Laser-induced breakdown spectroscopy-based geochemical fingerprinting for the rapid analysis and discrimination of minerals: The example of garnet

摘要: Laser-induced breakdown spectroscopy (LIBS) is an analytical technique real-time geochemical analysis that being developed for portable use outside of the laboratory. In this study, statistical signal processing and classification techniques were applied to single-shot, broadband LIBS spectra, comprising measured plasma light intensities between 200 960 nm, a suite 157 garnets different composition from 92 locations worldwide. Partial least squares discriminant was sets 25 spectra each garnet sample used classify samples based on geographic origin. Careful consideration given cross-validation procedure ensure algorithm robust unseen data. The results indicate can be discriminate has potential discern