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The capability of Sentinel-2 image and FieldSpec3 for detecting lithium-containing minerals in central Iran

Frontiers of Earth Science 2022年第3期16卷 678-695页

作者： Kazem RANGZAN Mostafa KABOLIZADEH sajad zareie Adel SAKI Danya KARIMI Department of Remote Sensing and GIS Faculty of Earth SciencesShahid Chamran University of AhvazAhvaz ***Iran Department of Geology Faculty of Earth SciencesShahid Chamran University of AhvazAhvaz ***Iran

To date,there are very few studies about the spectroscopy of lithium-containing minerals(LCMs)in the scientific *** main objective of this study is to investigate the capability of Sentinel-2 image and FieldSpec3 spectro-radiometer in terms of mapping five important LCMs,including spodumene,lepidolite,amblygonite,petalite,and ***,first the FieldSpec3 spectro-radiometer was used to create the spectral curves of the ***,accurate spectral analysis and comparison of the studied LCMs were performed using The Spectral Geologist(TSG)and the Prism *** two software can show even slight difference in absorption features of different LCMs,which can discriminate and identify these ***-bearing rocks show absorption features at~365,~2200,and~2350 nm and reflective features at~550-770 *** features are consistent with Sentinel-2 ***,the created spectral curves were utilized for calibration of Sentinel-2 optical image to detect and map the potential zones of the rock units containing minerals mentioned above in a part of the central Iranian *** using the Spectral Angle Mapper(SAM)classifier module,the potential areas were *** of the five LCMs,petalite and spodumene showed more extensive coverage in the study *** speaking,the largest concentration of those LCMs can be seen in southern and centraleastern parts of the study *** comparison between spectral curves of reference and classified minerals confirmed the high capability of Sentinel-2 image for LCMs *** image classification results also confirmed the presence of the LCMs,but it cannot distinguish the LCMs type successfully.

关键词： FieldSpec3 spectro-radiometer lithium containing minerals Sentinel-2 ASTER Iran

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