岩石主微量元素的便携式X射线荧光光谱仪分析校准及应用

赵森; 王鑫玉; 孙明道

doi:10.3799/dqkx.2025.246

岩石主微量元素的便携式X射线荧光光谱仪分析校准及应用

doi: 10.3799/dqkx.2025.246

赵森^{1, 2,},
王鑫玉^1, ,,
孙明道^1, ,

1.
中国科学院广州地球化学研究所深地过程与战略矿产资源全国重点实验室, 广东广州 510640
2.
中国科学院大学地球科学与行星学院, 北京 100049

基金项目:

国家自然科学基金委基础科学中心项目《克拉通破坏与陆地生物演化》 42288201

详细信息

作者简介:
赵森（2001-），男，硕士研究生，主要从事地幔地球化学研究. E-mail：zhaosen@gig.ac.cn

通讯作者:
王鑫玉，E-mail：wangxy@gig.ac.cn

孙明道，E-mail：mdsun@gig.ac.cn

中图分类号: P591
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- 被引次数: 0
出版历程
- 收稿日期: 2025-01-22
- 刊出日期: 2026-02-25

Calibration and Application of Portable X-Ray Fluorescence Spectrometer for Major and Trace Element Analysis of Rocks

Zhao Shen^{1, 2
,},
Wang Xingyu^{1
, ,},
Sun Mingdao^{1
, ,}

1.
State Key Laboratory of Deep Earth Processes and Strategic Mineral Resources, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
2.
College of Earth Sciences and Planetary Sciences, University of Chinese Academy of Sciences, Beijing 100049, China

摘要

摘要: 便携式X射线荧光光谱仪（pXRF）能够快速无损地原位分析常见岩石的主微量元素组成. 为提高pXRF在地质样品分析中的准确性，选取了39件地质参考物质，包括火成岩、碳酸盐岩、碎屑沉积岩和沉积物等，使用Olympus Vanta pXRF对其粉末压片进行测定分析，并依据实测元素含量的多次测定平均值与参考物质推荐值之间的相关关系建立校准曲线. 确定了TiO₂、Sr、Zr、Y、Nb、Cu本身良好的精密度和准确度；发现了SiO₂和CaO含量在碳酸盐岩与火成岩、碎屑沉积岩-水系沉积物-土壤之间受基体效应影响明显，需对其分别建立不同的校准方程进行校准；此外，通过回归分析，显著提高了Al₂O₃、Fe₂O₃^T、MnO、K₂O、Rb、Zr、Pb、Zn、Cr、Ni、Nb元素的测量准确性. 而后选取燕山科学钻探的凌源钻孔（YSDP-4）前150 m岩心为研究对象，将其pXRF校正前后的数据与熔片法进行对比，结果证实校准后的数据与全岩粉末数据更加贴合. 结果证实通过该方法可以有效提高数据准确度，并扩展了pXRF仪器在岩心快速扫描分析中的广泛应用潜力.
- 手持XRF /
- 主微量分析 /
- 地质参考物质 /
- 燕山科学钻探 /
- 地球化学
Abstract: Portable X-ray fluorescence spectrometer (pXRF) enables rapid and non-destructive in-situ analysis of major and trace element compositions in common rocks. To improve the accuracy of pXRF in geological sample analysis, 39 geological reference materials were selected, including igneous rocks, carbonate rocks, clastic sedimentary rocks, and sediments. Olympus Vanta pXRF was used to analyze their powder pellets, and calibration curves were established based on the correlation between the average values of multiple measurements of the actual element contents and the recommended values of the reference materials. This study confirmed the good precision and accuracy of TiO₂, Sr, Zr, Y, Nb, and Cu themselves. It was found that the contents of SiO₂ and CaO were significantly affected by matrix effects between carbonate rocks and igneous rocks, as well as between clastic sedimentary rocks, stream sediments, and soils, requiring the establishment of different calibration equations for calibration. In addition, through regression analysis, this study significantly improved the measurement accuracy of elements such as Al₂O₃, Fe₂O₃T, MnO, K₂O, Rb, Zr, Pb, Zn, Cr, Ni, and Nb. Subsequently, the first 150 m core of the Lingyuan drill hole (YSDP-4) from the Yanshan Scientific Drilling Project was selected as the research object, and the pXRF data before and after calibration were compared with the fusion method. The results confirmed that the calibrated data were more consistent with the whole-rock powder data. The results demonstrate that this method can effectively improve data accuracy and expand the wide application potential of pXRF instruments in rapid core scanning analysis.
- handheld XRF /
- major and trace element analysis /
- geological reference materials /
- Yanshan Scientific Drilling /
- geochemistry
注释:

1) 附件见：https://doi.org/10.3799/dqkx.2025.246

HTML全文

图 1 标准样品推荐值与测试值散点图以及对应校准曲线

a~g. 主量元素SiO₂、TiO₂、Al₂O₃、Fe₂O₃^T、MnO、CaO、K₂O的实测值与推荐值散点图及拟合方程；h~r.微量元素Sr、Zr、Rb、Nb、Y、Cu、Pb、Zn、Cr、Ni、As的实测值与推荐值散点图及拟合方程.

Fig. 1. Scatter plots of recommended values vs. measured values for standard samples and corresponding calibration curves

下载: 全尺寸图片幻灯片

图 2 各元素的准确度分布图

绿点代表各个元素计算的外部误差平均值，并且将第5百分数与第95百分数作为准确度分布图的上下边界

Fig. 2. Accuracy distribution map of each element

下载: 全尺寸图片幻灯片

图 3 凌源钻孔上部部分岩性柱与描述以及pXRF测试结果与校正后的数据对比

红点代表全岩粉末测试出的结果；a图为表示了凌源钻孔0~150 m深度的岩性描述，包括砾状泥岩、夹白云岩薄层、纹层状泥岩、砂质泥岩、白云质砂岩多种岩性；b图为使用pXRF测试得到的未校准的SiO₂含量；c图为使用校准曲线校准后的SiO₂含量数据，校准后数据与标准测定之间较高的吻合程度

Fig. 3. Lithological column and description of the upper part of the Lingyuan drill hole, and comparison between pXRF test results and corrected data

下载: 全尺寸图片幻灯片

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