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      Curiosity at Gale Crater, Mars: Characterization and Analysis of the Rocknest Sand Shadow

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          Saltation of uniform grains in air

          P. R. Owen (1964)
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            The Sample Analysis at Mars Investigation and Instrument Suite

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              Volatile, isotope, and organic analysis of martian fines with the Mars Curiosity rover.

              Samples from the Rocknest aeolian deposit were heated to ~835°C under helium flow and evolved gases analyzed by Curiosity's Sample Analysis at Mars instrument suite. H2O, SO2, CO2, and O2 were the major gases released. Water abundance (1.5 to 3 weight percent) and release temperature suggest that H2O is bound within an amorphous component of the sample. Decomposition of fine-grained Fe or Mg carbonate is the likely source of much of the evolved CO2. Evolved O2 is coincident with the release of Cl, suggesting that oxygen is produced from thermal decomposition of an oxychloride compound. Elevated δD values are consistent with recent atmospheric exchange. Carbon isotopes indicate multiple carbon sources in the fines. Several simple organic compounds were detected, but they are not definitively martian in origin.
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                Author and article information

                Journal
                Science
                Science
                American Association for the Advancement of Science (AAAS)
                0036-8075
                1095-9203
                September 26 2013
                September 26 2013
                : 341
                : 6153
                : 1239505
                Affiliations
                [1 ]MSL Science Team
                Article
                10.1126/science.1239505
                24072928
                46155dab-ef67-46a9-8864-0e4878b4be21
                © 2013
                History

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