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    Fourier transform infrared spectral detection of life in polar subsurface environments and its application to Mars exploration

    Preston, Louisa and Johnson, D. and Cockell, C.S. and Grady, M.M. (2015) Fourier transform infrared spectral detection of life in polar subsurface environments and its application to Mars exploration. Applied Spectroscopy 69 (9), pp. 1059-1065. ISSN 0003-7028.

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    Abstract

    Cryptoendolithic lichen communities of the Dry Valleys, Antarctica, survive in an extremely inhospitable environment, finding refuge in microscopic niches where conditions suitable for life exist. Such ‘‘within-rock’’ communities may have evolved on Mars when conditions for life on the surface deteriorated to such an extent that they could no longer survive. Fourier transform infrared spectroscopy of unprepared whole-rock Antarctic Beacon sandstones was used to vertically profile molecular vibrations of fatty acids, proteins, and carboxylic acids created by endolithic communities. Spectral biosignatures were found localized to lichen-rich areas and were absent in crustal regions and the bulk rock substrate. These cryptoendolithic profiles will aid similar spectroscopic investigations of organic biosignatures during future Martian subsurface studies and will help in the identification of similar communities in other localities across the Earth.

    Metadata

    Item Type: Article
    Keyword(s) / Subject(s): Fourier transform infrared spectroscopy, FT-IR, Biosignature, Organics, Cryptoendoliths, Antarctica, Mars
    School: Birkbeck Schools and Departments > School of Science > Earth and Planetary Sciences > UCL/Birkbeck Centre for Planetary Sciences
    Birkbeck Schools and Departments > School of Science > Earth and Planetary Sciences
    Depositing User: Louisa Preston
    Date Deposited: 02 Sep 2016 14:02
    Last Modified: 01 Aug 2019 05:53
    URI: http://eprints.bbk.ac.uk/id/eprint/15852

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