Hyperspectral remote sensing is an advanced and up-coming technology in the field of remote sensing. The Geological Survey of India (GSI) has taken a lead in building up a comprehensive spectral library for rocks and minerals for the entire Indian sub-continent in line with the spectral library of the United States Geological Survey (USGS) and the Jet Propulsion Laboratory (JPL). The readymade spectra of minerals (including ore minerals) and rocks (altered and unaltered) could help in the identification of the mineralogical composition of an unknown area and ultimately in targeting the mineralised zones. The study is aimed at the spectral signature of kaolinite in both the solar illumination in the field and in artificial illumination (tungsten quartz halogen lamp) as source in the laboratory condition. The diagnostic absorption features of kaolinite in visible and NIR wavelrngh (0.35-2.50 ?m) are unavailable in the conventional remotely sensed data specially at 1.40 ?m and 1.90 ?m because of atmospheric obscuration. Kaolinite shows intense absorption at 1.396, 1.413, 1.913, 2.166 and 2.209 ?m and comparatively less absorption features at 0.37, 0.97, 2.327, 2.356, 2.385 ?m. The slightly broad absorption feature at 1.396 ?m with a sharper band at 1.413 ?m is because of the OH stretch overtones and features at 2.166 and 2.209 ?m are because of Al- OH bend plus OH stretch combination. Doublet at 1.40 and 2.20?m is characteristic of kaolinite.
Study on Spectral Signature of Kaolinite {Al2Si2O5(OH)4} from Bageshpura Clay Mines, Hassan District of Karnataka
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Hyperspectral remote sensing is an advanced and up-coming technology in the field of remote sensing. The Geological Survey of India (GSI) has taken a lead in building up a comprehensive spectral library for rocks and minerals for the entire Indian sub-continent in line with the spectral library of the United States Geological Survey (USGS) and the Jet Propulsion Laboratory (JPL). The readymade spectra of minerals (including ore minerals) and rocks (altered and unaltered) could help in the identification of the mineralogical composition of an unknown area and ultimately in targeting the mineralised zones. The study is aimed at the spectral signature of kaolinite in both the solar illumination in the field and in artificial illumination (tungsten quartz halogen lamp) as source in the laboratory condition. The diagnostic absorption features of kaolinite in visible and NIR wavelrngh (0.35-2.50 ?m) are unavailable in the conventional remotely sensed data specially at 1.40 ?m and 1.90 ?m because of atmospheric obscuration. Kaolinite shows intense absorption at 1.396, 1.413, 1.913, 2.166 and 2.209 ?m and comparatively less absorption features at 0.37, 0.97, 2.327, 2.356, 2.385 ?m. The slightly broad absorption feature at 1.396 ?m with a sharper band at 1.413 ?m is because of the OH stretch overtones and features at 2.166 and 2.209 ?m are because of Al- OH bend plus OH stretch combination. Doublet at 1.40 and 2.20?m is characteristic of kaolinite.
Publication Mode |
Online |
---|---|
Publication Author |
Jamal Anwar, Sana Sabir, Sumit Kumar Ahirwar, Nisha Rani, K. V. Krishnamurthy |
Publication Language |
English |
Publication Type |
Conference Paper |
Publication Year |
2016 |
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