Laboratory of X-ray Analytical Applications-LARX, Institute of Earth Sciences, Jaume Almera, Spanish Council for Scientific Research-CSIC, Sole Sabaris Street s/n, 08028 Barcelona, Spain.
Appl Spectrosc. 2010 Sep;64(9):1045-53. doi: 10.1366/000370210792434323.
Elemental analysis of different sediment cores originating from the Cartagena-La Union mining district in Spain was carried out by means of a programmable small-spot energy-dispersive X-ray fluorescence (EDXRF) spectrometer to study the distribution of heavy metals along soil profiles. Cores were obtained from upstream sediments of a mining creek, from the lowland sedimentation plain, and from a mining landfill dump (tailings pile). A programmable two-dimensional (2D) stage and a focal spot resolution of 600 μm allow us to obtain complete core mapping. Geochemical results were verified using a more powerful wavelength-dispersion X-ray fluorescence (WDXRF) technique. The data obtained was processed in order to study the statistical correlations within the elemental compositions. The results obtained allow us to observe the differential in-depth distribution of heavy metals among the sampled zones. Dump site cores exhibit a homogeneous distribution of heavy metals, whereas the alluvial plain core shows accumulation of heavy metals in the upper part. This approach can be useful for the fast screening of heavy metals in depositional environments around mining sites.
对源自西班牙卡塔赫纳-拉尤尼翁矿区的不同沉积物岩芯进行了元素分析，采用可编程微区能量色散 X 射线荧光（EDXRF）光谱仪研究重金属在土壤剖面上的分布。岩芯取自采矿溪的上游沉积物、低地沉降平原和采矿垃圾填埋场（尾矿堆）。可编程二维（2D）载物台和 600μm 的焦斑分辨率使我们能够获得完整的岩芯测绘。使用更强大的波长色散 X 射线荧光（WDXRF）技术验证了地球化学结果。对所获得的数据进行了处理，以研究元素组成内的统计相关性。获得的结果使我们能够观察到采样区之间重金属的不同深度分布。垃圾填埋场岩芯显示出重金属的均匀分布，而冲积平原岩芯则显示出重金属在上部的积累。这种方法可用于快速筛选采矿场地周围沉积环境中的重金属。
