Add to ORKGFe oxidation processes may have occurred during groundwater-mediated diagenesis in Meridiani Planum sediments. To address this question, melanterite oxidation experiments were conducted at epsomite saturation as a function of pH. Results show that schwertmannite is initially formed from acidic Fe oxidation and that its formation and aging to mixtures of jarosite and nanocrystalline goethite is strongly controlled by pH over the range b <2.0-4.0. The pH is controlled in turn by Fe oxidation and Fe3+ hydrolysis. In one 77-d oxidation experiment, nanocrystalline hematite was tentatively identified by MC6ssbauer spectroscopy. Accordingly, aging experiments with synthetic nanocrystalline goethite were conducted (1) to further resolve the formati...
Observations from in situ experiments and planetary orbiters have shown that the sedimentary rocks f...
International audienceThe origin of iron bearing phases in the Martian regolith is usually interpret...
International audienceThe origin of iron bearing phases in the Martian regolith is usually interpret...
Fe oxidation processes may have occurred during groundwater-mediated diagenesis in Meridiani Planum ...
Fe oxidation processes may have occurred during groundwater-mediated diagenesis in Meridiani Planum ...
Fe oxidation processes may have occurred during groundwater-mediated diagenesis in Meridiani Planum ...
We are performing oxidation and reduction reactions on hydrated ferric oxide minerals in order to in...
Observations from in situ experiments and planetary orbiters have shown that the sedimentary rocks f...
Observations from in situ experiments and planetary orbiters have shown that the sedimentary rocks f...
International audienceSulfates and Fe-oxides identified on the Martian surface by orbital and in sit...
International audienceSulfates and Fe-oxides identified on the Martian surface by orbital and in sit...
Observations from in situ experiments and planetary orbiters have shown that the sedimentary rocks f...
The physical and chemical weathering of iron and magnesium silicates can provide important insights ...
International audienceThe origin of iron bearing phases in the Martian regolith is usually interpret...
Observations from in situ experiments and planetary orbiters have shown that the sedimentary rocks f...
Observations from in situ experiments and planetary orbiters have shown that the sedimentary rocks f...
International audienceThe origin of iron bearing phases in the Martian regolith is usually interpret...
International audienceThe origin of iron bearing phases in the Martian regolith is usually interpret...
Fe oxidation processes may have occurred during groundwater-mediated diagenesis in Meridiani Planum ...
Fe oxidation processes may have occurred during groundwater-mediated diagenesis in Meridiani Planum ...
Fe oxidation processes may have occurred during groundwater-mediated diagenesis in Meridiani Planum ...
We are performing oxidation and reduction reactions on hydrated ferric oxide minerals in order to in...
Observations from in situ experiments and planetary orbiters have shown that the sedimentary rocks f...
Observations from in situ experiments and planetary orbiters have shown that the sedimentary rocks f...
International audienceSulfates and Fe-oxides identified on the Martian surface by orbital and in sit...
International audienceSulfates and Fe-oxides identified on the Martian surface by orbital and in sit...
Observations from in situ experiments and planetary orbiters have shown that the sedimentary rocks f...
The physical and chemical weathering of iron and magnesium silicates can provide important insights ...
International audienceThe origin of iron bearing phases in the Martian regolith is usually interpret...
Observations from in situ experiments and planetary orbiters have shown that the sedimentary rocks f...
Observations from in situ experiments and planetary orbiters have shown that the sedimentary rocks f...
International audienceThe origin of iron bearing phases in the Martian regolith is usually interpret...
International audienceThe origin of iron bearing phases in the Martian regolith is usually interpret...