Study of the effect of fossil organic carbon on 14C in groundwater from Hvinningdal, Denmark

E. Boaretto, L. Thorling, Á E. Sveinbjórnsdóttir, Y. Yechieli, J. Heinemeier

Research output: Contribution to journalConference article in journalpeer-review

25 Citations (Scopus)

Abstract

The carbonate hydrochemistry of groundwater from the Hvinningdal aquifer (Denmark) was studied by radiocarbon (accelerator mass spectrometry (AMS)) and δ13C measurements as a preliminary step towards 14C groundwater dating. The 14C concentrations varied between 30 and 100 percent modern carbon (pMC) in apparent contradiction with tritium (3H) data, which in most cases indicate a post-bomb date. The dilution of 14C can be explained as being due to the combined effect of dissolution of old soil carbonate and oxidation of old organic carbon. The last effect proved to be essential. To calculate this correction the dissolved oxygen concentration was used together with the δ13C values. The combined corrections bring the 14C concentrations up to post-bomb levels in better agreement with the 3H data.

Original languageEnglish
Pages (from-to)915-920
Number of pages6
JournalRadiocarbon
Volume40
Issue number2
DOIs
Publication statusPublished - 1997
Externally publishedYes
Event16th International 14C Conference - Conference Centre of Groningen, Groningen, Netherlands
Duration: 16 Jun 199720 Jun 1997

Programme Area

  • Programme Area 2: Water Resources

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