[1] Los Alamos Natl Lab, Los Alamos, NM 87544 USA
[2] Univ Copenhagen, Fac Sci, Copenhagen, Denmark
[3] SUNY Stony Brook, Dept Geosci, Stony Brook, NY USA
[4] CALTECH, Div Geol & Planetary Sci, Pasadena, CA 91125 USA
[5] Univ New Mexico, Dept Earth & Planetary Sci, Albuquerque, NM 87131 USA
[6] Malin Space Sci Syst, San Diego, CA USA
[7] Univ Leicester, Dept Phys & Astron, Space Res Ctr, Leicester, Leics, England
[8] Inst Rech Astrophys & Planetol, Toulouse, France
[9] Oregon State Univ, Coll Earth Ocean & Atmospher Sci, Corvallis, OR USA
[10] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD USA
[11] Open Univ, Dept Environm Earth & Ecosyst, Milton Keynes, Bucks, England
[12] Univ Nantes, CNRS, Lab Planetol & Geodynam Nantes, Nantes, France
[13] US Geol Survey, Flagstaff, AZ 86001 USA
[14] Univ Lorraine, GeoRessources, Nancy, France
[15] Planetary Sci Inst, Tucson, AZ USA
[16] NASA, Ames Res Ctr, Moffett Field, CA 94035 USA
[17] Imperial Coll London, Dept Earth Sci & Engn, London, England
[18] IMPMC, Museum Natl Hist Nat, Paris, France
[19] Western Washington Univ, Geol Dept, Bellingham, WA 98225 USA
[20] Brown Univ, Dept Geol Sci, Providence, RI 02912 USA
[21] Univ Guelph, Dept Phys, Guelph, ON, Canada
[22] Univ New Brunswick, Dept Earth Sci, Fredericton, NB, Canada
[23] Space Sci Inst, Boulder, CO USA
[24] Univ Calif Davis, Earth & Planetary Sci, Davis, CA 95616 USA
[25] CALTECH, Jet Prop Lab, Pasadena, CA USA
[26] Space Res Inst, Moscow, Russia