Search results for "mineral mapping"

showing 3 items of 3 documents

Time-gated Raman and laser-induced breakdown spectroscopy in mapping of eudialyte and catapleiite

2020

Raman analysis of rock samples containing rare earth elements (REEs) is challenging due to the strong fluorescence, which may mask the weaker Raman signal. In this research, time‐gated (TG) Raman has been applied to the construction of the mineral distribution map from REE‐bearing rock. With TG Raman, material is excited with a short subnanosecond laser pulse, and the Raman signal is collected within a picosecond‐scale time window prior to the formation of a strong fluorescent signal by means of single‐photon avalanche diode array. This allows signal readout with a significantly reduced fluorescence background. TG Raman maps are used to reveal the location of valuable minerals and are compa…

rock analysisspektroskopiatime-gated RamanREE&-bearing mineralslaser-induced breakdown spectroscopy (LIBS)mineral mapping
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Singular value decomposition approach to the yttrium occurrence in mineral maps of rare earth element ores using laser-induced breakdown spectroscopy

2017

Laser-induced breakdown spectroscopy (LIBS) has been used in analysis of rare earth element (REE) ores from the geological formation of Norra Kärr Alkaline Complex in southern Sweden. Yttrium has been detected in eudialyte (Na15 Ca6(Fe,Mn)3 Zr3Si(Si25O73)(O,OH,H2O)3 (OH,Cl)2) and catapleiite (Ca/Na2ZrSi3O9·2H2O). Singular value decomposition (SVD) has been employed in classification of the minerals in the rock samples and maps representing the mineralogy in the sampled area have been constructed. Based on the SVD classification the percentage of the yttrium-bearing ore minerals can be calculated even in fine-grained rock samples. peerReviewed

Materials sciencespektroskopiaEudialyteMineralogychemistry.chemical_elementengineering.material010502 geochemistry & geophysics01 natural sciencesAnalytical ChemistryGeological formationSingular value decompositionmineraalitLaser-induced breakdown spectroscopySpectroscopyInstrumentationta116Spectroscopy0105 earth and related environmental sciencesgeographygeography.geographical_feature_categoryMineralRare-earth element010401 analytical chemistrysingular value decompositionYttriumharvinaiset maametallitAtomic and Molecular Physics and Optics0104 chemical sciencesyttriumrock analysischemistryanalyysiengineeringlaser-induced breakdown spectroscopy (LIBS)mineral mappingSpectrochimica Acta Part B: Atomic Spectroscopy
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Time‐gated Raman and laser‐induced breakdown spectroscopy in mapping of eudialyte and catapleiite

2019

Abstract Raman analysis of rock samples containing rare earth elements (REEs) is challenging due to the strong fluorescence, which may mask the weaker Raman signal. In this research, time‐gated (TG) Raman has been applied to the construction of the mineral distribution map from REE‐bearing rock. With TG Raman, material is excited with a short subnanosecond laser pulse, and the Raman signal is collected within a picosecond‐scale time window prior to the formation of a strong fluorescent signal by means of single‐photon avalanche diode array. This allows signal readout with a significantly reduced fluorescence background. TG Raman maps are used to reveal the location of valuable minerals and …

Materials science010401 analytical chemistryAnalytical chemistryEudialyteMineral mappingtime‐gated Raman02 engineering and technologyengineering.material021001 nanoscience & nanotechnology01 natural sciences0104 chemical sciencesrock analysissymbols.namesakelaser‐induced breakdown spectroscopy (LIBS)symbolsengineeringGeneral Materials ScienceLaser-induced breakdown spectroscopymineral mapping0210 nano-technologyRaman spectroscopySpectroscopyREE‐bearing mineralsJournal of Raman Spectroscopy
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