Mathematics – Logic
Scientific paper
Apr 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999p%26ss...47..353e&link_type=abstract
Planetary and Space Science, Volume 47, Issue 3-4, p. 353-362.
Mathematics
Logic
19
Scientific paper
The Raman microspectra of the Nakhla SNC meteorite, which probably originates from Mars, are reported here for the first time. The specimen is shown to be heterogeneous, even at a sampling level of 2 μm, but several important mineralogical features have been identified, including clinopyroxene, olivine and plagioclase. In some sampling regions, α-quartz particles are evident and in one sample region the ν(CO2-3) mode of calcite at 1086 cm-1 is found. There is no evidence for organic chemical content detectable in this meteorite specimen, based on an absence of ν(CH) and δ(CH2) modes near 3000 and 1400 cm-1, respectively. Comparative Raman spectroscopic analyses were made on epilithic examples of Xanthoria elegans from Crater Cirque, northern Victoria Land, Antarctica, and cryptoendoliths from East Beacon, McMurdo Dry Valleys, as positive controls for microbial organics in cold, arid habitats analogous to former Martian conditions. Finally, an assessment is made of the potential role of Raman spectroscopy for extra-terrestrial characterisation of geological specimens.
Edwards Howell G. M.
Farwell D. W.
Grady Michael
Wright Ian P.
Wynn-Williams David D.
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