Application of super(3) super(6)Cl as a dating tool for modern groundwater

The super(3) super(6)Cl/Cl ratios of groundwater samples were measured by accelerator mass spectrometry (AMS) in order to investigate the potential use of super(3) super(6)Cl as a dating tool for modern groundwater. Groundwater samples were obtained from several piezometers in the Oderbruch in north...

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Published in:Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms Beam interactions with materials and atoms, 2007-06, Vol.259 (1), p.479-485
Main Authors: Tosaki, Y, Tase, N, Massmann, G, Nagashima, Y, Seki, R, Takahashi, T, Sasa, K, Sueki, K, Matsuhiro, T, Miura, T, Bessho, K, Matsumura, H, He, M
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Language:English
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Summary:The super(3) super(6)Cl/Cl ratios of groundwater samples were measured by accelerator mass spectrometry (AMS) in order to investigate the potential use of super(3) super(6)Cl as a dating tool for modern groundwater. Groundwater samples were obtained from several piezometers in the Oderbruch in northeastern Germany. The shallow confined aquifer of the area is mainly recharged by the infiltration from the River Oder. From the results of measurements, the pre-bomb and the recent background super(3) super(6)Cl/Cl ratios in the basin of the Oder were estimated to be 7-9x10 super(-) super(1) super(4). The super(3) super(6)Cl fallout values estimated from the super(3) super(6)Cl/Cl ratios of the Oderbruch samples, which were dated by the super(3)H/ super(3)He method, show good agreement with Dye-3 ice core data. These results suggest that the distribution of super(3) super(6)Cl in groundwaters reflects the influence of the super(3) super(6)Cl bomb pulse. This, in turn, suggests that the distribution of super(3) super(6)Cl/Cl in modern groundwaters could reveal groundwater ages and flow systems in a region.
ISSN:0168-583X
DOI:10.1016/j.nimb.2007.02.096