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Strontium isotopes as an indicator of human migration – easy questions, difficult answers

机译:锶同位素可作为人类迁移的指标-简单问题,困难答案

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Isotope analyses of bones and teeth allow us to study phenomena which occurred in the history of human species and which are difficult to capture by traditional anthropological methods. Measuring oxygen, nitrogen and carbon isotope levels in the skeleton makes it possible to reconstruct climatic changes, diet and/or the weaning process. Among isotopes used in such analyses are strontium isotopes, helpful in analysing migration and studying the mobility of historical and prehistoric human populations. In this respect, the proportion of two isotopes, the heavier 87Sr and the lighter 86Sr, is measured, following their extraction from the bioapatite of the bone mineral. Released from rocks in the weathering process, strontium permeates individual components of inanimate and animate environments, and then finds its way, together with food, to the human body. Thanks to comprehensive environmental studies and the measurement of the strontium ratio 87Sr/86Sr in various animal tissues it is possible to determine the local isotope background for the environment. Values obtained by analysing human skeletons referenced against the range of environmental isotope variability enable researchers to trace back the location inhabited by the individual or group.
机译:骨骼和牙齿的同位素分析使我们能够研究人类历史上发生的,用传统人类学方法难以捕获的现象。通过测量骨骼中的氧,氮和碳同位素含量,可以重建气候变化,饮食和/或断奶过程。在这种分析中使用的同位素中,锶同位素有助于分析迁移和研究历史和史前人类的迁移。在这方面,在从骨矿物质的生物磷灰石中提取了两种同位素后,就测量了两种同位素(较重的87Sr和较轻的86Sr)的比例。锶在风化过程中从岩石中释放出来,渗透到无生命和有生命的环境的各个组成部分中,然后与食物一起进入人体。由于全面的环境研究和各种动物组织中锶比87Sr / 86Sr的测量,有可能确定环境的局部同位素背景。通过根据环境同位素变异性范围分析人体骨骼而获得的值使研究人员能够追溯到个人或群体所居住的位置。

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