Compound-specific radiocarbon dating of lipid residues in pottery vessels: a new approach for detecting the exploitation of marine resources - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2022

Compound-specific radiocarbon dating of lipid residues in pottery vessels: a new approach for detecting the exploitation of marine resources

Résumé

Over the last decades, organic residue analysis has been shown to be especially useful in ancient diet reconstruction; however, it is only recently that the direct radiocarbon dating of lipid residues has become a reliable method for dating pottery vessels and food procurement activities. We applied lipid residue analysis to late Bronze Age pottery vessels from the site of Cliffs End Farm (UK), previously dated by their visible charred residues and dated four of these vessels by compound-specific radiocarbon analysis (CSRA) of their absorbed lipids. Lipid biomarker detection was limited to only one class of aquatic biomarker in four vessels, which indicated that the diet relied mainly on terrestrial animals. Four vessels datable from their absorbed lipids produced 14C measurements significantly older than those on the charred residues, suggesting a reservoir effect affecting the dated lipids. Furthermore, the low abundance of pig remains (1-4%) at the site suggests that enriched δ13C16:0 and 13C18:0 values recorded on the absorbed fatty acids were caused by marine contributions. The percentage of marine products in the CSRA dated vessels was quantified using the δ13C values of individual fatty acids and from a modern reference database. These percentages were incorporated in mixed-source radiocarbon calibration using OxCal for the correction of a marine reservoir effect. Therefore, the combination of lipid compositions, radiocarbon dates and faunal analyses enabled the identification of marine product exploitation at the site. Finally, this allowed comparisons to be made with the dates of charred residues obtained from the same sherds.

Domaines

Géochimie
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Dates et versions

hal-03987370 , version 1 (14-02-2023)

Identifiants

  • HAL Id : hal-03987370 , version 1

Citer

Emmanuelle Casanova, Timothy Knowles, Alex Bayliss, Caitlin Walton-Doyle, Alistair Barclay, et al.. Compound-specific radiocarbon dating of lipid residues in pottery vessels: a new approach for detecting the exploitation of marine resources. International radiocarbon conference, Sep 2022, Zurich (CH), Switzerland. ⟨hal-03987370⟩
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