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Testing the “Dicarb Problem”: A Case Study from North Alaska

Published online by Cambridge University Press:  18 July 2016

Joshua D Reuther  and
S Craig Gerlach
Joshua D Reuther*
Affiliation:
Northern Land Use Research, Inc., 600 University Ave., Suite 6, Fairbanks, Alaska 99708, USA
S Craig Gerlach
Affiliation:
Department of Chemistry and Biochemistry, Department of Anthropology, P.O. Box 757720, University of Alaska, Fairbanks, Alaska 99775-7720, USA
*
Corresponding author. Email: [email protected].
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Abstract

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An assumption exists in North Alaskan archaeological literature that radiometric assays produced by the now-defunct Dicarb Radioisotope Co. (Dicarb) are “too young” or more recent when compared to those produced by other laboratories. This assumption is statistically tested by comparing radiocarbon assays produced by Dicarb to those produced by Beta Analytic, Inc.; Geochron Laboratories; and the NSF-Arizona AMS Facility. The primary data set consists of radiometric and accelerator mass spectrometry (AMS) assays produced from materials excavated at the Croxton site, Locality J, Tukuto Lake, northern Alaska. Statistical analyses demonstrate that 14C assays produced by Dicarb tend to be “younger” than assays produced by other laboratories on crosscheck samples, with differences ranging between 350 and 1440 yr.

Type
Articles
Information
Radiocarbon , Volume 47 , Issue 3 , 2005 , pp. 359 - 366
Copyright
Copyright © 2005 by the Arizona Board of Regents on behalf of the University of Arizona 

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