IODP Expedition 395E 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射线荧光光谱法（Energy-Dispersive X-Ray Fluorescence，ED-XRF）是一种可快速、无损测定化学成分定性与定量变化的技术。在“乔迪斯·决心号”（JOIDES Resolution）钻探船上，便携式X射线荧光光谱法（pXRF）被用于对岩心切片半面、岩块及部分粉末样品开展点位测量。通常会在多种辐照条件下对测点进行辐照激发，以检测大范围的元素种类。后续可通过峰强度变化（本数据集不提供元素浓度数值），在无需破坏性采样的前提下，辅助识别并界定主要的化学地层单元。