Advances on microLIBS and microXRF mineralogical and elemental quantitative imaging

Mineralogical and petrographic studies require analytical methods capable to underline the repartition of major trace elements within geological samples. The EPMA (Electron Probe Micro Analyzer) conventional method used for such investigation, but on restrictive zones, is verge be reached by μLIBS (micro Laser-Induced Breakdown Spectroscopy) μXRF X-Ray Fluorescence) techniques allowing elemental imaging thin rock sections or even larger samples in only several hours. These spectroscopic with extremely fast acquisition speed (~10 ms/pixel) are perfectly adapted perform multi-elemental down ppm-level. Here, a mica schist section that displays wide paragenesis minerals, quantitative mapping obtained using spot analyses as internal reference compositions. We exhibit precision an entire thin/thick section. According these oxide weight contents, rapid mineral classification obtained, good discrimination between minerals those similar compositions (alumino-silicates andalusite kyanite) complex matrix (Fe-oxides, quartz, micas, feldspars…). • 100 Hz both scanning, fine-grained schist. Elemental mappings resolution 15 μm elements. Quantitative minor Rapid mineralogical whole Very close-compositions.