D / H ratios of fluid inclusions of Soreq cave (Israel) speleothems as a guide to the Eastern Mediterranean Meteoric Line relationships in the last 120 ky

D / H ratios of fluid inclusions of Soreq cave (Israel) speleothems as a guide to the Eastern... D / H studies of fluid inclusions of speleothems of the Soreq cave (Israel) are made using the method of vacuum thermal extraction. D / H measurements of present-day carbonate pool margins and waters show that the value of the vacuum thermal extraction fractionation Δ ex (=δ D extracted water −δ D cave water ) is −30.0±1.4‰ for the Soreq cave deposits. D / H analyses of fluid inclusions of two fossil speleothems formed during periods equivalent to glacial times suggest that their isotopic compositions follow the global Meteoric Water Line (MWL) δ D– δ 18 O relationship, compared to present-day waters which follow the Mediterranean Meteoric Water Line (MMWL) trend. Two samples from interglacial periods show isotopic trends between these lines. These differences are presumed to reflect cooler less evaporative conditions in the Eastern Mediterranean Sea during glacial times. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Chemical Geology Elsevier

D / H ratios of fluid inclusions of Soreq cave (Israel) speleothems as a guide to the Eastern Mediterranean Meteoric Line relationships in the last 120 ky

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Publisher
Elsevier
Copyright
Copyright © 2000 Elsevier Science B.V.
ISSN
0009-2541
eISSN
1872-6836
D.O.I.
10.1016/S0009-2541(99)00192-8
Publisher site
See Article on Publisher Site

Abstract

D / H studies of fluid inclusions of speleothems of the Soreq cave (Israel) are made using the method of vacuum thermal extraction. D / H measurements of present-day carbonate pool margins and waters show that the value of the vacuum thermal extraction fractionation Δ ex (=δ D extracted water −δ D cave water ) is −30.0±1.4‰ for the Soreq cave deposits. D / H analyses of fluid inclusions of two fossil speleothems formed during periods equivalent to glacial times suggest that their isotopic compositions follow the global Meteoric Water Line (MWL) δ D– δ 18 O relationship, compared to present-day waters which follow the Mediterranean Meteoric Water Line (MMWL) trend. Two samples from interglacial periods show isotopic trends between these lines. These differences are presumed to reflect cooler less evaporative conditions in the Eastern Mediterranean Sea during glacial times.

Journal

Chemical GeologyElsevier

Published: May 22, 2000

References

  • Carbon and oxygen isotope study of the active water–carbonate system in a karstic Mediterranean cave: implications for paleoclimate research in semiarid regions
    Bar-Matthews, M.; Ayalon, A.; Matthews, A.; Sass, E.; Halicz, L.
  • The Eastern Mediterranean paleoclimate as a reflection of regional events: Soreq cave, Israel
    Bar-Matthews, M.; Ayalon, A.; Kaufman, A.; Wasserburg, G.J.
  • Oxygen isotope fractionation of divalent metal carbonates
    O'Neil, J.R.; Clayton, R.N.; Mayeda, T.K.

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