Oxidation of manganese in an ancient aquifer, Kimberley formation, Gale crater, Mars
Copyright policy )Oxidation of manganese in an ancient aquifer, Kimberley formation, Gale crater, Mars
AbstractThe Curiosity rover observed high Mn abundances (>25 wt % MnO) in fracture‐filling materials that crosscut sandstones in the Kimberley region of Gale crater, Mars. The correlation between Mn and trace metal abundances plus the lack of correlation between Mn and elements such as S, Cl, and C, reveals that these deposits are Mn oxides rather than evaporites or other salts. On Earth, environments that concentrate Mn and deposit Mn minerals require water and highly oxidizing conditions; hence, these findings suggest that similar processes occurred on Mars. Based on the strong association between Mn‐oxide deposition and evolving atmospheric dioxygen levels on Earth, the presence of these Mn phases on Mars suggests that there was more abundant molecular oxygen within the atmosphere and some groundwaters of ancient Mars than in the present day.
- Justus Liebig University Giessen Germany
- Purdue University West Lafayette United States
- Sorbonne University France
- Sorbonne Paris Cité France
- University of Mary United States
Manganese, LIBS, 550, oxidation, QC801-809, Geophysics. Cosmic physics, 500, Mars, 523, Mars Science Laboratory, [SDU] Sciences of the Universe [physics], [SDU]Sciences of the Universe [physics], ChemCam, manganese, MSL
Manganese, LIBS, 550, oxidation, QC801-809, Geophysics. Cosmic physics, 500, Mars, 523, Mars Science Laboratory, [SDU] Sciences of the Universe [physics], [SDU]Sciences of the Universe [physics], ChemCam, manganese, MSL
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