DOI: 10.1016/j.epsl.2018.02.003
Scopus记录号: 2-s2.0-85044732582
论文题名: Salt precipitation and dissolution in the late Quaternary Dead Sea: Evidence from chemical and δ37Cl composition of pore fluids and halites
作者: Levy E.J. ; Yechieli Y. ; Gavrieli I. ; Lazar B. ; Kiro Y. ; Stein M. ; Sivan O.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 487 起始页码: 127
结束页码: 137
语种: 英语
英文关键词: Dead Sea
; halite dissolution
; halite precipitation
; ICDP
; Mount Sedom salt diapir
; δ37Cl
Scopus关键词: Curve fitting
; Dissolution
; Distillation
; Glacial geology
; Lakes
; Precipitation (chemical)
; Reservoirs (water)
; Salt tectonics
; Sodium chloride
; Chemical compositions
; Dead sea
; Fractionation factors
; ICDP
; Rayleigh distillation
; Residual solutions
; Salt diapirs
; Salt precipitation
; Chloride minerals
; chemical composition
; chlorine isotope
; dissolution
; fluid composition
; fractionation
; halite
; hydrochemistry
; precipitation (chemistry)
; Quaternary
; reservoir
; salt dome
; Dead Sea
; Israel
; Mount Sedom
; Southern District
英文摘要: The chemical composition and δ37Cl of pore fluids from the ICDP core drilled in the deepest floor of the terminal and hypersaline Dead Sea, and halites from the adjacent Mount Sedom salt diapir, are used to establish the dynamics of halite precipitation and dissolution during the last interglacial and glacial periods. Between ∼132 and 116 thousand years ago (ka) halites precipitated in the lake resulting in the expulsion of Na+ and Cl− from the residual solution. Over 50% of the Cl− reservoir was removed, resulting in a decrease in the Na/Cl ratio from 0.57 to 0.19. This process was accompanied by a decrease in δ37Cl values in the precipitating halites and the associated residual Cl− in the lake. The observed decrease fits a Rayleigh distillation curve with a fractionation factor of Δ(NaCl–Dead Sea solution) = +0.32‰ (±0.12) determined in the present study. This behavior implies negligible contribution of external sources of Cl− to the lake during the main peak of the last interglacial, MIS5e. Subsequently, during the last glacial (ca. 117 to 17 ka) dissolution of halite took place, the Na+ and Cl− inventory were replenished, accompanied by an increase in Na/Cl from 0.21 to 0.55 and in the δ37Cl values from −0.46‰ to −0.12‰. While the lake underwent significant dilution during that time, the decrease in salinity was somewhat suppressed by the dissolution of the halite which was mostly derived from Mount Sedom salt diapir. © 2018 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110011
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Department of Geological and Environmental Sciences, Ben-Gurion University of the Negev, Beer Sheva, Israel; Geological Survey of Israel, 30 Malkhe Israel St., Jerusalem, 95501, Israel; Department of Hydrology and Microbiology, Zuckerberg Center, Ben-Gurion University of the Negev, Sede Boker, Israel; Institute of Earth Sciences, The Hebrew University, Givat Ram, Jerusalem, 91904, Israel; Lamont-Doherty Earth Observatory, 61 Route 9W, PO Box 1000, Palisades, NY 10964, United States
Recommended Citation:
Levy E.J.,Yechieli Y.,Gavrieli I.,et al. Salt precipitation and dissolution in the late Quaternary Dead Sea: Evidence from chemical and δ37Cl composition of pore fluids and halites[J]. Earth and Planetary Science Letters,2018-01-01,487