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首页> 外文期刊>Journal of Archaeological Science >Potential use of Fe isotopes for ancient non-ferrous metals tracing through the example of a lead-silver production site (Imiter mine, Anti-Atlas, Morocco)
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Potential use of Fe isotopes for ancient non-ferrous metals tracing through the example of a lead-silver production site (Imiter mine, Anti-Atlas, Morocco)

机译：潜在使用Fe同位素用于古代有色金属追踪铅银生产点（Imiter Mine，Anti-Atlas，Morocco）的示例

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Determining the provenance of non-ferrous metals is a major issue in archaeology and history. The classical method using Pb isotopes shows several limitations, and new isotopic tracers need to be developed in archaeometallurgy. Recently, Fe isotopes were found to be promising for iron metal tracing. In this context, we evaluated the pertinence of Fe isotopes as a new tool for provenance studies of non-ferrous metals. We collected slag and furnace lining samples from the Imiter silver mine in Morocco (Anti-Atlas), where many archaeological remains attest ancient lead-silver production. Their mineralogical composition was investigated by optical microscopic observations, SEM-EDS and EPMA. Besides, we measured both Pb and Fe isotope compositions of these samples by high resolution MC-ICP-MS after wet sample decomposition and purification chemistry. The occurrence of Ag, Pb, Cu and Ag/Pb metallic beads in the slag samples and their high Fe content suggests that these metallurgical materials result from the exploitation of Ag-rich polymetallic ores associated with gossan formations. Isotopic analyses of these slags highlighted their heterogeneous Pb isotope compositions and homogeneous Fe isotope composition. This points to the exploitation of two distinct ore sources with different Pb but similar Fe isotope compositions, despite the Fe isotope variability often encountered in metallic ores worldwide. Hence, Fe isotopes provide a complementary approach to trace lead-silver products from Imiter. Overall, the combination of Pb and Fe isotope analyses constitutes a promising method for further provenance investigations of nonferrous metals.
机译：确定非黑色金属的出处是考古和历史中的主要问题。使用PB同位素的经典方法显示了几个限制，并且需要在archaeomethurgy中开发新的同位素示踪剂。最近，发现Fe同位素是对铁金属追踪的承诺。在这种情况下，我们评估了Fe同位素作为非黑色金属的出源研究的新工具。我们从摩洛哥（反阿特拉斯）的Imiter Silver Mine收集了炉渣和炉子衬里样本，许多考古仍然证明古代铅银产量。通过光学显微镜观察，SEM-EDS和EPMA研究了它们的矿物学组合物。此外，我们在湿样品分解和纯化化学之后通过高分辨率MC-ICP-MS测量了这些样品的Pb和Fe同位素组合物。炉渣样品中的Ag，Pb，Cu和Ag / Pb金属珠粒及其高Fe含量的发生表明，这些冶金材料是由与甘露甘露组织相关的Ag富有的多金属矿石的开采。这些渣的同位素分析突出了它们的非均相PB同位素组合物和均匀的Fe同位素组合物。尽管在全球金属矿石中经常遇到Fe同位素可变性，但这指出了具有不同PB但类似的Fe同位素组合物的两种不同的矿石组合物。因此，Fe同位素提供了一种互补方法来弥合来自造皮肌的铅银产物。总的来说，Pb和Fe同位素分析的组合构成了有望的方法，用于进一步的有色金属的出处调查。

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