Tritiogenic 3He in shallow groundwater

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

doi:10.1016/0012-821X(89)90144-1

Tritiogenic ³He in shallow groundwater

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

Research output: Contribution to journal › Article

182 Scopus citations

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 ³He⁴He 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 language	English (US)
Pages (from-to)	245-256
Number of pages	12
Journal	Earth and Planetary Science Letters
Volume	94
Issue number	3-4
DOIs	https://doi.org/10.1016/0012-821X(89)90144-1
State	Published - Sep 1989
Externally published	Yes

ASJC Scopus subject areas

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

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Schlosser, P., Stute, M., Sonntag, C., & Otto Münnich, K. (1989). Tritiogenic ³He in shallow groundwater. Earth and Planetary Science Letters, 94(3-4), 245-256. https://doi.org/10.1016/0012-821X(89)90144-1

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title = "Tritiogenic 3He in shallow groundwater",

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.",

author = "Peter Schlosser and Martin Stute and Christian Sonntag and {Otto M{\"u}nnich}, Karl",

year = "1989",

month = sep,

doi = "10.1016/0012-821X(89)90144-1",

language = "English (US)",

volume = "94",

pages = "245--256",

journal = "Earth and Planetary Sciences Letters",

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TY - JOUR

T1 - Tritiogenic 3He in shallow groundwater

AU - Schlosser, Peter

AU - Stute, Martin

AU - Sonntag, Christian

AU - Otto Münnich, Karl

PY - 1989/9

Y1 - 1989/9

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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