Fig. 2: Combining MIST stoichiometic olivine and spatially coherent monocrystalline mapping to remove beam mixing effects and increase the Fo-content accuracy.
From: Igneous and sedimentary origins of Jezero crater units from X-ray crystal mapping on Mars
a PIXL beam locations for a PIXL scan on the Solva abrasion patch (Figs. 1, 4c and S5) with compositions of stoichiometric olivine, as identified with the MIST algorithm33,59. Arrows point to a large olivine grain discernable in context imagery. b The number of diffraction peaks detected at each beam location. c Spatially coherent monocrystalline regions (black) and their spatially constrained interior regions (blue). d Compositions of monocrystalline stoichiometric olivine in the spatially constrained monocrystalline regions, as calculated with the MIST algorithm. e PIXL scan outline overlaid on a colourized ACI image82 of the abrasion patch. Colourization image processing credit: NASA/JPL-Caltech/MSSS/S. Sharma. f PIXL MCC Green (530 nm)/IR (735 nm) image83.
