{"title":"Oxygen and hydrogen isotope compositions in dentine collagen correlate strongly with oxygen isotope compositions of enamel carbonate","authors":"L.M. Reynard, M.J. Kohn","doi":"10.1016/j.gca.2025.05.009","DOIUrl":null,"url":null,"abstract":"The isotopic composition of tooth and bone has long been exploited in ecological, environmental, and archaeological studies. Increasingly, hydrogen and oxygen isotopes in collagen are used as tracers of environment and diet. However, the isotopic relationship between hydrogen and oxygen in collagen and oxygen in tooth enamel is poorly described. A new investigation of varied wild large herbivores shows that δ<ce:sup loc=\"post\">18</ce:sup>O and δ<ce:sup loc=\"post\">2</ce:sup>H in collagen are both strongly correlated to δ<ce:sup loc=\"post\">18</ce:sup>O in tooth enamel carbonate (r<ce:sup loc=\"post\">2</ce:sup> = 0.96 and r<ce:sup loc=\"post\">2</ce:sup> = 0.86, respectively), with a δ<ce:sup loc=\"post\">18</ce:sup>O collagen vs. δ<ce:sup loc=\"post\">18</ce:sup>O carbonate slope ∼ 0.8 and a δ<ce:sup loc=\"post\">2</ce:sup>H collagen vs. δ<ce:sup loc=\"post\">18</ce:sup>O carbonate slope ∼ 6. Given that enamel carbonate δ<ce:sup loc=\"post\">18</ce:sup>O generally reflects environmental water isotopic composition, δ<ce:sup loc=\"post\">2</ce:sup>H and δ<ce:sup loc=\"post\">18</ce:sup>O in collagen also reflect isotopic compositions in environmental water and may be used analogously to tooth enamel for environmental or dietary studies.","PeriodicalId":327,"journal":{"name":"Geochimica et Cosmochimica Acta","volume":"9 1","pages":""},"PeriodicalIF":4.5000,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Geochimica et Cosmochimica Acta","FirstCategoryId":"89","ListUrlMain":"https://doi.org/10.1016/j.gca.2025.05.009","RegionNum":1,"RegionCategory":"地球科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"GEOCHEMISTRY & GEOPHYSICS","Score":null,"Total":0}
引用次数: 0
Abstract
The isotopic composition of tooth and bone has long been exploited in ecological, environmental, and archaeological studies. Increasingly, hydrogen and oxygen isotopes in collagen are used as tracers of environment and diet. However, the isotopic relationship between hydrogen and oxygen in collagen and oxygen in tooth enamel is poorly described. A new investigation of varied wild large herbivores shows that δ18O and δ2H in collagen are both strongly correlated to δ18O in tooth enamel carbonate (r2 = 0.96 and r2 = 0.86, respectively), with a δ18O collagen vs. δ18O carbonate slope ∼ 0.8 and a δ2H collagen vs. δ18O carbonate slope ∼ 6. Given that enamel carbonate δ18O generally reflects environmental water isotopic composition, δ2H and δ18O in collagen also reflect isotopic compositions in environmental water and may be used analogously to tooth enamel for environmental or dietary studies.
期刊介绍:
Geochimica et Cosmochimica Acta publishes research papers in a wide range of subjects in terrestrial geochemistry, meteoritics, and planetary geochemistry. The scope of the journal includes:
1). Physical chemistry of gases, aqueous solutions, glasses, and crystalline solids
2). Igneous and metamorphic petrology
3). Chemical processes in the atmosphere, hydrosphere, biosphere, and lithosphere of the Earth
4). Organic geochemistry
5). Isotope geochemistry
6). Meteoritics and meteorite impacts
7). Lunar science; and
8). Planetary geochemistry.