One million year old groundwater in the Sahara revealed by krypton‐81 and chlorine‐36
By Neil Sturchio, X. Du, R. Purtschert, B. Lehmann, Mohamed Sultan, Leslie J. Patterson, Zheng-Tian Lu, P. Müller, T. Bigler, K. Bailey and 8 more. 2004
238 citations recorded by the source corpus.
Measurements of 81Kr/Kr in deep groundwater from the Nubian Aquifer (Egypt) were performed by a new laser‐based atom‐counting method. 81Kr ages range from ∼2 × 105 to ∼1 × 106 yr, correlate with 36Cl/Cl ratios, and are consistent with lateral flow of groundwater from a recharge area near the Uweinat Uplift in SW Egypt. Low δ2H values of the 81Kr‐dated groundwater reveal a recurrent Atlantic moisture source during Pleistocene pluvial periods. These results indicate that the 81Kr method for dating old groundwater is robust and such measurements can now be applied to a wide range of hydrologic problems.
Subfields: Atmospheric Science, Geochemistry and Petrology, Mechanics of Materials
View Paper: https://www.semanticscholar.org/paper/5274a74933d12acb03ea7c6cdd3bb7330a90603e
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Citations in the corpus
- Non-renewable groundwater use and groundwater depletion: a review (2019, background): “…Aquifer, there is also evidence of alternating dry and wet periods over the last 200 ka (Castañeda et al 2009) and probably before as dating with krypton isotopes revealed groundwater ages of order 106 years from samples taken at 1200 m depth from the Nubian aquifer system (Sturchio et al 2004).”