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国内外研究成果表明,便携式X荧光光谱仪(PXRF)在文物矿料产源研究中具有一定的可行性。基于此,利用PXRF检测陕西洛南河口、湖北竹山、河南淅川等东秦岭5个不同产地绿松石样品,结果显示,不同矿点绿松石样品在某些元素含量方面存在差异。随之建立主成分分析(PCA)鉴别模型。建模结果表明,三个主成分因子累计方差贡献率达86%,样本在主成分空间中大体聚集为不同的区域,结合Ba、V、U元素的散点图,基本实现不同产地绿松石的鉴别。提取模型的载荷因子,分析显示,5个产地绿松石的差异主要在Sn、Sb、Te、Sr、Ni、Ba、V、Mo、U九种元素上。运用该方法初步判定洛南河口绿松石古矿可能是二里头遗址出土绿松石的矿源之一。研究结果表明PXRF结合PCA分析,可以一定程度实现不同产地绿松石的鉴别。
The research results at home and abroad show that the portable X-ray fluorescence spectrometer (PXRF) has some feasibility in the study of cultural relics source. Based on this, turquoise samples from five different producing areas in the East Qinling Mountains of Luonan estuary in Shaanxi Province, Zhushan in Hubei Province and Xichuan in Henan Province were detected by PXRF. The results showed that there were some differences in some elemental contents of turquoise samples from different ore points. Followed by the establishment of principal component analysis (PCA) identification model. The modeling results show that the cumulative variance of the three principal component factors contributes to 86%. The samples generally converge into different regions in the principal component space. Combining the scatterplot of Ba, V and U elements, the samples of turquoise Identification. The load factor of the model was extracted and the analysis showed that the differences of turquoise in the five producing areas were mainly on the nine elements of Sn, Sb, Te, Sr, Ni, Ba, V, Mo and U. The preliminary determination of the turquoise ore of the Luonan estuary by this method may be one of the sources of turquoise unearthed at Erlitou site. The results show that PXRF combined with PCA analysis can be achieved to some extent turquoise identification of different origin.