现场X射线荧光光谱分析在钻孔岩芯测量中的应用

The Application of in-situ X-Ray Fluorescence Technique in Drill Core Measurement

通过对多宝山矿区内20个浅钻孔的37件样品分别进行岩芯样品和粉末样品的现场EDXRF测量,得到如下结果:Cu、Zn、Mn三种元素的岩芯测量与粉样测量结果整体变化趋势一致,能准确识别高含量异常;部分岩芯由于矿化不均匀效应影响使得岩芯测量结果高于粉末测量结果,该误差可通过增加岩芯测量点和劈芯后测量等方法进行校正;对样品使用室内波长色散谱仪分析结果为依据进行对比,误差可控制在20%以内。

The in-situ core analysis is made by field EDXRF analysis during the process of anomaly inspection in Duobaoshan polymetallic area.There is a high level of consistency between core in-situ analysis and core powder sample analysis.The regional high-anomaly for some elements,such as copper,zinc and manganese,can be obtained by analyzing 37 samples from 20 drill holes.Some error,which is led by uneven mineralization,can be corrected via multi and Split-core measurement.The relative error is less than 20% between in-situ EDXRF and WDXRF in laboratory.