Development and application of a method for ivory dating by analyzing radioisotopes to distinguish legal from illegal ivory
| Autor: | Robert Schupfner, Bernhard Durner, David Gehrmeyer, Andreas Schmidberger |
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| Rok vydání: | 2018 |
| Předmět: |
Conservation of Natural Resources
Elephants 010403 inorganic & nuclear chemistry 01 natural sciences Pathology and Forensic Medicine law.invention 03 medical and health sciences 0302 clinical medicine law Animals Humans 030216 legal & forensic medicine Radiocarbon dating Radioisotopes CITES Ivory Forensic Sciences Radiometric Dating Thorium Commerce Poaching Archaeology 0104 chemical sciences Geography visual_art visual_art.visual_art_medium Strontium Radioisotopes Crime Law |
| Zdroj: | Forensic science international. 289 |
| ISSN: | 1872-6283 |
| Popis: | The age determination of elephant ivory provides necessary and crucial information for all criminal prosecution authorities enforcing the Convention on International Trade in Endangered Species of Wild Fauna and Flora. The knowledge of the age of ivory allows to distinguish between pre-convention, hence legal material and ivory deriving from recent, illegal poaching incidents. The commonly applied method to determine the age of ivory is radiocarbon dating in the form of bomb pulse dating, which however will fade out soon. This work provides an enhancement of the radiocarbon dating method by supplementary determination of the isotope profile of 90-Sr and the two thorium isotopes 228-Th and 232-Th. This combined analysis allows for a precise and unambiguous age determination of ivory. We provided calibration curves for all involved radionuclides by analyzing ivory samples with known age and investigated a new method for the extraction of strontium from ivory. |
| Databáze: | OpenAIRE |
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