The influence of different tempers on the composition of pottery
The influence of different tempers on the composition of pottery
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DOI：
10.1016/j.jas.2009.03.022
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发表时间：
2009-07-01
影响因子：
2.8
通讯作者：
Bichler, Max
中科院分区：
文献类型：
--
作者：
Sterba, Johannes H.;Mommsen, Hans;Bichler, Max
陶工对原粘土进行改性以生产适合预期用途的糊状物，这给通过化学指纹鉴定原始粘土来源的问题增加了一层困惑。通过从相同的市售原料粘土制备不同的膏体，并通过仪器中子活化分析对其进行化学分析，（回火，混合比，烧成温度和取样方法）揭示了不同脾气的影响。结果表明，两种不同的取样程序（钻孔和研磨）对化学指纹几乎没有影响，除了As，Zr，这可能是由于化合物（As）的挥发性或锆石晶体（含有Zr和Hf）的存在，其在钻探期间部分损失。三种不同的烧成温度也没有显示出显著的影响。Beier和Mommsen在1995年引入的修正的马氏距离作为统计滤波器的应用以及对原始数据引入的“稀释因子”表明，石英主导的回火的影响可以从数据中过滤掉，从而解析原始粘土源的潜在化学指纹。同时，通过数学方法消除稀释引入的额外扩散，即使相似糊剂之间的细微差异也可以通过标准的多元统计方法解决。(C)2009爱思唯尔有限公司保留所有权利。
The modification of the raw clay by the potter to produce a paste suitable for the intended purposes adds a layer of obfuscation to the problem of provenancing the original clay source by chemical fingerprinting. By preparing different pastes from the same commercially available raw clay and their chemical analysis by Instrumental Neutron Activation Analysis, an experiment under controlled conditions (tempers, mixing ratios, firing temperatures and sampling methods) sheds light on the influence of different tempers.The results show that two different sampling procedures (drilling and grinding) have almost no influence on the chemical fingerprint with the exception of the elemental concentrations of As, Zr, and HE This may be due to the volatility of the compounds (As) or the presence of zircon crystals (containing Zr and Hf) which are partly lost during drilling. Three different firing temperatures show no significant influence as well.The application of the modified Mahalanobis distance introduced by Beier and Mommsen in 1995 as a statistical filter and the introduction of a 'dilution factor' to the raw data show that the influence of quartz-dominated tempers can be filtered out of the data, resolving the underlying chemical fingerprint of the original clay source. At the same time, by mathematically removing the additional spread introduced by dilution, even subtle differences between similar pastes can be resolved by standard multivariate statistical means. (C) 2009 Elsevier Ltd. All rights reserved.