Seepages and the astrobiological potential of polar dunes on Mars
Kereszturi, A. and Möhlmann, D. and Berczi, Sz. and Ganti, T. and Horvath, A. and Kuti, A. and Sik, A. (2010) Seepages and the astrobiological potential of polar dunes on Mars. In: Astrobiology: Physical Origin, Biological Evolution and Spatial Distribution Space Science, Exploration and Policies. Nova Science Publishers. pp. 97-113. ISBN 978-1-60741-290-8.
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At the polar dunes of Mars branching dark slope streaks emanate from Dark Dune Spots were observed in local springtime on MOC and HiRISE image. They seep downward with speed of 1.4 meter/sol when the temperature of the terrain on 3 km spatial resolution is between 180 and 250 K. Theoretical considerations and calculations suggest interfacial liquid-like water have to be present on the Mars, and probably cause the observed seepage features. The thin water lubricated grains may slide over each other, and/or the stress caused by the refreezing of this interfacial wate could also produce such markings, as well as the moving front of solid ice/liquid water phase changes. Such ephemerally wet environment between the dune grains may have astrobiological significance.
|Document Type:||Book Section|
|Title:||Seepages and the astrobiological potential of polar dunes on Mars|
|Journal or Publication Title:||Astrobiology: Physical Origin, Biological Evolution and Spatial Distribution|
|Page Range:||pp. 97-113|
|Publisher:||Nova Science Publishers|
|Series Name:||Space Science, Exploration and Policies|
|Keywords:||Mars, polar dunes, water, dark dune spots|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Space|
|HGF - Program Themes:||W EW - Erforschung des Weltraums|
|DLR - Research area:||Space|
|DLR - Program:||W EW - Erforschung des Weltraums|
|DLR - Research theme (Project):||W - Vorhaben Vergleichende Planetologie (old)|
|Institutes and Institutions:||Institute of Planetary Research|
|Deposited By:||Susanne Pieth|
|Deposited On:||12 Oct 2010 13:54|
|Last Modified:||12 Oct 2010 13:54|
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