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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

  • Martine Paterne (a1), Linda K Ayliffe (a1), Maurice Arnold (a1) (a2), Guy Cabioch (a3), Nadine Tisnérat-Laborde (a1), Christine Hatté (a1), Eric Douville (a1) and Edouard Bard (a4)...

Abstract

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.

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Copyright

Corresponding author

Corresponding author. Email: Martine.Paterne@lsce.cnrs-gif.fr.

References

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Radiocarbon
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