Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/33652
Share/Impact:
Título : Identifying elements in rocks from the Dry Valleys desert (Antarctica) by ion beam proton induced X-ray emission
Autor : Wierzchos, Jacek, Ascaso, Carmen, Ager, F. J., García-Orellana, Isabel, Carmona, Asunción, Respaldiza, M. A.
Palabras clave : Antarctica
Biomarkers
Dry Valleys
Endoliths
Fossils
PIXE
Fecha de publicación : 2006
Editor: Elsevier
Citación : Nuclear Instruments and Methods in Physics Research B 249(1-2): 571-574 (2006)
Resumen: 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.
Versión del editor: http://dx.doi.org/10.1016/j.nimb.2006.03.057
URI : http://hdl.handle.net/10261/33652
ISSN: 0168-583X
DOI: 10.1016/j.nimb.2006.03.057
Citación : Nuclear Instruments and Methods in Physics Research B 249(1-2): 571-574 (2006)
Appears in Collections:(CNA) Artículos
(CCMA) Artículos

Files in This Item:
File Description SizeFormat 
accesoRestringido.pdf15,38 kBAdobe PDFView/Open
Show full item record
 
CSIC SFX LinksSFX Query


Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.