Biologically available Pb: A method for ancient human sourcing using Pb isotopes from prehistoric animal tooth enamel

Biologically available Pb: A method for ancient human sourcing using Pb isotopes from prehistoric animal tooth enamel
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生物可利用的铅:古代人类利用史前动物牙釉质中的铅同位素获取铅的方法

DOI:
10.1016/j.jas.2020.105079
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发表时间:
2020
影响因子:
2.8
通讯作者:
Potra, Adriana
Potra, Adriana
中科院分区:
地球科学2区
文献类型:
--
作者:
Samuelsen, John R.;Potra, Adriana

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本研究分析铅同位素结合生物(古人类和史前动物牙齿)和地质(土壤渗滤液,整个岩石,岩石渗滤液)样品,以确定史前骨骼元素的起源。它阐明了生物有效铅方法如何评估使用史前动物牙齿和铅同位素数据的多变量/线性性质的古人类种群的早期生命位置。铅同位素提供了一种有价值的技术,部分原因是它们的六种稳定同位素比率之间的相关性。其他研究也使用铅同位素进行类似的目的,但没有明确的方法来确定一个地方的范围尚未正式定义和测试。生物有效铅方法使用许多史前动物牙釉质样本来建立该地区局部比例的基线,然后将其比例的线性模式与人类遗骸进行比较,以测试它们是否是非局部的。该案例研究比较了史前动物牙齿、人类牙齿和阿肯色州西南部整个岩石中的铅同位素。将这些结果与路易斯安那州和密西西比的动物样本以及伊利诺伊州和新墨西哥州的人类数据进行比较。土壤渗滤液,牙釉质中的铅浓度和微量元素分析被用来评估污染。与西南部阿肯色州的全岩铅同位素比值的比较表明,它们的变化太大,不能用于与古人类遗骸进行直接比较,这说明史前动物牙齿更适合与史前人类牙齿进行直接比较。生物有效铅方法提供了一个关键的分析工具,需要研究古代人类的来源。
This study analyzes Pb isotopes combining biological (ancient human and prehistoric animal teeth) and geological (soil leachate, whole rock, and rock leachate) samples to determine the origins of prehistoric skeletal elements. It exemplifies how the biologically available Pb method assesses the early lifetime locations of ancient human populations using prehistoric animal teeth and the multivariate/linear nature of Pb isotope data. Lead isotopes provide a valuable technique, in part due to the correlation between their six stable isotope ratios. Other studies have used Pb isotopes for similar purposes, but no clear method for determining a local range has yet been formally defined and tested. The biologically available Pb method uses many prehistoric animal tooth enamel samples to establish a baseline for local ratios in the region, then compares their ratios’ linear patterning to human remains to test if they are non-local. The case study compares Pb isotopes from prehistoric animal teeth, human teeth, and whole rocks from southwest Arkansas. These results are compared to animal samples from Louisiana and Mississippi and human data from Illinois and New Mexico. Soil leachates, Pb concentrations of tooth enamel, and trace element analysis are used to assess contamination. Comparisons to southwest Arkansas whole rock Pb isotope ratios suggest they are too variable to be used for direct comparison to ancient human remains, illustrating that prehistoric animal teeth are more appropriate for direct comparison to prehistoric human teeth. The biologically available Pb method provides a key analysis tool needed for studies of ancient human sourcing.
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