牙本质胶原的氧、氢同位素组成与牙釉质碳酸盐的氧同位素组成密切相关

IF 4.5 1区地球科学 Q1 GEOCHEMISTRY & GEOPHYSICS

Geochimica et Cosmochimica Acta Pub Date : 2025-05-09 DOI:10.1016/j.gca.2025.05.009

L.M. Reynard, M.J. Kohn

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引用次数: 0

摘要

牙齿和骨骼的同位素组成早已被用于生态、环境和考古研究。胶原中的氢和氧同位素越来越多地被用作环境和饮食的示踪剂。然而，胶原蛋白中的氢和氧与牙釉质中的氧之间的同位素关系描述得很少。一项对多种野生大型食草动物的新研究表明，胶原蛋白中的δ18O和δ2H与牙釉质碳酸盐中的δ18O均呈强相关（r2 = 0.96和r2 = 0.86）， δ18O胶原蛋白与δ18O碳酸盐的斜率为0.8，δ2H胶原蛋白与δ18O碳酸盐的斜率为6。鉴于牙釉质碳酸盐岩δ18O通常反映环境水的同位素组成，胶原中的δ2H和δ18O也反映环境水的同位素组成，可以类似地用于牙釉质的环境或饮食研究。

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Oxygen and hydrogen isotope compositions in dentine collagen correlate strongly with oxygen isotope compositions of enamel carbonate

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.

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来源期刊

Geochimica et Cosmochimica Acta 地学-地球化学与地球物理

CiteScore

9.60

自引率

14.00%

发文量

437

审稿时长

6 months

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.