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Near-Zero Δ14C Values at 32 kyr cal BP Observed in the High-Resolution 14C Record from U-Th Dated Sediment of Lake Lisan

Published online by Cambridge University Press:  18 July 2016

K van der Borg ,
M Stein ,
A F M de Jong ,
N Waldmann  and
S L Goldstein
K van der Borg*
Affiliation:
Department of Physics and Astronomy, Utrecht University, Netherlands
M Stein
Affiliation:
Geological Survey of Israel, Jerusalem, Israel
A F M de Jong
Affiliation:
Department of Physics and Astronomy, Utrecht University, Netherlands
N Waldmann
Affiliation:
Institute of Earth Sciences, Hebrew University, Jerusalem, Israel
S L Goldstein
Affiliation:
Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York 10964, USA.
*
Corresponding author. Email: [email protected].
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Abstract

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A high-resolution atmospheric radiocarbon record has been obtained for the interval of 17–36 kyr from U/Th-dated aragonite sediment of Lake Lisan. Reservoir age corrections were applied with reservoir ages of 200, 1250, and 2000 yr, which correlate with the different water levels of the lake. The present 14C record for Lake Lisan shows near resemblance with that of Lake Suigetsu: both converge to the value of Δ14C ∼0‰ at 32 kyr cal BP. Both also show significant differences compared to other reported high-resolution 14C records (e.g. Iceland Sea, Cariaco basin, and Bahamas speleothem). This inconsistency should be addressed by re-assessment of the basic assumptions behind the determination of calendar ages of the various records.

Type
Part II
Information
Radiocarbon , Volume 46 , Issue 2: Proceedings of the 18th International Radiocarbon Conference (Part 2 of 2), Conference Editors: Nancy Beavan Athfield, Rodger J Sparks , 2004 , pp. 785 - 795
Copyright
Copyright © The Arizona Board of Regents on behalf of the University of Arizona 

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