Hydrogen Variability in the Murray Formation, Gale Crater, Mars
| Autor: | Frances Rivera-Hernandez, William Rapin, Travis Gabriel, Sylvestre Maurice, Roger C. Wiens, Bethany L. Ehlmann, P.-Y. Meslin, Nathaniel Stein, Jens Frydenvang, N. H. Thomas |
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| Přispěvatelé: | Institut de recherche en astrophysique et planétologie (IRAP), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire Midi-Pyrénées (OMP), Institut de Recherche pour le Développement (IRD)-Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Météo-France -Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Atmospheres
aqueous geochemistry 010504 meteorology & atmospheric sciences Hydrogen Mars Science Laboratory Curiosity rover Geochemistry Mars chemistry.chemical_element 01 natural sciences Planetary Geochemistry Planetary Sciences: Solar System Objects Geochemistry and Petrology Earth and Planetary Sciences (miscellaneous) Aqueous geochemistry Planetary Sciences: Solid Surface Planets Planetary Sciences: Fluid Planets Research Articles 0105 earth and related environmental sciences geography geography.geographical_feature_category Bedrock Mars Exploration Program Composition of the Planets Geophysics chemistry Space and Planetary Science [SDU]Sciences of the Universe [physics] hydrogen Sample Analysis at Mars Dynamic Albedo of Neutrons Investigations of Vera Rubin Ridge Gale Crater Planetary Sciences: Comets and Small Bodies Sedimentary rock Deposition (chemistry) Composition Research Article |
| Zdroj: | Journal of Geophysical Research: Planets Journal of Geophysical Research: Planets, 2020, 125, ⟨10.1029/2019JE006289⟩ Thomas, N H, Ehlmann, B L, Rapin, W, Rivera-hernández, F, Stein, N T, Frydenvang, J, Gabriel, T, Meslin, P, Maurice, S & Wiens, R C 2020, ' Hydrogen Variability in the Murray Formation, Gale Crater, Mars ', Journal of Geophysical Research: Planets, vol. 125, no. 9, pp. 1-13 . https://doi.org/10.1029/2019JE006289 Journal of Geophysical Research. Planets |
| DOI: | 10.1029/2019JE006289⟩ |
| Popis: | The Mars Science Laboratory (MSL) Curiosity rover is exploring the Murray formation, a sequence of heterolithic mudstones and sandstones recording fluvial deltaic and lake deposits that comprise over 350 m of sedimentary strata within Gale crater. We examine >4,500 Murray formation bedrock points, employing recent laboratory calibrations for ChemCam laser‐induced breakdown spectroscopy H measurements at millimeter scale. Bedrock in the Murray formation has an interquartile range of 2.3–3.1 wt.% H2O, similar to measurements using the Dynamic Albedo of Neutrons and Sample Analysis at Mars instruments. However, specific stratigraphic intervals include high H targets (6–18 wt.% H2O) correlated with Si, Mg, Ca, Mn, or Fe, indicating units with opal, hydrated Mg sulfates, hydrated Ca sulfates, Mn‐enriched units, and akageneite or other iron oxyhydroxides, respectively. One stratigraphic interval with higher hydrogen is the Sutton Island unit and Blunts Point unit contact, where higher hydrogen is associated with Fe‐rich, Ca‐rich, and Mg‐rich points. A second interval with higher hydrogen occurs in the Vera Rubin ridge portion of the Murray formation, where higher hydrogen is associated with Fe‐rich, Ca‐rich, and Si‐rich points. We also observe trends in the H signal with grain size, separate from chemical variation, whereby coarser‐grained rocks have higher hydrogen. Variability in the hydrogen content of rocks points to a history of water‐rock interaction at Gale crater that included changes in lake water chemistry during Murray formation deposition and multiple subsequent groundwater episodes. Key Points Murray formation bedrock points measured by ChemCam have an interquartile range of 2.3–3.1 wt.% H2OSpecific intervals like the Vera Rubin ridge contain high H and indicate phases including iron oxyhydroxides, akageneite, and jarositeVariations in water content indicate changes in depositional lake water chemistry and multiple subsequent groundwater episodes |
| Databáze: | OpenAIRE |
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