Inorganic analyses of Martian surface samples at the Viking landing sites

Details Inorganic analyses of Martian surface samples at the Viking landing sites Inorganic analyses of Martian surface samples at the Viking landing sites

Dec 1976

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976sci...194.1283c&link_type=abstract

Science, vol. 194, Dec. 17, 1976, p. 1283-1288.

Physics

54

Abundance, Chemical Analysis, Inorganic Materials, Landing Sites, Mars Surface, Viking Lander Spacecraft, Chemical Elements, Fines, Planetary Mantles, Rocks, Viking Mars Program

Scientific paper

Elemental analyses of fines in the Martian regolith at two widely separated landing sites, Chryse Planitia and Utopia Planitia, produced remarkably similar results. At both sites, the uppermost regolith contains abundant Si and Fe, with significant concentrations of Mg, Al, S, Ca, and Ti. The S concentration is one to two orders of magnitude higher, and K (less than 0.25% by weight) is at least 5 times lower than the average for earth's crust. The trace elements Sr, Y, and possibly Zr have been detected at concentrations near or below 100 parts per million. Pebble-sized fragments sampled at Chryse contain more S than the bulk fines and are thought to be pieces of a sulfate-cemented duricrust.

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