Journal
RADIOCARBON
Volume 44, Issue 2, Pages 567-580Publisher
UNIV ARIZONA DEPT GEOSCIENCES
DOI: 10.1017/S0033822200031921
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Deep-sea corals are a promising new archive of paleoclimate. Coupled radiocarbon and U-series dates allow C-14 to be used as a tracer of ocean circulation rate in the same manner as it is used in the modern ocean. Diagenetic alteration of coral skeletons on the seafloor requires a thorough cleaning of contaminating phases of carbon. In addition, 10% of the coral must be chemically leached prior to dissolution to remove adsorbed modern CO2. A survey of modern samples from the full Delta(14)C gradient in the deep ocean demonstrates that the coralline CaCO3 records the radiocarbon value of the dissolved inorganic carbon.
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