version. National Primary Drinking Water Regulations. EPA 811-F-95-002-C, 30 pp.
Van Duijvenboden, W. 1989. The Quality of Ground Water in the Netherlands. RIVM Report No. 728820001, National Institute of Public Health and Environmental Protection, Bilthoven, 48 pp.
Wedepohl, K. H. 1978. Handbook of Geochemistry, Vol. 1. Springer-Verlag, Berlin, 422 pp.
[WHO] World Health Organization. 1990. Barium. International Programme on Chemical Safety (Environmental Health Criteria 107). World Health Organization, Geneva.
[WHO] World Health Organization. 1996. Guidelines for Drinking-Water Quality. 2nd ed. 2: Health Criteria and Other Supporting Information. WHO, Geneva, 198 pp.