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. 2017 Dec 7;122(12):2510–2543. doi: 10.1002/2017JE005267

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©2017. The Authors.

This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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Scatterplots illustrating relationships between elements as measured at the Namib dune by the ChemCam LIBS instrument. The centroid is the average ChemCam‐determined elemental composition, and lines radiate outward in the direction of end‐member crystalline phases or the amorphous phase as determined by CheMin [Achilles et al., 2017]. (a) FeO versus SiO₂, (b) MgO versus SiO₂, (c) Na₂O versus SiO₂, (d) element total difference from 100 wt % versus SiO₂, (e) MgO versus Al₂O₃, (f) Na₂O versus Al₂O₃, and (g) element total difference from 100 wt % versus FeO.