ASSESSMENT OF INTERLABORATORY PRETREATMENT PROTOCOLS BY RADIOCARBON DATING AN ELK BONE FOUND BELOW LAACHER SEE TEPHRA AT MIESENHEIM IV (RHINELAND, GERMANY)

作者：Fiedel Stuart J^*; Southon John R; Taylor R E; Kuzmin Yaroslav V; Street Martin; Higham Thomas F G; van der Plicht Johannes; Nadeau Marie Josee; Nalawade Chavan Shweta

来源：Radiocarbon, 2013, 55(2-3): 1443-1453.

DOI：10.1017/S0033822200048372

Four accelerator mass spectrometry (AMS) facilities undertook an interlaboratory exercise designed to examine the reliability and reproducibility of radiocarbon determinations on bone by dating a sample of elk (Alces alces) from Miesenheim IV. This specimen is derived from a secure geological context directly beneath the Laacher See tephra, which provides a precise terminus ante quem of similar to 11,060 yr BP (similar to 13,050 cal yr BP). Regrettably, the results of the intercomparison exercise were complicated by evident contamination of the bone sample by exogenous organic material. This contaminant, probably humic acid, resulted in a wide span of ages (10,010 +/- 30 to 11,100 +/- 45 BP). The only method that yielded an accurate determination, consistent with the age of the tephra, was Oxford%26apos;s single amino acid technique, which targets hydroxyproline. An acid hydrolysis step seems to have been crucial in breaking the bonds between the bone collagen and the contaminant.

• 出版日期2013