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Geochemical characterization of ochre from central coastal British Columbia, Canada

机译:加拿大不列颠哥伦比亚省中部沿海coastal石的地球化学特征

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The use of ochre and its presence in archaeological contexts is well documented archaeologically, ethnographically and historically. Elemental analysis of ochre is becoming increasingly common as a method for identifying ancient quarrying and mining practices, and for identifying patterns of resource use, trade and exchange. As this type of work has become more common it has become apparent that two critical issues need to be considered: (1) the need for systematic identification of trends and patterns in ochre geochemistry using appropriate statistical analyses, and, (2) consideration of geographic and geologic scale in relation to ochre chemistry. Because ochre is a heterogeneous material relative to other raw material types, it is necessary to apply multivariate and discriminant statistics to differentiate geochemical groups within a sample set. However, caution must be taken when interpreting statistical results at face value. Local geologic and geomorphologic conditions play a significant role in ochre chemistry and need to be taken into account when interpreting analytical results. The purpose of this project was to determine if geochemically distinct groups of ochre could be distinguished through neutron activation analysis (NAA) of archaeological and geological ochres from the central coast of British Columbia, Canada. The results show that it is possible to satisfy the provenance postulate and to differentiate chemical groups through elemental characterization and using multivariate statistical methods.
机译:cher石的使用及其在考古学背景下的存在在考古学,人种学和历史上得到了很好的记录。 identifying石的元素分析作为一种识别古代采石和采矿方法以及识别资源使用,贸易和交换方式的方法,正变得越来越普遍。随着这类工作的日益普遍,显然需要考虑两个关键问题:(1)需要使用适当的统计分析系统地识别o石地球化学的趋势和模式,以及(2)考虑地理因素。与o石化学有关的地质规模。由于o石相对于其他原材料类型是异质材料,因此有必要应用多元和判别统计量来区分样品集中的地球化学基团。但是,在按面值解释统计结果时必须小心。当地的地质和地貌条件在o石化学中起着重要的作用,在解释分析结果时必须考虑到这一点。该项目的目的是确定是否可以通过来自加拿大不列颠哥伦比亚省中部海岸的考古和地质石的中子活化分析(NAA)来区分geo石的地球化学特征。结果表明,有可能满足起源假设并通过元素表征和使用多元统计方法区分化学基团。

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