Origin of high 234U/238U ratio in post-permafrost aquifers

I.V. Tokarev, A.A. Zubkov, V.G. Rumynin, V.A. Polyakov, V.Yu. Kuznetsov, F.E. Maksimov

Research output: Chapter in Book/Report/Conference proceedingConference contributionResearchpeer-review

6 Scopus citations


Isotope composition and concentration (δ2H, δ18O, 234U/238U, Ar, 40Ar/ 36Ar, 3He/4He and 20Ne/ 4He) were measured in the ground waters (Tomsk-7). Water has a distinct cold climate isotope signature δ2H = -127..-140, δ18O = -17.0.. -18.2 in contrast of modern meteoric water δ2H = -117, δ18O = -15.9. Stable isotopes are in concord with noble gas temperature tNGT = 0..+4 °C and helium model ages t = 7-14 ka. Disequilibrium uranium 234U/238U up to 16 (activity ratio) obtained and explained of 234U leaching by the melt water during the permafrost degradation.

Original languageEnglish
Title of host publicationUranium in the Environment
Subtitle of host publicationMining Impact and Consequences
PublisherSpringer Nature
Number of pages10
ISBN (Electronic)978-3-540-28367-6
ISBN (Print)978-3-540-28363-8
StatePublished - 1 Jan 2006
Event4th International conference on Uranium Mining and Hydrogeology, UMH 2005 - Freiberg, Germany
Duration: 1 Sep 20051 Sep 2005


Conference4th International conference on Uranium Mining and Hydrogeology, UMH 2005

Scopus subject areas

  • Geotechnical Engineering and Engineering Geology


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