Multi-Scale X-ray Fluorescence Geochemical Data for Igneous Rocks and Their Alteration Products

This dataset contains quantitative micro-X-ray Fluorescence (µXRF) geochemical data for igneous rocks and their alteration products acquired at four spatial resolutions (5, 25, 50 and 100 µm beam diameters). Analyses were performed on four geological thin sections by laboratory µXRF using an IXRF ATLAS X (IXRF Systems) housed at the Centre for Microscopy and Microanalysis, The University of Queensland. The dataset includes both raw geochemical data (unnormalized elemental concentrations, reported in ppm, exported directly from GeoPIXE v8.7) and processed geochemical data (normalized oxide concentrations reported in wt%). These data underpin the results presented in Dimarco Z. et al., "Scale Dependent X-ray Fluorescence Analysis of Igneous Rocks and Their Alteration Products" a manuscript submitted to Journal of Geophysical Research: Planets. The dataset enables quantitative assessment of how analytical resolution influences geochemical variance, mineral identification, and downstream petrological and geological interpretations.本数据集包含火成岩及其蚀变产物的定量微区X射线荧光（micro-X-ray Fluorescence, µXRF）地球化学数据，采集时采用四种空间分辨率（光束直径分别为5、25、50和100 µm。分析工作由昆士兰大学显微与微分析中心（Centre for Microscopy and Microanalysis, The University of Queensland）配置的IXRF ATLAS X型实验室微区X射线荧光光谱仪（IXRF Systems）完成，共对4件地质薄片开展了测试。本数据集涵盖两类数据：其一为原始地球化学数据，即未经归一化的元素浓度，单位为ppm，直接从GeoPIXE v8.7导出；其二为经过处理的地球化学数据，即以重量百分比（wt%）表示的归一化氧化物浓度。本数据集支撑了Dimarco Z.等人提交至《地球物理研究杂志：行星》（Journal of Geophysical Research: Planets）的论文《火成岩及其蚀变产物的尺度依赖性X射线荧光分析》（Scale Dependent X-ray Fluorescence Analysis of Igneous Rocks and Their Alteration Products）的研究成果。本数据集可用于定量评估分析分辨率对地球化学方差、矿物识别以及后续岩石学与地质学解释的影响。