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Preliminary results from the viking x-ray fluorescence experiment: The first sample from chryse planitia, Mars

Science

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Abstract

Iron, calcium, aluminum, silicon, and sulfur are major elements in the first surface sample of Mars that has been analyzed by the Viking x-ray fluorescence spectrometer. Titanium is present in minor quantities. This is consistent with the sample being a mixture of fine silicate and oxide mineral grains, with a significant proportion of sulfates, possibly hydrated. Ferric oxide is regarded as the red pigmenting agent on the martian surface, but if it coats silicate grains, the coatings must be very thin (??? 2 micrometers) or discontinuous. A high abundance of Fe, relatively low abundances of Al, Rb, Sr, and Zr, and a high Ca/K ratio are distinctive features of the spectra. Preliminary determinations indicate the following abundances (as percentages by weight): Fe, 14 ?? 2; Ti < 1; S, 2 to 5; the Ca/K ratio by weight is greater than 5.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Preliminary results from the viking x-ray fluorescence experiment: The first sample from chryse planitia, Mars
Series title:
Science
Volume
194
Issue:
4260
Year Published:
1976
Language:
English
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
First page:
81
Last page:
84
Number of Pages:
4