Abstract：
:The primary objective of NASA's Mars Science Laboratory (MSL) mission, which will launch in 2011, is to characterize the habitability of a site on Mars through detailed analyses of the composition and geological context of surface materials. Within the framework of established mission goals, we have evaluated the value of a possible landing site in the Mawrth Vallis region of Mars that is targeted directly on some of the most geologically and astrobiologically enticing materials in the Solar System. The area around Mawrth Vallis contains a vast (>1 × 10⁶ km²) deposit of phyllosilicate-rich, ancient, layered rocks. A thick (>150 m) stratigraphic section that exhibits spectral evidence for nontronite, montmorillonite, amorphous silica, kaolinite, saponite, other smectite clay minerals, ferrous mica, and sulfate minerals indicates a rich geological history that may have included multiple aqueous environments. Because phyllosilicates are strong indicators of ancient aqueous activity, and the preservation potential of biosignatures within sedimentary clay deposits is high, martian phyllosilicate deposits are desirable astrobiological targets. The proposed MSL landing site at Mawrth Vallis is located directly on the largest and most phyllosilicate-rich deposit on Mars and is therefore an excellent place to explore for evidence of life or habitability.
journal_name
Astrobiologyjournal_title
Astrobiologyauthors
Michalski JR,Jean-PierreBibring,Poulet F,Loizeau D,Mangold N,Dobrea EN,Bishop JL,Wray JJ,McKeown NK,Parente M,Hauber E,Altieri F,Carrozzo FG,Niles PBdoi
10.1089/ast.2010.0491subject
Has Abstractpub_date
2010-09-01 00:00:00pages
687-703issue
7eissn
1531-1074issn
1557-8070journal_volume
10pub_type
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