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Paired 14C and 230Th/U Dating of Surface Corals from the Marquesas and Vanuatu (Sub-Equatorial Pacific) in the 3000 to 15,000 Cal Yr Interval

Published online by Cambridge University Press:  18 July 2016

Martine Paterne ,
Linda K Ayliffe ,
Maurice Arnold ,
Guy Cabioch ,
Nadine Tisnérat-Laborde ,
Christine Hatté ,
Eric Douville  and
Edouard Bard
Martine Paterne*
Affiliation:
Laboratoire des Sciences du Climat et de l'Environnement, Domaine du CNRS, Avenue de la Terrasse, F-91198 Gif sur Yvette, France
Linda K Ayliffe
Affiliation:
Laboratoire des Sciences du Climat et de l'Environnement, Domaine du CNRS, Avenue de la Terrasse, F-91198 Gif sur Yvette, France
Maurice Arnold
Affiliation:
Laboratoire des Sciences du Climat et de l'Environnement, Domaine du CNRS, Avenue de la Terrasse, F-91198 Gif sur Yvette, France Unité Mixte de Service UMS 2572, CEA Saclay, F-91198 Gif sur Yvette, France
Guy Cabioch
Affiliation:
IRD (Institut de Recherche pour le Développement), B.P. A5, 98848 Nouméa cedex, New Caledonia
Nadine Tisnérat-Laborde
Affiliation:
Laboratoire des Sciences du Climat et de l'Environnement, Domaine du CNRS, Avenue de la Terrasse, F-91198 Gif sur Yvette, France
Christine Hatté
Affiliation:
Laboratoire des Sciences du Climat et de l'Environnement, Domaine du CNRS, Avenue de la Terrasse, F-91198 Gif sur Yvette, France
Eric Douville
Affiliation:
Laboratoire des Sciences du Climat et de l'Environnement, Domaine du CNRS, Avenue de la Terrasse, F-91198 Gif sur Yvette, France
Edouard Bard
Affiliation:
CEREGE, Université d'Aix-Marseille III, CNRS UMR-6635, Europôle de l'Arbois, BP80, 13545 Aix-en-Provence cdx4, France
*
Corresponding author. Email: Martine.Paterne@lsce.cnrs-gif.fr.
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Abstract

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Paired radiocarbon and 230Th/U dating was performed on 13 surface corals from submerged reefs in the Marquesas and from raised terraces in Vanuatu. The absolute ages of the corals analyzed ranged from 3000 to 15,000 cal yr. Estimates of the difference between the absolute and 14C ages of these corals are in agreement with previous determinations up until 11,500 cal yr. The resulting mean sea surface reservoir age R is determined at 390 ± 60 yr for the Marquesas region (9°S), which is slightly higher than the R value at 280 ± 50 yr for the Tahiti Islands (18°S). Multiple 14C analyses of 2 corals from the Marquesas present scattered 14C ages at ~12,000 and ~15,100 cal yr. This could be attributed to rapid changes of the 14C content of surface waters around the Marquesas Islands or to a subtle submarine diagenesis.

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. 551 - 566
Copyright
Copyright © The Arizona Board of Regents on behalf of the University of Arizona 

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