<html>Developing a Quality Control Protocol for Assessing Diagenesis Using δ<sup>18</sup>O in Carbonates and Phosphates from Human Bone and Tooth Hydroxyapatite</html>
Author(s): Monica Warner
Year: 2025
Summary
This is an abstract from the "SAA 2025: Individual Abstracts" session, at the 90th annual meeting of the Society for American Archaeology.
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Stable oxygen isotope (δ<sup>18</sup>O) analysis of the carbonate fraction in human tooth and bone hydroxyapatite is well-established in archaeology. Researchers use δ<sup>18</sup>O values in human bone and tooth bioapatite to reconstruct migration, climate, and water sources. Bioavailable stable oxygen isotopes of carbonates and phosphates originate from the same body water pool and should reflect similar environmental conditions in obligate drinkers with a linear relationship. However, deviations from this expected relationship in archaeological hydroxyapatite can indicate diagenetic alteration, potentially leading to inaccurate temperature, water source, and geographic locations. Previous studies have estimated the offset between δ<sup>18</sup>O in carbonates and phosphates (Δ<sup>18</sup>Oc-p) for enamel in various mammalian species, but not for humans. This study explores the Δ<sup>18</sup>Oc-p values derived from modern and archaeological human bone and tooth hydroxyapatite, coupled with crystallinity indexes and carbonate-phosphate ratios derived from FTIR data. The goal is to establish a quality control protocol to assess potential diagenesis and determine the reliability of δ<sup>18</sup>O values obtained from human archaeological hard tissues.
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Cite this Record
Developing a Quality Control Protocol for Assessing Diagenesis Using δ18O in Carbonates and Phosphates from Human Bone and Tooth Hydroxyapatite. Monica Warner. Presented at The 90th Annual Meeting of the Society for American Archaeology. 2025 ( tDAR id: 511221)
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Record Identifiers
Abstract Id(s): 53734