ArticleScience advances2022
Alteration history of Séítah formation rocks inferred by PIXL x-ray fluorescence, x-ray diffraction, and multispectral imaging on Mars.
Article in Science advances, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
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13 citing papers in PubMed, 89 citations in OpenAlex.
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- In situ crystallographic mapping constrains sulfate precipitation and timing in Jezero crater, Mars.Science advances · 2025Article
- Formation and Stability of the Propionitrile:Acetylene Co-Crystal Under Titan-Relevant Conditions.ACS earth & space chemistry · 2025Article
- Diverse and highly differentiated lava suite in Jezero crater, Mars: Constraints on intracrustal magmatism revealed by Mars 2020 PIXL.Science advances · 2025Article
- Sampling Mars: Geologic context and preliminary characterization of samples collected by the NASA Mars 2020 Perseverance Rover Mission.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Evidence for a composite volcano on the rim of Jezero crater on Mars.Communications earth & environment · 2025Article
- Inorganic interpretation of luminescent materials encountered by the Perseverance rover on Mars.Science advances · 2024Article
- Present-day thermal and water activity environment of the Mars Sample Return collection.Scientific reports · 2024Article
- Experimental formation of carbonates from perchlorate and sulphate brines: Implications for Jezero crater, Mars.PloS one · 2024Article
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Authors and funding
28 authors at 18 institutions in 6 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Collocated crystal sizes and mineral identities are critical for interpreting textural relationships in rocks and testing geological hypotheses, but it has been previously impossible to unambiguously constrain these properties using in situ instruments on Mars rovers. Here, we demonstrate that diffracted and fluoresced x-rays detected by the PIXL instrument (an x-ray fluorescence microscope on the Perseverance rover) provide information about the presence or absence of coherent crystalline domains in various minerals. X-ray analysis and multispectral imaging of rocks from the Séítah formation on the floor of Jezero crater shows that they were emplaced as coarsely crystalline igneous phases. Olivine grains were then partially dissolved and filled by finely crystalline or amorphous secondary silicate, carbonate, sulfate, and chloride/oxychlorine minerals. These results support the hypothesis that Séítah formation rocks represent olivine cumulates altered by fluids far from chemical equilibrium at low water-rock ratios.
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