Fig. 2: Absolute SWIR spectra and mineral identification.
From: Aqueous alteration of the Vastitas Borealis Formation at the Tianwen-1 landing site
The SWIR spectra before and after continuum removal (CR) of selected VBF-ZR rocks (a) and soils (b) compared to the spectra of pyroxene, imogolite, allophane, and opal from RELAB database. Dotted lines indicate the absorption centers of these phases. The gray regions indicate absorption features of the Martian atmosphere.
