Tritium/3He dating of shallow groundwater

Details Tritium/3He dating of shallow groundwater Tritium/3He dating of shallow groundwater

Aug 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988e%26psl..89..353s&link_type=abstract

Earth and Planetary Science Letters, Volume 89, Issue 3-4, p. 353-362.

Physics

40

Scientific paper

Combined tritium/3He data from three multi-level sampling wells (DFG 1, DFG 4, DFG 7) located at Liedern/ Bocholt, West Germany, are presented and principles of the tritium/3He method in shallow groundwater studies are discussed. The 3He excess produced by radioactive decay of bomb tritium (released mainly between 1952 and 1963) is clearly reflected in the data. The tritiogenic 3He signal can be detected with a good resolution (signal/1σ error: ~ 350). The confinement of the tritiogenic 3He is estimated to approximately 77-85% at site DFG 4. For the bomb tritium peak the deviation of the tritium/3He age from the age determined by identifying the groundwater layer recharged between 1962 and 1965 is about 3 years (15%). The deviation can be explained by diffusive 3He loss across the groundwater table and by flow dispersion.

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