VNIR spectroscopy of rock forming minerals mixtures: a tool to interpret planetary igneous compositions

illustrating the spectral variations due to the different intensity of the plagioclase absorption varying it Fe²⁺ content once mixed with orthopyroxene - clinopyroxene, orthopyroxene - olivine poor and - olivine rich materials (Serventi et al., 2013);

an IMSA (Hapke, 1993) application to retrieve the endmember.s optical constants and to model the relative mineral abundances in intimate mixtures (Ciarniello et al., 2011) highlighting the influence of the mineral distributions (Carli et al., 2014); a spectra deconvolution with Modified Gaussians (MGM, Sunshine et al., 1990) to define spectral parameters (Band Center, Depth and Width) trends respect to the mineralogical composition of endmembers (mineral chemistry) and mixtures (mineral abundances). Also discussing the influence of the sizes (Serventi et al., 2015).