One million year old groundwater in the Sahara revealed by krypton-81 and chlorine-36 -: art. no. L05503

被引：202
作者：
Sturchio, NC [1 ]
Du, X
Purtschert, R
Lehmann, BE
Sultan, M
Patterson, LJ
Lu, ZT
Müller, P
Bigler, T
Bailey, K
O'Connor, TP
Young, L
Lorenzo, R
Becker, R
El Alfy, Z
El Kaliouby, B
Dawood, Y
Abdallah, AMA
机构：
[1] Univ Illinois, Dept Earth & Environm Sci, Chicago, IL 60607 USA
[2] Argonne Natl Lab, Div Phys, Argonne, IL 60439 USA
[3] Northwestern Univ, Dept Phys, Evanston, IL 60208 USA
[4] Univ Bern, Inst Phys, CH-3012 Bern, Switzerland
[5] SUNY Buffalo, Dept Geol, Buffalo, NY 14260 USA
[6] Argonne Natl Lab, Div Chem, Argonne, IL 60439 USA
[7] Egyptian Geol Survey & Min Author, Cairo 11566, Egypt
[8] Ain Shams Univ, Dept Geol, Cairo 11566, Egypt
来源：
GEOPHYSICAL RESEARCH LETTERS | 2004年 / 31卷 / 05期
关键词：
D O I：
10.1029/2003GL019234
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
Measurements of Kr-81/Kr in deep groundwater from the Nubian Aquifer (Egypt) were performed by a new laser-based atom-counting method. Kr-81 ages range from similar to2 x 10(5) to similar to1 x 10(6) yr, correlate with Cl-36/Cl ratios, and are consistent with lateral flow of groundwater from a recharge area near the Uweinat Uplift in SW Egypt. Low delta(2)H values of the Kr-81-dated groundwater reveal a recurrent Atlantic moisture source during Pleistocene pluvial periods. These results indicate that the Kr-81 method for dating old groundwater is robust and such measurements can now be applied to a wide range of hydrologic problems.
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收藏
页码：L055031 / 4
页数：4
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