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

Publikation: Bidrag til tidsskriftKonferenceartikel i tidsskriftpeer review

25 Citationer (Scopus)

Abstrakt

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.

OriginalsprogEngelsk
Sider (fra-til)915-920
Antal sider6
TidsskriftRadiocarbon
Vol/bind40
Udgave nummer2
DOI
StatusUdgivet - 1997
Udgivet eksterntJa
Begivenhed16th International 14C Conference - Conference Centre of Groningen, Groningen, Holland
Varighed: 16 jun. 199720 jun. 1997

Emneord

  • C14 datering grundvand

Programområde

  • Programområde 2: Vandressourcer

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