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COMPOUND-SPECIFIC RADIOCARBON, STABLE CARBON ISOTOPE AND BIOMARKER ANALYSIS OF MIXED MARINE/TERRESTRIAL LIPIDS PRESERVED IN ARCHAEOLOGICAL POTTERY VESSELS
Radiocarbon ( IF 2.0 ) Pub Date : 2020-03-16 , DOI: 10.1017/rdc.2020.11 Emmanuelle Casanova , Timothy D J Knowles , Candice Ford , Lucy J E Cramp , Niall Sharples , Richard P Evershed
Radiocarbon ( IF 2.0 ) Pub Date : 2020-03-16 , DOI: 10.1017/rdc.2020.11 Emmanuelle Casanova , Timothy D J Knowles , Candice Ford , Lucy J E Cramp , Niall Sharples , Richard P Evershed
At archaeological sites located on islands or near the coast, the potential exists for lipid extracts of potsherds to contain fatty acids (FA) from both aquatic and terrestrial organisms, meaning that consideration must be given to marine reservoir effects (MRE) in radiocarbon (14 C) analyses. Here we studied the site of Bornais (Outer Hebrides, UK) where a local MRE, ΔR of –65 ± 45 yr was determined through the paired 14 C determinations of terrestrial and marine faunal bones. Lipid analysis of 49 potsherds, revealed aquatic biomarkers in 45% of the vessels, and δ13 C values of C16:0 and C18:0 FAs revealed ruminant and marine product mixing for 71% of the vessels. Compound-specific 14 C analysis (CSRA) of FAs yielded intermediate 14 C ages between those of terrestrial and marine bones from the same contexts, confirming an MRE existed. A database containing δ13 C values for FAs from reference terrestrial and marine organisms provided endmembers for calculating the percentage marine-derived C (% marine ) in FAs. We show that lipid 14 C dates can be corrected using determined % marine and ΔR values, such that pottery vessels from coastal locations can be 14 C dated by CSRA of FAs.
中文翻译:
保存在考古陶器中的混合海洋/陆地脂质的化合物特异性放射性碳、稳定碳同位素和生物标志物分析
在位于岛屿或海岸附近的考古遗址,陶片的脂质提取物可能含有来自水生和陆生生物的脂肪酸(FA),这意味着必须考虑放射性碳中的海洋储层效应(MRE)。14 C) 分析。在这里,我们研究了 Bornais(英国外赫布里底群岛)的地点,通过配对确定当地 MRE,ΔR 为 –65 ± 45 yr14 C 陆地和海洋动物骨骼的测定。对 49 个陶片进行脂质分析,发现 45% 的容器中有水生生物标志物,而 δ13 C 的 C 值16:0 和 C18:0 FAs 显示 71% 的船只有反刍动物和海产品混合。化合物特异性14 FA 的 C 分析 (CSRA) 产生中间体14 来自相同环境的陆地和海洋骨骼之间的 C 年龄,证实了 MRE 的存在。包含 δ 的数据库13 来自参考陆地和海洋生物的 FA 的 C 值提供了计算海洋衍生 C 百分比的端元(% 海洋 ) 在 FA 中。我们证明了脂质14 C 日期可以使用确定的更正% 海洋 和 ΔR 值,这样沿海地区的陶器可以14 C 由 FA 的 CSRA 注明日期。
更新日期:2020-03-16
中文翻译:
保存在考古陶器中的混合海洋/陆地脂质的化合物特异性放射性碳、稳定碳同位素和生物标志物分析
在位于岛屿或海岸附近的考古遗址,陶片的脂质提取物可能含有来自水生和陆生生物的脂肪酸(FA),这意味着必须考虑放射性碳中的海洋储层效应(MRE)。