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14C and 234U-Excess Dating of Groundwater in the Haifa Bay Region Israel

Published online by Cambridge University Press:  18 July 2016

Vasily Rogojin ,
Israel Carmi  and
Joel Kronfeld
Vasily Rogojin
Affiliation:
Department of Geophysics, Tel-Aviv University, P.O.B. 39040, Ramat Aviv, Tel-Aviv 69978, Israel
Israel Carmi
Affiliation:
Department of Environmental Sciences and Energy Research, Weizmann Institute of Science, 76100 Rehovot, Israel
Joel Kronfeld
Affiliation:
Department of Geophysics, Tel-Aviv University, P.O.B. 39040, Ramat Aviv, Tel-Aviv 69978, Israel
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Abstract

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Radiocarbon activities and uranium isotopic disequilibria were measured in water samples from both the sandy Pleistocene coastal aquifer and within the upper Cretaceous Judea Group carbonate aquifer of northwestern Israel. The samples in both aquifers exhibit a decrease in 14C activity that is concomitant to the growth in 234U-excess. This suggests that under specific conditions, 234U-excess dating of groundwater can be used to corroborate 14C dates, while offering the possibility of extending the range of dating of groundwater beyond that of 14C.

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