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Pre-Bomb Surface Water Radiocarbon of the Gulf of Mexico and Caribbean as Recorded in Hermatypic Corals

Published online by Cambridge University Press:  18 July 2016

Amy J Wagner*
Affiliation:
Department of Oceanography, Texas A&M University, College Station, Texas 77843, USA Now at: Cooperative Institute for Research in Environmental Sciences, University of Colorado at Boulder and NOAA Paleoclimatology Branch, Boulder, Colorado 80305, USA
Thomas P Guilderson
Affiliation:
Center for Accelerator Mass Spectrometry, Lawrence Livermore National Laboratory, Livermore, California 94551, USA Department of Ocean Sciences, University of California – Santa Cruz, Santa Cruz, California 95064, USA
Niall C Slowey
Affiliation:
Department of Oceanography, Texas A&M University, College Station, Texas 77843, USA
Julia E Cole
Affiliation:
Department of Geosciences, University of Arizona, Tucson, Arizona 85721, USA
*
Corresponding author. Email: amy.wagner@noaa.gov
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Abstract

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Radiocarbon measurements of hermatypic corals from 4 sites in the Gulf of Mexico (GOM) and Caribbean Sea were made to estimate the marine 14C reservoir age (R) and the marine regional correction (ΔR) for this region. Coral skeletal material from the Flower Garden Banks (northern GOM continental shelf), Veracruz, Mexico, and 2 reefs from the Cariaco Basin, Venezuela, were analyzed. Annual and subannual samples from 1945–1955 were milled and 14C composition was determined. In the Gulf of Mexico, average coral Δ14C is −52.6 ± 0.7‰ and average Δ14C for the Cariaco Basin corals is −53.4 ± 0.8‰. Average values for the marine reservoir age and ΔR are computed with this data and compared with results derived from previous measurements made in the same regions. These values are important in calibrating the 14C ages of carbonate samples from the area.

Type
Marine Studies
Copyright
Copyright © 2009 by the Arizona Board of Regents on behalf of the University of Arizona 

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