IODP Expedition 371 Portable X-ray fluorescence (p-XRF)

Energy-Dispersive X-Ray Fluorescence (ED-XRF) is a rapid, non-destructive technique for determining qualitative and quantitative changes in chemical composition. Aboard the JOIDES Resolution, pXRF is used for measuring points on section halves, rock pieces, and sometimes powders. Spots are typically irradiated at multiple conditions to excite and measure a wide range of elements. The peak intensity changes (we do not provide concentrations) are then used to help recognize and define major chemo-stratigraphic units without the need for destructive sampling.能量色散X射线荧光光谱（Energy-Dispersive X-Ray Fluorescence，ED-XRF）是一种可快速、无损检测化学成分定性与定量变化的分析技术。搭载于乔迪斯·决心号（JOIDES Resolution）钻探船的便携式X射线荧光光谱（portable X-ray fluorescence，pXRF），被用于对岩心半块、岩块乃至部分粉末样品的测点开展测量。通常会针对测点采用多种辐照条件进行激发，以实现多元素的宽范围检测。后续可通过峰强度变化（本数据集不提供元素浓度数值）辅助识别并厘定主要化学地层单元，无需进行破坏性取样。