Search results for "rock analysis"
showing 4 items of 4 documents
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 …
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
Data for: Cambrian–Ordovician magmatism of the Ikh-Mongol Arc System exemplified by the Khantaishir Magmatic Complex (Lake Zone, south–central Mongol…
2017
Electronic Appendix 1 Materials and methods (unabridged version) Electronic Appendix 2 List of studied samples from the Khantaishir Magmatic Complex Electronic Appendix 3 Selected mineral analyses from the Khantaishir Magmatic Complex: (a) Amphibole (13 eCNK), (b) plagioclase, (c) biotite (Bt), orthopyroxene (Opx), clinopyroxene (Cpx) and olivine (Ol) Electronic Appendix 4 LA-ICP-MS analytical data for dated zircons from the Khantaishir Magmatic Complex Electronic Appendix 5 In situ Hf analytical data for dated zircons Electronic Appendix 6 Major-element analyses for rocks of the Khantaishir Magmatic Complex (wt. %) and CIPW normative compositions (Hutchison, 1975) Electronic Appendix 7 Tra…
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…