Radiocarbon dating of bone apatite by step heating


However, this is still excessive for two classes of bone remains: (1) individual bones of small vertebrates which often weigh less than 60 mg; and (2) unique remains such as hominid bones or worked bone artefacts for which curators do not permit invasive sampling and is seldom reported in publications, even when supplementary information is available (see for example refs 16,17,18,19).However, careful examination of the literature suggests that attempts at dating samples smaller than 60 mg are rare.The advent of accelerator mass spectrometers (AMS) in the eighties revolutionized the field of archaeology by allowing smaller samples to be measured.While it decreases the amount of carbon required for a radiocarbon measurement by several orders of magnitude, the AMS dating of bone collagen still requires at least 60–200 mg of bone, depending on the protein preservation and the extraction protocol.While the exchange of inorganic carbon occurs much more readily, the relative chemical inertness of biopolymers makes them ideal for dating; therefore, the majority of bone radiocarbon dates are obtained from the collagen phase.The chemical integrity of this biomolecule can be assessed using simple biochemical criteria such as %C, %N and C/N ratio.An optimized protocol allowed us to extract enough material to produce between 0.2 and 1.0 mg of carbon for graphite targets.



The method was then applied to two archaeological sites where the single bones of small mammals were AMS-dated, and the dates compared to standard-size bone samples found in the near vicinity.

In effect, they provide us with windows to past societies, and contribute to our knowledge of ancient human evolution and cultural development.



Radiocarbon dating of bone apatite by step heating comments


  • Radiocarbon dating of bone apatite by step heating - Wiley Online. profil de paulette60

    paulette60

    BATCH. Radiocarbon Dating of Bone Apatite by. Step Heating. Todd A. Surovell. Department of Anthropology, University of Arizona, Tucson, Arizona 85721. Many advances have been made in radiocarbon dating of bone organics, but research on 14C dating of bone inorganic carbon has lagged significantly behind.…
  • Radiocarbon dating minute amounts of bone 3–60 mg with. profil de paulette60

    paulette60

    Aug 2, 2017. Here, we present the first radiocarbon dates obtained from minute amounts of bone 3–60 mg using a MIni CArbon DAting System MICADAS. Hard tissues contain an organic phase mainly the protein collagen type I embedded in a mineral phase made of a non-stoichiometric biogenic apatite.…
  • DETERMINING THE RELIABILITY OF RADIOCARBON AGE FROM. profil de paulette60

    paulette60

    The study of the radiocarbon age of bone bioapatite was initiated by necessity to date archaeological artifacts. Since the early days of radiocarbon dating, the analysis of bone material has been a problem due to. secondary carbonates, i.e. by heating in an oxygen atmosphere in specific steps to separate of CO2.…
  • Radiocarbon dating of bone apatite by step heating - Surovell - 2000. profil de paulette60

    paulette60

    Using mammoth bone, enamel, and tusk from the Dent and Murray Springs Clovis sites, experiments with the Haas and Banewicz technique of bone apatite dating by step heating demonstrate that accurate radiocarbon ages can be produced from bone apatite carbonate. Furthermore, preliminary findings suggest a.…
  • Radiocarbon Dating of Bone Apatite by Step Heating - CiteSeerX profil de paulette60

    paulette60

    Dating of bone inorganic carbon has lagged significantly behind. Using mammoth bone, enamel, and tusk from the Dent and Murray Springs Clovis sites, experiments with the Haas and Banewicz technique of bone apatite dating by step heating demonstrate that accurate radiocarbon ages can be produced from bone.…