Using δ 2 H in human bone collagen to correct for freshwater 14 C reservoir offsets: a pilot study from Shamanka II, Lake Baikal, southern Siberia
| Autor: | Andrzej W. Weber, Christopher Bronk Ramsey, Steve Brookes, Ian Begley, Rick Schulting, Vladimir I. Bazaliiskii, Christophe Snoeck |
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| Přispěvatelé: | Chemistry, History, Archeology, Arts, Philosophy and Ethics, Multidisciplinary Archaeological Research Institute, Analytical, Environmental & Geo-Chemistry |
| Jazyk: | angličtina |
| Rok vydání: | 2018 |
| Předmět: |
010506 paleontology
Archeology Early Neolithic Earth and Planetary Sciences(all) 01 natural sciences law.invention law TheoryofComputation_ANALYSISOFALGORITHMSANDPROBLEMCOMPLEXITY Linear regression Early Bronze Age Radiocarbon dating freshwater reservoir effects 0105 earth and related environmental sciences Trophic level Isotope δ13C Stable isotope ratio fisher-hunter-gatherers 010401 analytical chemistry stable carbon nitrogen and hydrogen isotopes archaeology δ15N Isotopes of nitrogen 0104 chemical sciences General Earth and Planetary Sciences Physical geography Geology |
| Zdroj: | Radiocarbon. 60(5) |
| ISSN: | 1945-5755 0033-8222 |
| Popis: | There is increasing awareness of the need to correct for freshwater as well as marine reservoir effects when undertaking radiocarbon (14C) dating of human remains. Here, we explore the use of stable hydrogen isotopes (δ2H), alongside the more commonly used stable carbon (δ13C) and nitrogen isotopes (δ15N), for correcting 14C freshwater reservoir offsets in 10 paired human-faunal dates from graves at the prehistoric cemetery of Shamanka II, Lake Baikal, southern Siberia. Excluding one individual showing no offset, the average human-faunal offset was 515±175 14C yr. Linear regression models demonstrate a strong positive correlation between δ15N and δ2H ratios, supporting the use of δ2H as a proxy for trophic level. Both isotopes show moderate but significant correlations (r2 ~ 0.45, p < 0.05) with 14C offsets (while δ13C on its own does not), though δ2H performs marginally better. A regression model using all three stable isotopes to predict 14C offsets accounts for approximately 65% of the variation in the latter (r2=0.651, p=0.025), with both δ13C and δ2H, but not δ15N, contributing significantly. The results suggest that δ2H may be a useful proxy for freshwater reservoir corrections, though further work is needed. |
| Databáze: | OpenAIRE |
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