Aqueous-alteration products in S-N-C meteorites and implications for volatile/regolith interactions on Mars

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Achondrites, Atmospheric Composition, Geochemistry, Mars (Planet), Mars Atmosphere, Mars Surface, Meteoritic Composition, Minerals, Nakhlites, Planetary Geology, Weathering, Wind Effects, Low Temperature, Petrology, Regolith, Rocks, Sinks, Surface Reactions

Scientific paper

The shergottite, nakhlite, and Chassigny (SNC) meteorites are inferred to be samples from the Martian surface, and so provide a wealth of information on Martian petrology and geochemistry. Because the SNCs are igneous rocks, it has not been obvious that they could reveal much about low-temperature geochemical processes and atmosphere surface interactions on Mars. However, five of the eight SNCs are known to contain low-temperature hydrous minerals and related phase of likely martian origin. Here, we review these martian weathering and alteration products in SNCs and outline possible implications for volatile/regolith interactions and regolith sinks for volatiles on Mars.

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