SUN, Vivian1, HAND, Kevin P.1, FARLEY, Kenneth A.2, STACK MORGAN, Kathryn1, WILLIFORD, Kenneth H.1, MILKOVICH, Sarah1, KRONYAK, Rachel1, BELL III, JAMES3, SHUSTER, David4 and SIMON, Justin I.5, (1)Jet Propulsion Laboratory, California Institute of Technology, Pasadena, CA 91109, (2)Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, (3)School of Earth & Space Exploration, Arizona State University, Tempe, AZ 85287, (4)Earth and Planetary Science Department, University of California, Berkeley, Berkeley, CA 94720-4767, (5)NASA Johnson Space Center, Houston, TX 77058