Radiocarbon in Seawater Intruding into the Israeli Mediterranean Coastal Aquifer
water rock interaction
salt water intrusion
C 13 C 12
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CitationYechieli, Y., Sivan, O., Lazar, B., Vengosh, A., Ronen, D., & Herut, B. (2001). Radiocarbon in seawater intruding into the Israeli Mediterranean coastal aquifer. Radiocarbon, 43(2B), 773-781.
DescriptionFrom the 17th International Radiocarbon Conference held in Jerusalem, Israel, June 18-23, 2000.
AbstractSaline groundwaters from the Israeli coastal aquifer were analyzed for their radiocarbon and tritium content to assess the rate of seawater penetration. The low 14C values (28-88 pMC versus 100-117 pMC in seawater) imply an apparent non-recent seawater source, or water-rock interactions along the penetration route. The latter process is supported by measurable tritium values at some locations, which imply a relatively rapid rate of seawater intrusion. In other locations, low tritium values (<2 T.U.) indicate that recent seawater (<50 yr) did not penetrate inland. The low delta-13C values in saline groundwater (average of -5.3 per mil versus 0 per mil in seawater) indicate that the dissolved carbon pool is comprised of a significant fraction of organic carbon. A linear negative correlation between delta-13C and 14C implies that this organic source is old (low 14C values).
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