¹E. Dobrică, ²R. C. Ogliore
¹Department of Earth and Planetary Sciences MSC03-2040, 1 University of New Mexico, Albuquerque 87131-0001, NM, USA
²Department of Physics, Washington University in St. Louis, St. Louis 63117, MO, USA

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Reference
Dobrică E, Ogliore RC (2016) Adhering grains and surface features on two Itokawa particles. Earth, Planets and Space 68:21
Link to Article [doi:10.1186/s40623-016-0391-7]

^1,2Derek W.G. Sears, ^1,2Hazel Sears, ^1,2Daniel R. Ostrowski, ^1,2Kathryne L. Bryson,
¹Jessie Dotson, ³Megan Syal, ³Damian C Swift
¹NASA Ames Research Center, Mountain View, CA 94035, USA
²Bay Area Environmental Research Institute, NASA Ames Research Center, Mountain View, CA 94035, USA
³Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, CA 94550, USA

We currently do not have a copyright agreement with this publisher and cannot display the abstract here

Reference
Sears DWG, Sears H, Ostrowski DR, Bryson KL, Dotson J, Syal M, Swift DC (2016) A meteorite perspective on asteroid hazard mitigation. Planetary and Space Science (in Press)
Link to Article [doi:10.1016/j.pss.2016.01.016]

¹Yang Liu, ²Jeffrey G. Catalano
¹Southwest Research Institute, San Antonio, Texas, USA
²Department of Earth and Planetary Sciences, Washington University in St. Louis, St. Louis, Missouri, USA

Using visible and near infrared data from the Compact Reconnaissance Imaging Spectrometer for Mars (CRISM), we identified a sequence of hydrated sulfates and Fe/Mg-smectites in southwest Melas Chasma. Specifically, these hydrated sulfate and semectite deposits are interbedded and have been highly deformed. Equilibrium thermodynamic calculations of coupled basalt weathering and fluid evaporation predict that sequential formation of Fe/Mg-smectites and sulfate evaporites in similar quantities, as observed in the interbedded smectite-sulfate sequences, is chemically plausible. The Fe/Mg-smectite-sulfate deposits may have thus formed through in situ basalt weathering and fluid evaporation, although an origin involving repeated cycles of transport and deposition of detrital clays by a neutral fluid containing Mg and SO4 and subsequent evaporation cannot be ruled out. If the Fe/Mg-smectites are authigenic, the Hesperian (or younger) age Melas Chasma would have experienced prolonged periods with near-surface water, providing potentially habitable conditions.

Reference
Liu Y, Catalano JG (2016) Implications for the Aqueous History of Southwest Melas Chasma, Mars as Revealed by Interbedded Hydrated Sulfate and Fe/Mg-Smectite Deposits. Icarus (in Press)
Link to Article [doi:10.1016/j.icarus.2016.02.015]
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