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AMS 14C Dating of Human Bones Using Sequential Pyrolysis and Combustion of Collagen

Published online by Cambridge University Press:  18 July 2016

Hong Wang ,
Stanley H Ambrose ,
Kristin M Hedman  and
Thomas E Emerson
Hong Wang
Affiliation:
Illinois State Geological Survey, Institute of Natural Resource Sustainability, University of Illinois at Urbana-Champaign, Champaign, Illinois 61820, USA.
Stanley H Ambrose
Affiliation:
Department of Anthropology, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA.
Kristin M Hedman
Affiliation:
Illinois State Archeological Survey, Institute of Natural Resource Sustainability, University of Illinois at Urbana-Champaign, Champaign, Illinois 61820, USA.
Thomas E Emerson
Affiliation:
Illinois State Archeological Survey, Institute of Natural Resource Sustainability, University of Illinois at Urbana-Champaign, Champaign, Illinois 61820, USA.
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Abstract

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The Radiocarbon Dating Laboratory at the University of Illinois has been using the pyrolysis-combustion technique to separate pyrolysis-volatile (Py-V) or low molecular weight and pyrolysis-residue (Py-R) or high molecular weight compounds for 14C dating of organic remains since 2003. We have applied this method to human collagen dating to examine the 14C age difference between low and high molecular weight organic compounds. Results show that both fractions of late prehistoric period human bones from Illinois archaeological sites yield identical 14C dates but that Py-V or low molecular weight fractions of Archaic period human bones appear to be slightly contaminated. In this case, Py-V components or low molecular weight collagen fraction yield older 14C dates, which could result from contamination from old organic-rich sediments. The pyrolysis-combustion technique provides an economical alternative method to date bones that have not been satisfactorily dated using conventional purification techniques.

Type
Methods, Applications, and Developments
Information
Radiocarbon , Volume 52 , Issue 1 , 2010 , pp. 157 - 163
Copyright
Copyright © 2010 by the Arizona Board of Regents on behalf of the University of Arizona 

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