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Variation of U-microdistribution in fossil Hipparion teeth as a complicating factor in dating studies

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Abstract

Five Upper Miocene fossil Hipparion molars were studied for U-distribution by Fission Track. U uptake has reached the whole mass of the teeth and no saturation fronts seem to occur in the interior layers. Mean U-concentration in dentine, cement and enamel was 157, 139 and 78 ppm, respectively. Uenamel/Udentine ≈ 0.5 is considerably higher than 0.1 reported in the past for Upper-Quaternary mammoth teeth. These features are disadvantageous for ESR-dating in Hipparion enamel, although a long-lived signal (g=2.0018) is apparent. Leaching phenomena occur in the outer regions of these teeth. Inner enamel folding seems to have hindered a more uniform U-distribution in the teeth.

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Authors and Affiliations

  1. Laboratory of Archaeometry, N.R.C.S. “Demokritos”, 153 10, Aghia Paraskevi Attikis, (Greece)

    Y. Bassiakos

  2. Subfaculty of Earth Sciences, Department of Historical Geology and Paleontology, University of Athens, Panepistimiopolis, 157 84, Zografou, (Greece)

    A. Athanassiou, S. Roussiakis & G. Theodorou

Authors
  1. Y. Bassiakos
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  2. A. Athanassiou
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  3. S. Roussiakis
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  4. G. Theodorou
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Bassiakos, Y., Athanassiou, A., Roussiakis, S. et al. Variation of U-microdistribution in fossil Hipparion teeth as a complicating factor in dating studies. Journal of Radioanalytical and Nuclear Chemistry, Articles 158, 239–250 (1992). https://doi.org/10.1007/BF02047111

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  • DOI: https://doi.org/10.1007/BF02047111

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