不同的人类骨改造速率和影响地质分析同位素的时间分辨率
Rhonda L Quinn1, Melanie M Beasley2, Timothy P Gocha3
1School of Earth, Environment & Society, Bowling Green State University, Bowling Green, OH 43403, United States.
Forensic science international
|April 1, 2025
概括
骨重塑率 (RMRs) 在人类骨元素中显著不同,影响同位素分析的时间分辨率. 了解这些RMR对于准确的法医和饮食重建至关重要.
科学领域:
- 法医人类学 法医人类学
- 同位素地球化学 同位素地球化学
- 骨生物学 骨生物学
背景情况:
- 对人类骨遗骸的同位素分析为法医识别提供了重要的饮食和居住信息.
- 骨重塑率 (RMRs) 影响同位素数据的时间尺度,但大多数人类骨的RMRs没有得到很好的量化.
- 多样化的RMR复杂地解释了居住的流动性和饮食变化从骨同位素.
研究的目的:
- 估计各种人类骨元素,结构和原/生物酸盐相的RMR.
- 评估来自不同骨位置的同位素数据的时间分辨率.
- 为了在法医人类学中更准确地解释饮食和居住.
主要方法:
- 利用已知死者报告的现代放射性碳 (F14C) 值.
- 来自大腿骨,骨,肋骨,骨,头骨和脊椎元件的皮层和骨骨,原和生物酸盐阶段的估计RMR.
- 使用非参数统计比较来确定RMR的显著差异.
主要成果:
- 在骨元素和阶段之间观察到RMR的显著差异,脊椎带显示最高的RMR (14.3%/年),股骨皮层显示最低的RMR (3.3%/年).
- 骨原 (3.7%/年) 和生物酸 (5.0%/年) 呈现出明显的RMR,这表明组合时可能发生时间尺度混合.
- 所有皮层结构的周转间隔都超过了20年,表明同位素值可能代表比以前假设的更短的生命周期.
结论:
- 量化的RMR显示了骨周转率的显著变化,影响了同位素分析的时间分辨率.
- 结合原和生物酸盐数据可能会混不同的时间尺度,需要仔细的模型构建.
- 需要进一步的研究,整合组织形态测量和放射性碳测年法,以完善用于法医应用的骨同位素的时间分辨率.
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