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Identification of the Ca-sulfate bassanite in Mawrth Vallis, Mars |
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| Authors: | James J Wray Steven W Squyres Janice L Bishop Eldar Z Noe Dobrea |
| Institution: | a Department of Astronomy, Cornell University, Ithaca, NY 14853, USA b Frontier Technology, Inc., 100 Cummings Center, Suite 450G, Beverly, MA 01915, USA c Carl Sagan Center, SETI Institute, Mountain View, CA 94043, USA d Department of Geological Sciences, Brown University, Providence, RI 02912, USA e Planetary Science Institute, 1700 E. Fort Lowell Rd., Suite 106, Tucson, AZ 85719, USA |
| Abstract: | The region surrounding the Mawrth Vallis outflow channel on Mars hosts thick layered deposits containing diverse phyllosilicate minerals. Here we report detection of the Ca-sulfate bassanite on the outflow channel floor, requiring a more complex aqueous chemistry than previously inferred for this region. The sulfate-bearing materials underlie phyllosilicate-bearing strata, and provide an opportunity for testing proposed models of martian geochemical evolution with a future landed mission. |
| Keywords: | Mars Surface Mineralogy Spectroscopy |
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