A contribution to the study of post-depositional alterations of pottery using TL dating analysis |
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| Authors: | Nikolaos Zacharias,Alexander Schwedt,Jaume Buxeda i Garrigó s,Christodoulos T. Michael,Hans Mommsen,Vasilis Kilikoglou |
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| Affiliation: | 1. Laboratory of Archaeometry, Institute of Materials Science, NCSR Demokritos, P. Ioakim, 15 310 Aghia Paraskevi, Attiki, Greece;2. Gruppe Archäometrie, Institut für Strahlen- und Kernphysik, Universität Bonn, Nussallee 14–16, D 53115 Bonn, Germany;3. ERAUB, Dept. de Prehistòria, Història Antiga i Arqueologia, Universitat de Barcelona, C/de Montalegre, 6–8, E-08001 Barcelona, Catalonia, Spain |
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| Abstract: | In luminescence dating, the potassium concentration significantly contributes to the dose rate value in the age estimation. Within this study, fine-grain thermoluminescence dating has been applied on sherds of calcareous pottery of known age, excavated at a Roman site in Mallorca, Spain. For those of the samples that showed signs of severe potassium leaching, according to chemical and mineralogical examination, the thermoluminescence analysis provided overestimated dates. By using the known archaeological age of the samples, a corrected dose rate value can be estimated which provides the potassium concentration averaged for the burial period. Finally, a step-like model can then be used to estimate the fraction of the burial period after which most of the alteration effects took place. |
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| Keywords: | Luminescence Thermoluminescence Alteration Age overestimation K-leaching Over-firing Archaeological pottery |
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