Method for calculating Al-OH absorption position of muscovite by using hyperspectral data

Abstract

The invention belongs to the technical field of hyperspectral remote sensing analysis, and particularly relates to a method for calculating the Al-OH absorption position of muscovite by using hyperspectral data. The method comprises: 1, extracting muscovite type minerals, and recording the result as result (Muscovite); 2, carrying out wave band calculation on aviation hyperspectral data, and recording the calculation result as result (Al-OH); 3, calculating the intersection set of the treatment result of the step 1 and the treatment result of the step 2, and recording as result (mus-wavelength); and 4, carrying out density division on the result obtained in the step 3. According to the present invention, based on the aviation hyperspectral data in the existing spectral resolution, the muscovite type mineral unit is extracted, the Al-OH absorption peak position of the muscovite type mineral is calculated through the wave band calculation, and further the muscovite type mineral is subdivided according to the absorption peak position so as to be well used for mineral exploration.

Description

technical field [0001] The invention belongs to the technical field of hyperspectral remote sensing analysis, in particular to a method for calculating muscovite Al-OH absorption position with hyperspectral data. Background technique [0002] Airborne hyperspectral data have been widely used in surface alteration mineral mapping. At present, people mainly obtain hyperspectral data through aerial hyperspectral imaging equipment (such as Hymap in Australia, CASI / SASI / TASI in Canada, etc.), and use a A series of technical means are used to extract the altered mineral information from these data. These technical means are mainly based on the comparison of the reflectance spectrum of the hyperspectral image with the spectral library or endmember spectrum. It can extract serpentine, tremolite, Dozens of altered minerals, such as limonite, muscovite, montmorillonite, kaolinite, chlorite, epidote, and calcite, have high identification accuracy and are therefore widely used. [0003...

AI Technical Summary

Problems solved by technology

[0004] The traditional hyperspectral alteration mineral extraction method can accurately extract muscovite minerals, but it is difficult to distinguish different muscovite minerals due to the limitation of the spectral resolution of aerial hyperspectral imaging equipment (such as the spectral resolution of SASI is 15nm). Small changes among minerals, such as muscovite minerals with different Al-OH absorption peak positions (2180nm-2230nm), thus greatly restricting the further application of airborne hyperspectral data

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