2022
DOI: 10.1002/essoar.10510270.1
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Statistical analysis of APXS-derived chemistry of the clay-bearing Glen Torridon region and Mount Sharp group, Gale crater, Mars

Abstract: The Glen Torridon stratigraphic sequence marks the transition from the low energy lacustrine-dominated Murray formation (Mf) (Jura member: Jm) to the more diverse Carolyn Shoemaker formation (CSf) (Knockfarril Hill member: KHm; Glasgow member: Gm), indicating a change in overall depositional setting. Alpha Particle X-ray Spectrometer (APXS) results and statistical analysis reveals that the bulk primary geochemistry of Mf targets are broadly in family with CSf targets, but with subtle compositional and diagenet… Show more

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Cited by 13 publications
(36 citation statements)
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“…The GR drill area is known to be generally enriched in Mn (the MnO abundance detected in the GR drill sample by APXS was 1.07 ± 0.03 wt. %, O’Connell‐Cooper et al., 2022). One possible host would be trace or amorphous Mn oxides (Mn oxides were not detected by CheMin), and Mn can occur in several oxidation states in oxides.…”
Section: Results and Interpretationmentioning
confidence: 99%
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“…The GR drill area is known to be generally enriched in Mn (the MnO abundance detected in the GR drill sample by APXS was 1.07 ± 0.03 wt. %, O’Connell‐Cooper et al., 2022). One possible host would be trace or amorphous Mn oxides (Mn oxides were not detected by CheMin), and Mn can occur in several oxidation states in oxides.…”
Section: Results and Interpretationmentioning
confidence: 99%
“…MSL’s Alpha Particle X‐ray Spectrometer (APXS) instrument enabled determination of the bulk chemistry of drilled rock powders delivered to SAM, by analyzing drill fines dropped from the drill bit or drill tailings (e.g., O’Connell‐Cooper et al., 2022). In APXS analyses, a combination of alpha particles and X‐rays are used to excite emission of characteristic X‐rays from the elements in a sample.…”
Section: Methodsmentioning
confidence: 99%
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“…These two endmembers are mainly discriminated based on their MgO and K 2 O contents (Dehouck et al, 2021(Dehouck et al, , 2022O'Connell-Cooper et al, 2022). The "rubbly" endmember shows a K 2 O-rich (>1.5 wt.%) and MgO-poor (usually <6 wt.%) composition, defined as the regional Type 2 composition by Dehouck et al (2022).…”
Section: Relation Between the Studied Facies And Regional Geochemical...mentioning
confidence: 99%