On the behavior of siderophilic trace elements during iron production

铁生产过程中亲铁微量元素的行为

• 批准号: 460542971
• 负责人: Dr. Michael Brauns
• 金额: --
• 依托单位: Curt-Engelhorn-Zentrum Archäometrie gGmbh
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2021
• 资助国家: 德国
• 起止时间: 2020-12-31 至 2022-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/460542971?language=en
• 关键词: behavior; siderophilic; trace; elements; during

The primary goal is to extend the already established method of determining the provenance of iron using osmium isotopes by the chemical characterization of the ferrous metal. Within the scope of this project, a combination of methods with other siderophilic elements will be developed, which will achieve an even more robust determination of the origin of archaeological iron artifacts using (very) small samples. It is important to verify the theoretically expected behaviour (stability, volatility, contamination) of other siderophilic elements during the production chain of iron smelting in experiments and to demonstrate the applicability in an archaeological case study. Platinum group elements (PGEs) other than osmium should not be included. The extraction of PGEs from iron ores is complex, the contents are very low and the suitable basis for comparison is practically non-existent.Our research project will be carried out on an experimental study and an archaeological case study:1. analysis of the whole production chain from ore to the lump in three smelting experiments with different ores (set of samples of the Os-isotope data published in PlosOne, 30 samples)2. analysis of 4 archaeological iron objects of the Arabah region/IsraelOur approach shall be characterized by the fact that we use innovative and proven analytical methods (laser ablation on impregnated powder samples or direct ablation of metallic iron see e.g. (Shaheen et al. 2017)), which will provide us in the future with highly precise analytical data (all of the above mentioned trace and main elements) without great effort. This approach could also be used by other scientists in the same or similar way in the future. This would provide the basis for a larger and more complete data basis within the scope of this project, which would achieve a more secure classification of archaeological iron objects.The combination of the two methods - trace element analysis and Os-isotope analysis - offers several advantages: larger sample series of iron objects can be grouped together on this meadow with only little intervention in the objects themselves according to their chemical composition. Further more destructive analyses, slag inclusions or Os-isotope analyses, could then be performed on a smaller selection of material groups. In addition, characteristic trace elements supplement the osmium isotope with information on the possible deposit type, which makes it possible to further narrow down the assignment of isotope ratios to a specific deposit. This complementary method would be of particular importance for iron finds for which information on possible smelting sites and thus also smelting waste such as slags is missing.

主要目标是扩展已经建立的通过黑色金属的化学表征使用锇同位素确定铁来源的方法。在该项目的范围内，将开发与其他亲铁元素相结合的方法，这将使用（非常）小的样本更可靠地确定考古铁器的起源。在实验中验证铁冶炼生产链中其他亲铁元素的理论上预期的行为（稳定性、挥发性、污染）并证明其在考古案例研究中的适用性非常重要。不应包含除锇以外的铂族元素 (PGE)。从铁矿石中提取PGEs的过程比较复杂，含量很低，几乎不存在合适的比较基础。我们的研究项目将通过实验研究和考古案例研究来进行： 1．在三个不同矿石的冶炼实验中分析从矿石到块状物的整个生产链（PlosOne 中发布的锇同位素数据样本集，30 个样本）2。对以色列/阿拉巴地区的 4 个考古铁器的分析我们的方法的特点是我们使用创新且经过验证的分析方法（对浸渍粉末样品进行激光烧蚀或直接烧蚀金属铁，参见例如（Shaheen 等人，2017 年）），这将为我们将来提供高度精确的分析数据（所有上述痕量元素和主要元素），而无需付出很大的努力。这种方法将来也可以被其他科学家以相同或类似的方式使用。这将为该项目范围内更大、更完整的数据基础提供基础，从而实现对考古铁器的更安全的分类。微量元素分析和锇同位素分析这两种方法的结合具有多种优点：可以在这片草地上将更大的铁器样本系列分组在一起，而根据其化学成分，只需对物体本身进行很少的干预。然后可以对较小的材料组进行进一步更具破坏性的分析、夹渣或锇同位素分析。此外，特征微量元素还为锇同位素补充了可能矿床类型的信息，从而可以进一步缩小特定矿床同位素比率的范围。 这种补充方法对于铁矿发现尤其重要，因为铁矿发现可能缺少冶炼地点的信息，因此也缺少炉渣等冶炼废物的信息。