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The tritium-helium-3 method and its application to groundwater dating by the example of the Kirovsk mine region,Murmansk oblast |
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| Authors: | A V Gudkov I L Kamensky G S Melikhova V I Skiba I V Tokarev I N Tolstikhin |
| Institution: | 1. Geological Institute, Kola Scientific Center, Russian Academy of Sciences, ul. Fersmana 14, Apatity, 184209, Russia 2. OAO Murmanskaya geologorazvedochnaya ekspeditsiya, ul. Fersmana 24, Apatity, 184209, Russia 3. St. Petersburg Division, Institute of Geoecology, Russian Academy of Sciences, Chetyrnadtsataya Liniya 29, Vasil’evskii Ostrov, St. Petersburg, 199178, Russia 4. Space Research Institute, Russian Academy of Sciences, ul. Profsoyuznaya 84/32, Moscow, 117997, Russia |
| Abstract: | The measurement of 3H, 3He, 4He, and 20Ne concentrations in waters at the Tsentralny pumping station (southern Khibiny massif, Kola Peninsula) showed that they are a mixture of young (>90%) and old (<10%) waters. The excess noble gas component from the young water is caused by the dissolution of air bubbles trapped during recharge in the unsaturated zone. The 3H-3He(3H) age of the young water is 21 ± 1.5 yr. The U-Th-4He age of the old water is about 50 ka. The high concentrations of helium and some toxic elements (e.g., aluminum) in this old water are caused by dissolution of the alkaline rocks of the Khibiny massif as a result of water-rock interaction. |
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