One million year old groundwater in the Sahara revealed by krypton-81 and chlorine-36
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 \~2x10^5 to ~1x10^6 yr, correlate with 36Cl/Cl ratios, and are consistent with lateral flow of groundwater from a recharge area near the Uweinat...
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| Veröffentlicht in: | arXiv.org 2004-02 |
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| creator | Sturchio, N C X Du Purtschert, R Lehmann, B E Sultan, M Patterson, L J Z -T Lu Mueller, P Bigler, T Bailey, K O'Connor, T P Young, L Lorenzo, R Becker, R Z El Alfy B El Kaliouby Dawood, Y Abdallah, A M A |
| description | 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 \~2x10^5 to ~1x10^6 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 delta-2H 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. |
| doi_str_mv | 10.48550/arxiv.0402092 |
| format | Article |
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| language | eng |
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| source | Free E- Journals |
| subjects | Aquifers Chlorine Dating techniques Groundwater Groundwater recharge Hydrology Krypton Laser applications Uplift |
| title | One million year old groundwater in the Sahara revealed by krypton-81 and chlorine-36 |
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