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    Limits on methane release and generation via hypervelocity impact of Martian analogue materials

    Access Status
    Fulltext not available
    Authors
    Price, M.
    Ramkissoon, N.
    McMahon, S.
    Miljkovic, Katarina
    Parnell, J.
    Wozniakiewicz, P.
    Kearsley, A.
    Blamey, N.
    Cole, M.
    Burchell, M.
    Date
    2014
    Type
    Journal Article
    
    Metadata
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    Citation
    Price, M. and Ramkissoon, N. and McMahon, S. and Miljkovic, K. and Parnell, J. and Wozniakiewicz, P. and Kearsley, A. et al. 2014. Limits on methane release and generation via hypervelocity impact of Martian analogue materials. International Journal of Astrobiology. 13 (2): pp. 132-140.
    Source Title
    International Journal of Astrobiology
    DOI
    10.1017/S1473550413000384
    ISSN
    1473-5504
    School
    Department of Applied Geology
    URI
    http://hdl.handle.net/20.500.11937/51808
    Collection
    • Curtin Research Publications
    Abstract

    The quantity of methane in Mars' atmosphere, and the potential mechanism(s) responsible for its production, are still unknown. In order to test viable, abiotic, methangenic processes, we experimentally investigated two possible impact mechanisms for generating methane. In the first suite of experiments, basaltic rocks were impacted at 5 km s-1 and the quantity of gases (CH4, H2, He, N2, O2, Ar and CO 2) released by the impacts was measured. In the second suite of experiments, a mixture of water ice, CO2 ice and anhydrous olivine grains was impacted to see if the shock induced rapid serpentinization of the olivine, and thus production of methane. The results of both suites of experiments demonstrate that impacts (at scales achievable in the laboratory) do not give rise to detectably enhanced quantities of methane release above background levels. Supporting hydrocode modelling was also performed to gain insight into the pressures and temperatures occurring during the impact events. Copyright © Cambridge University Press 2013.

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