Abstract Abstract This paper presents a spectral identification method of the alterated clay minerals,according to their spectral characteristic absorption in the Near Infrared and Short-Wave Infrared(NIR-SWIR). The principle of this method is that the spectra in the NIR-SWIR have a certain characteristic absorptions and the number of absorptions, the position of wavelength and the strength of an absorption are different on the basis of the different alterated clay minerals. Therefore, measuring the spectral absorptions wave length and strength of the samples may identificate the alterated clay minerals.At first, the spectra of the sample are measured with the IRIS Spectroradiometer in this method. The characteristic absorptions wavelength and strength of the measured sample spectrum in the NIR-SWIR are then encoded. Finally, minerals identification will be done by using the code comparison with the spectral codes of the standard alterated clay minerals stored in the data base.This method includes the calculation the hull curve, computing the hull quotient,detecting absorption minima point and corresponding wavelength position, encoding to the absorption wavelength and strength, and minerals identification by code matching.
LI Chao-Kui,ZHOU Guo-Qing,GAO Li-Kun, et al. THE IDENTIFICATION METHOD OF ALTERATED CLAY MINERALS ACCORDING TO THE SPECTRA IN THE NEAR INFRARED AND SHORTWAVE INFRARED REGIONS[J]. REMOTE SENSING FOR LAND & RESOURCES,
1995, 7(3): 40-46.
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