Spectrophotometry of the rocks coloured by the iron oxides as likely analogs of Mars soil

Details Spectrophotometry of the rocks coloured by the iron oxides as likely analogs of Mars soil Spectrophotometry of the rocks coloured by the iron oxides as likely analogs of Mars soil

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993avest..27...56t&link_type=abstract

Astronomicheskij Vestnik (ISSN 0320-930X), vol. 27, no. 5, p. 56-65

Astronomy and Astrophysics

Astronomy

Basalt, Glass, Iron Oxides, Mars (Planet), Mars Surface, Silicates, Soils, Spectral Reflectance, Color, Rocks, Spectrophotometry

Scientific paper

Using the similarity of weather processes of the Martian surface rocks and the rocks of Earth's continental surface with arid climate samples of iron-containing phyllosilicates and palagonite as likely analogs of Mars soil were selected. Goethite (alpha-FeOOH) and hematite (alpha-Fe2O3) are the coloring pigments in all the cases. The comparison of rocks' reflectance spectra obtained in 0.37 - 1.1 micrometers range with goethite and hematite spectra allow the following conclusions which are of interest when interpreted with Mars surface reflectance spectra: the form of the rocks' spectra is determined to a considerable extent by what mineral association the coloring phase of goethite and hermatite are dispersed; the absorption band at 0.9 micrometer in some yellow clays' spectra occupies more longwave positions than in the clear goethite spectra; the dependence of the description of the rocks' reflectance spectra on the degree of their exogenous changes is not obvious.

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