Natural concentrations of major and trace elements in some Norwegian bedrock groundwaters |
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| Affiliation: | 1. Institut des Sciences de la Terre, Centre d''Etudes et de Recherches de Djibouti (CERD), Route de l''aéroport, B.P. 486, Djibouti – ville, République de Djibouti;2. Département des génies civil, géologique et des mines, Polytechnique Montréal, C.P. 6079, succ. Centre-Ville, Montréal, QC H3C 3A, Canada;3. UMR G-EAU, BP 5095, 34196 Montpellier Cedex 5, France;4. GEOTOP Research Center, Montréal, Canada;5. Département de biologie, chimie et géographie, Université du Québec à Rimouski, 300, Allée des Ursulines, Rimouski, QC G5L 3A1, Canada;6. Department of Physics and Earth Sciences “Macedonio Melloni”, University of Parma, Parco Area delle Scienze 157/a, 43124 Parma, Italy;1. School of Earth Science and Geological Engineering, Sun Yat-sen University, Guangzhou 510275, China;2. Department of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong, China |
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| Abstract: | Twenty-eight groundwater samples have been collected from boreholes in bedrock aquifers in Nord Trøndelag (Central Norway), the Hvaler archipelago and other areas around Oslofjord (South-eastern Norway). A clear relationship is demonstrated between many chemical parameters and lithology or geographical location. The parameters electrical conductivity, Cl−, SO42−, F−, Na, Al, Fe, Be, Bi, Cd, Cu, La, Mo, Pb, Th, Tl, U, Y, Zn, Zr, B, Rn, and Si have generally higher values in the Iddefjord Granite of Hvaler, while pH, alkalinity, Ca, Mg, Cs, Rb, and Sr are highest in Trøndelag. Several parameters such as F−, Na, Fe, U, Rn and possibly Al exceed drinking water norms on Hvaler. Measured values of the analyzed parameters compare well (except F−) with the Dutch “A” (background) values, developed for assessment of anthropogenic contamination. The authors warn, however, against uncritical use of “norms” developed in countries with other dominant lithologies than Norway. |
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