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    Morphological biosignatures from relict fossilised sedimentary geological specimens: a Raman spectroscopic study

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    Publication date
    2007
    Author
    Edwards, Howell G.M.
    Jorge Villar, Susana E.
    Pullan, D.
    Hargreaves, Michael D.
    Hofmann, B.A.
    Westall, F.
    Keyword
    Mars analogues
    ; Raman spectroscopy
    ; Spectral biosignatures
    ; Biogeological modification
    ; ExoMars instrumentation
    Peer-Reviewed
    Yes
    
    Metadata
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    Abstract
    Morphological biosignatures (features related to life) and associated terrestrial sedimentary structures that provide possible sampling targets for the remote astrobiological exploration of planets have been analysed using Raman spectroscopic techniques. The spectral data from a suite of samples comprising crypto-chasmoendoliths, preserved microbial filaments and relict sedimentary structures comprise a preliminary database for the establishment of key Raman biosignatures. This will form the basis for the evaluation of prototype miniaturised instrumentation for the proposed ESA ExoMars mission scheduled for 2013. The Raman spectral biosignatures of carotenoids and scytonemin, organic biomolecules characteristic of the cyanobacterial colonisation of geological matrices and biogeologically modified minerals are also identifiable in the sedimentary specimen materials. The results of this study demonstrate the basis of the molecular recognition of extinct and extant exobiology that will feed into the elemental structural analyses of morphological structures provided by associated SEM, XRD and laser-induced breakdown spectroscopy (LIBS) techniques on robotic analytical landers.
    URI
    http://hdl.handle.net/10454/4005
    Version
    No full-text available in the repository
    Citation
    Edwards HGM, Jorge-Villar SE, Pullan D, Hargreaves MD et al. (2007) Morphological biosignatures from relict fossilised sedimentary geological specimens: a Raman spectroscopic study. Journal of Raman Spectroscopy. 38(10): 1352-1361.
    Link to publisher’s version
    http://dx.doi.org/10.1002/jrs.1775
    Type
    Article
    Collections
    Life Sciences Publications

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