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. 2021 Aug 6;7(32):eabh2687. doi: 10.1126/sciadv.abh2687

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Copyright © 2021 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Fig. 2 — (A) Positive correlation between SiO₂ and Al₂O₃ for all alpha particle x-ray spectrometer (APXS) analyzing results from Sol 1700 to Sol 2301. wt %, weight %. (B) Positive correlation between SiO₂ and TiO₂ for the same samples. (C) Poor correlation between the proportions of Si and Al in amorphous materials. (D) Negative correlation between abundances of mafic minerals and amorphous materials. Data in (C) and (D) are adapted from Rampe et al. (34).