Lunar pyroxene and olivine abundance analysis of Sinus Iridum

Abstract

Composition distribution on the lunar surface is an important scientific topic. In order to establish pyroxene and olivine quantitative inversion models of Sinus Iridum, we analyze the spectral characteristics of major mineral. First,according to pyroxene and olivine in the 300–2600 nm spectral range of absorption feature, we use Modified Gaussian Model(MGM) model to calculate spectral absorption characteristics at 19 sampling points of the Lunar Soil Characterization Consortium(LSCC), which is also performed detailed chemistry and modal abundance analyses on each of these samples. We obtain five spectral absorption characteristics, and each has three characteristic parameters:absorption center(Center), absorption width(FWHM), and absorption intensity(Strength). Then, the mineral inversion model is established by using linear regression analysis based on LSCC data, and is validated by simulated spectra, which are made by the bidirectional reflectance function of Hapke on M3hyper-spectra data. At last, the quantitative inversion models of pyroxene and olivine have been applied to the Sinus Iridum area, which is the preferred landing station of Chang'E-3 lunar rover. The mineral abundance distribution maps of this area are made.Experiments show that using MGM model fitting analysis method for hyper-spectra remote sensing of minerals identification is a kind of feasible research approach.