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Radiocarbon dating of deep-sea corals

By Jess F. Adkins, Sheila Griffin, Michaele Kashgarian, Hai Cheng, E. R. M. Druffel, E. A. Boyle, R. Lawrence Edwards and Chuan-Chou Shen

Abstract

Deep-sea corals are a promising new archive of paleoclimate. Coupled radiocarbon and U-series dates allow ^(14)C to be used as a tracer of ocean circulation rate in the same manner as it is used in the modern ocean. Diagnetic 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 CO_2. A survey of modern samples from the full Δ^(14)C gradient in the deep ocean demonstrates that the coralline CaCO_3 records the radiocarbon value of the dissolved inorganic carbon

Publisher: University of Arizona
Year: 2002
OAI identifier: oai:authors.library.caltech.edu:33602
Provided by: Caltech Authors

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