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Perchlorate induced low temperature carbonate decomposition in the Mars Phoenix Thermal and Evolved Gas Analyzer (TEGA) : PERCHLORATE INDUCED CaCO3DECOMPOSITION

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      Detection of perchlorate and the soluble chemistry of martian soil at the Phoenix lander site.

      The Wet Chemistry Laboratory on the Phoenix Mars Lander performed aqueous chemical analyses of martian soil from the polygon-patterned northern plains of the Vastitas Borealis. The solutions contained approximately 10 mM of dissolved salts with 0.4 to 0.6% perchlorate (ClO4) by mass leached from each sample. The remaining anions included small concentrations of chloride, bicarbonate, and possibly sulfate. Cations were dominated by Mg2+ and Na+, with small contributions from K+ and Ca2+. A moderately alkaline pH of 7.7 +/- 0.5 was measured, consistent with a carbonate-buffered solution. Samples analyzed from the surface and the excavated boundary of the approximately 5-centimeter-deep ice table showed no significant difference in soluble chemistry.
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        The search for organic substances and inorganic volatile compounds in the surface of Mars

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          The Sample Analysis at Mars Investigation and Instrument Suite

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            Author and article information

            Journal
            Geophysical Research Letters
            Geophys. Res. Lett.
            American Geophysical Union (AGU)
            00948276
            July 2012
            July 2012
            : 39
            : 13
            : n/a
            10.1029/2012GL051952
            © 2012

            http://doi.wiley.com/10.1002/tdm_license_1.1

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