Tritiogenic 3He in shallow groundwater

Peter Schlosser, Martin Stute, Christian Sonntag, Karl Otto Münnich

Research output: Contribution to journalArticle

174 Citations (Scopus)

Abstract

Tritium, helium isotope and neon data from a multi-level sampling well (DFG 7) at Liedern/Bocholt (West Germany) are presented and discussed. The presence of a radiogenic helium component leads to 3He 4He ratios below that of atmospheric helium (minimum δ3He values ≈ -60%) below about 20 m depth. The 3He profile can be corrected for the nucleogenic 3He component using the neon measurements. Based on the "Vogel" model of a shallow aquifer the tritium/3He distributions are simulated for the years 1987, 2000 and 2025. The model results show that under favourable conditions the tritiogenic 3He peak will be detectable in shallow aquifers for at least the next 4 decades. The influence of the vertical flow velocity and the transversal dispersion coefficient on simulated distributions are estimated. 3He confinement is calculated as a function of the vertical flow velocity and the transversal dispersion coefficient. There is a critical value of the vertical flow velocity (about 0.25-0.5 m/year) below which the 3He loss increases rapidly to high values.

Original languageEnglish (US)
Pages (from-to)245-256
Number of pages12
JournalEarth and Planetary Science Letters
Volume94
Issue number3-4
DOIs
StatePublished - Jan 1 1989
Externally publishedYes

Fingerprint

Helium
ground water
Flow velocity
Neon
flow velocity
Groundwater
neon
Tritium
aquifers
tritium
Aquifers
helium
groundwater
aquifer
West Germany
helium isotope
helium isotopes
coefficients
Isotopes
sampling

ASJC Scopus subject areas

  • Geophysics
  • Geochemistry and Petrology
  • Earth and Planetary Sciences (miscellaneous)
  • Space and Planetary Science

Cite this

Tritiogenic 3He in shallow groundwater. / Schlosser, Peter; Stute, Martin; Sonntag, Christian; Otto Münnich, Karl.

In: Earth and Planetary Science Letters, Vol. 94, No. 3-4, 01.01.1989, p. 245-256.

Research output: Contribution to journalArticle

Schlosser, Peter ; Stute, Martin ; Sonntag, Christian ; Otto Münnich, Karl. / Tritiogenic 3He in shallow groundwater. In: Earth and Planetary Science Letters. 1989 ; Vol. 94, No. 3-4. pp. 245-256.
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N2 - Tritium, helium isotope and neon data from a multi-level sampling well (DFG 7) at Liedern/Bocholt (West Germany) are presented and discussed. The presence of a radiogenic helium component leads to 3He 4He ratios below that of atmospheric helium (minimum δ3He values ≈ -60%) below about 20 m depth. The 3He profile can be corrected for the nucleogenic 3He component using the neon measurements. Based on the "Vogel" model of a shallow aquifer the tritium/3He distributions are simulated for the years 1987, 2000 and 2025. The model results show that under favourable conditions the tritiogenic 3He peak will be detectable in shallow aquifers for at least the next 4 decades. The influence of the vertical flow velocity and the transversal dispersion coefficient on simulated distributions are estimated. 3He confinement is calculated as a function of the vertical flow velocity and the transversal dispersion coefficient. There is a critical value of the vertical flow velocity (about 0.25-0.5 m/year) below which the 3He loss increases rapidly to high values.

AB - Tritium, helium isotope and neon data from a multi-level sampling well (DFG 7) at Liedern/Bocholt (West Germany) are presented and discussed. The presence of a radiogenic helium component leads to 3He 4He ratios below that of atmospheric helium (minimum δ3He values ≈ -60%) below about 20 m depth. The 3He profile can be corrected for the nucleogenic 3He component using the neon measurements. Based on the "Vogel" model of a shallow aquifer the tritium/3He distributions are simulated for the years 1987, 2000 and 2025. The model results show that under favourable conditions the tritiogenic 3He peak will be detectable in shallow aquifers for at least the next 4 decades. The influence of the vertical flow velocity and the transversal dispersion coefficient on simulated distributions are estimated. 3He confinement is calculated as a function of the vertical flow velocity and the transversal dispersion coefficient. There is a critical value of the vertical flow velocity (about 0.25-0.5 m/year) below which the 3He loss increases rapidly to high values.

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