<abstract xml:lang="en" xmlns="http://www.w3.org/1999/xhtml"><p>Two independent geochronologic radiometric methods: 137Cs and 210Pb were used to determine the sedimentation rate and subsequently to date the oldest sediments of a 50 cm core containing unconsolidated sediments collected at a depth of 600 m below sea surface in the anoxic zone of the Western Black Sea, off the Romanian town of Constanta. Both methods gave coincident value within experimental uncertainties of 0.42±0.20 mm·y−1 for 137Cs and 0.49±0.03 mm·y−1 in the case of 210Pb, within the Constant Initial Concentration model, which gave for the lower most sediments an age of 1.00±0.01 ka. The constant sedimentation model as well as the possible causes of observed discrepancy between experimental uncertainties are discussed.</p></abstract>

Two independent geochronologic radiometric methods: 137Cs and 210Pb were used to determine the sedimentation rate and subsequently to date the oldest sediments of a 50 cm core containing unconsolidated sediments collected at a depth of 600 m below sea surface in the anoxic zone of the Western Black Sea, off the Romanian town of Constanta. Both methods gave coincident value within experimental uncertainties of 0.42±0.20 mm·y−1 for 137Cs and 0.49±0.03 mm·y−1 in the case of 210Pb, within the Constant Initial Concentration model, which gave for the lower most sediments an age of 1.00±0.01 ka. The constant sedimentation model as well as the possible causes of observed discrepancy between experimental uncertainties are discussed.

Concordant 210Pb and 137Cs ages of black sea anoxic unconsolidated sediments

Department of Atomic and Nuclear Physics, University of Bucharest, P.O. Box MG-11, 077125, Magurele (Ilfov), Romania

National Institute for Marine Geology and Geoecology, 34 Dimitrie Onciul str., 024504, Bucharest, Romania

Geochronometria

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

{"article-title":"Concordant 210Pb and 137Cs ages of black sea anoxic unconsolidated sediments"}

Two independent geochronologic radiometric methods: 137Cs and 210Pb were used to determine the sedimentation rate and subsequently to date the oldest sediments...

Concordant 210Pb and 137Cs ages of black sea anoxic unconsolidated sediments

Publié en ligne: 20 mars 2011

Pages: 101 - 106

DOI: https://doi.org/10.2478/s13386-011-0022-9

Mots clés
Black Sea, anoxic sediments, 137Cs, 210Pb, absolute age, sedimentation rate

© 2011 Silesian University of Technology, Gliwice, Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Concordant 210Pb and 137Cs ages of black sea anoxic unconsolidated sediments

Publié en ligne: 20 mars 2011

Pages: 101 - 106

DOI: https://doi.org/10.2478/s13386-011-0022-9

Mots clésBlack Sea, anoxic sediments, 137Cs, 210Pb, absolute age, sedimentation rate

© 2011 Silesian University of Technology, Gliwice, Poland

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Mots clés
Black Sea, anoxic sediments, 137Cs, 210Pb, absolute age, sedimentation rate