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Radiocarbon Dating of Deep-Sea Corals

Published online by Cambridge University Press:  18 July 2016

Jess F Adkins
Affiliation:
MIT/WHOI Joint Program in Oceanography. Now at California Institute of Technology, MS 100-23, 1200 E California Blvd., Pasadena, California 91125 USA. Email: jess@gps.caltech.edu.
Shelia Griffin
Affiliation:
University of California at Irvine, Department of Earth System Science, Irvine, California 92697-3100 USA
Michaele Kashgarian
Affiliation:
Center for Accelerator Mass Spectrometry L-397, Lawrence Livermore National Laboratory, PO Box 808, 7000 East Avenue, Livermore, California 94550 USA
Hai Cheng
Affiliation:
Dept. of Geology and Geophysics, University of Minnesota, 310 Pillsbury Drive SE, Minneapolis, Minnesota 55455 USA
E R M Druffel
Affiliation:
University of California at Irvine, Department of Earth System Science, Irvine, California 92697-3100 USA
E A Boyle
Affiliation:
Dept. of Earth, Atmosphere and Planetary Sciences, MIT, E34-200, Cambridge, Massachusetts 02139 USA
R Lawrence Edwards
Affiliation:
Dept. of Geology and Geophysics, University of Minnesota, 310 Pillsbury Drive SE, Minneapolis, Minnesota 55455 USA
Chuan-Chou Shen
Affiliation:
Dept. of Geology and Geophysics, University of Minnesota, 310 Pillsbury Drive SE, Minneapolis, Minnesota 55455 USA
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Abstract

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Deep-sea corals are a promising new archive of paleoclimate. Coupled radiocarbon and U-series dates allow 14C 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 δ14C gradient in the deep ocean demonstrates that the coralline CaCO3 records the radiocarbon value of the dissolved inorganic carbon.

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Articles
Copyright
Copyright © 2002 The Arizona Board of Regents on behalf of the University of Arizona 

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