建立厄瓜多尔的异地图:基线数据在火山景观中的重要性
Sara L Juengst1, María Patricia Ordoñez Alvarez2
1Department of Anthropology, University of North Carolina at Charlotte, Charlotte, USA.
American journal of biological anthropology
|June 23, 2025
概括
厄瓜多尔的同位素 (87Sr/86Sr) 分析揭示了区域差异,表明基于秘鲁数据的现有预测模型不适合这个独特的地质区域. 为了准确地追踪考古迁移,需要进一步的基线研究.
科学领域:
- 考古学科学 考古学科学
- 同位素地球化学 同位素地球化学
- 生物考古学的生物考古学
背景情况:
- 同位素 (Sr/Sr) 对于追踪过去的人类和动物迁徙至关重要.
- 现有的南美异地图主要基于来自秘鲁和安第斯山脉的数据,在厄瓜多尔有一个差距.
- 目前正在使用预测模型和地质研究来估计厄瓜多尔基线,这可能导致不准确.
研究的目的:
- 测试厄瓜多尔的预测考古和地质模型的准确性.
- 为了确定厄瓜多尔的初始基线同位素数据.
- 评估以秘鲁为基础的模型是否适用于厄瓜多尔的考古学石研究.
主要方法:
- 从厄瓜多尔沿海和北部高地地区的八个考古遗址收集了11个动物样本.
- 在具有狭窄的家园范围的动物样本中分析87Sr/86Sr比率.
- 在北卡罗来纳大学查普尔山分校进行的样本处理.
主要成果:
- 同位素值在0.704226到0.709764.4之间.
- 观察到值具有显著的区域分布.
- 在高地样本中发现了最低的值,沿海值显示北向南的梯度.
结论:
- 厄瓜多尔的值显示区域聚类,独立于火山的影响.
- 预测模型,特别是那些基于秘鲁数据的模型,不能准确地反映厄瓜多尔同位素值.
- 在厄瓜多尔考古样本中对生物可用的进行全面,大规模的基线研究是必不可少的.
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