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DOI	10.1016/j.epsl.2018.12.035
	Chlorine isotopes as tracers of solute origin and age of groundwaters from the Eastern Desert of Egypt
	Sherif, Mahmoud I.1,3; Sultan, Mohamed 2; Sturchio, Neil C.1
通讯作者	Sherif, Mahmoud I.
来源期刊	EARTH AND PLANETARY SCIENCE LETTERS
ISSN	0012-821X
EISSN	1385-013X
出版年	2019
卷号	510 页码:37-44
英文摘要	Chlorine-36 abundances and stable chlorine isotope ratios (Cl-37/Cl-35) were analyzed to decipher sources of chloride and to estimate subsurface residence times of groundwaters from the Nubian Sandstone Aquifer System (NSAS), alluvial aquifers, and fractured basement aquifers in the Eastern Desert of Egypt. Chlorine-36 isotopic abundances (Cl-36/Cl) ranged from 5 x 10(-15) to 343 x 10(-15). The range in delta Cl-37 values was -0.61 to +0.90 parts per thousand. Groundwater solute compositions were dominated by Na, Ca, Cl, and SO4 with total dissolved solids ranging from 445 to 13,700 mg/L. Chemical and isotopic data indicate that dry fallout of marine aerosols and evaporated vadose-zone residues from precipitation that recharged the aquifers may have been the main sources of groundwater solutes. Apparent groundwater Cl-36 model ages range from 0 (+/-40) to 1300 (+300/-180) kyr. Groundwater from the fractured basement aquifers in the southwestern part of the study area had the youngest apparent ages, while that from deep wells tapping the Nubian aquifer had the oldest apparent ages. Shallow alluvial aquifers having anomalously old apparent Cl-36 model ages indicate mixing of old Nubian aquifer water with modern recharge in alluvial aquifers. Stable isotope ratios of hydrogen and oxygen support this inferred mixing relationship and allowed quantitative estimation of old/young water mixing fractions. (C) 2019 The Author(s). Published by Elsevier B.V.
英文关键词	Eastern Desert Egypt groundwater Nubian Aquifer Cl-36 chlorine isotopes
类型	Article
语种	英语
国家	USA ; Egypt
开放获取类型	hybrid
收录类别	SCI-E
WOS记录号	WOS:000460069800004
WOS关键词	OLD GROUNDWATER ; NUBIAN AQUIFER ; CL-36 ; SYSTEM ; WATER ; RECHARGE ; FALLOUT
WOS类目	Geochemistry & Geophysics
WOS研究方向	Geochemistry & Geophysics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215072
作者单位	1.Univ Delaware, Dept Geol Sci, Newark, DE 19716 USA; 2.Western Michigan Univ, Dept Geol & Environm Sci, Kalamazoo, MI 49008 USA; 3.Tanta Univ, Dept Geol, Tanta 31527, Egypt
推荐引用方式 GB/T 7714	Sherif, Mahmoud I.,Sultan, Mohamed,Sturchio, Neil C.. Chlorine isotopes as tracers of solute origin and age of groundwaters from the Eastern Desert of Egypt[J],2019,510:37-44.
APA	Sherif, Mahmoud I.,Sultan, Mohamed,&Sturchio, Neil C..(2019).Chlorine isotopes as tracers of solute origin and age of groundwaters from the Eastern Desert of Egypt.EARTH AND PLANETARY SCIENCE LETTERS,510,37-44.
MLA	Sherif, Mahmoud I.,et al."Chlorine isotopes as tracers of solute origin and age of groundwaters from the Eastern Desert of Egypt".EARTH AND PLANETARY SCIENCE LETTERS 510(2019):37-44.