Other
Scientific paper
Aug 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006nimpb.249..571w&link_type=abstract
Nuclear Instruments and Methods in Physics Research Section B, Volume 249, Issue 1-2, p. 571-574.
Other
Antarctica, Environmental Studies, Rutherford Backscattering, And Other Methods Of Chemical Analysis
Scientific paper
In some zones of Antarctica’s cold and dry desert, the extinction of cryptoendolithic microorganisms leaves behind inorganic traces of microbial life. The extinction of these microorganisms is considered to be the best terrestrial analogue of the disappearance of possible life on early Mars. In the present study, sandstone rock samples from several sites of the Dry Valleys known to harbour endolithic microorganisms, as well as samples with microbial fossils, were analysed by proton induced X-ray emission (PIXE). Our findings suggest significant differences in major element concentrations among the different zones within the same sample. In some sample fractions, these differences could be considered as traces of the microbial origin. However, other samples reveal contamination produced by allochthonous minerals of abiogenetic origin.
Ager F. J.
Ascaso Carmen
Carmona-Luque A.
García-Orellana I.
Respaldiza M. Á.
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