Inorganic Analyses of Martian Surface Samples at the Viking Landing Sites

@article{Clark1976InorganicAO,
  title={Inorganic Analyses of Martian Surface Samples at the Viking Landing Sites},
  author={Benton C. Clark and Alex K. Baird and Harry J. Rose and Priestley Toulmin and Klaus Keil and Angelo J. Castro and Warren C. Kelliher and Cathy Rowe and Peter H. Evans},
  journal={Science},
  year={1976},
  volume={194},
  pages={1283 - 1288}
}
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(<0.25 percent by weight) is at least 5 times lower than the average for the earth's crust. The trace elements Sr, Y, and possibly Zr, have… 

Chemical composition of Martian fines

Of the 21 samples acquired for the Viking X ray fluorescence spectrometer, 17 were analyzed to high precision. Compared to typical terrestrial continental soils and lunar mare fines, the Martian

Mineralogic and Petrologic Implications of Viking Geochemical Results From Mars: Interim Report

The mafic nature of the present fines and their probable source rocks seems to preclude large-scale planetary differentiation of a terrestrial nature.

Geochemical and mineralogical interpretation of the Viking inorganic chemical results

The elemental analyses whose basis is described in the preceding two papers represent the composition of samples of Martian fines; the only undetermined major constituents thought to be present are

The geology of the Viking lander 2 site

Viking Lander 2 landed on a flat plain of fine-grained sediment overlain by dispersed, evenly distributed boulders. The fine-grained material is probably part of a high-latitude mantle comprising

Experimental studies of Mars‐analog brines

Evaporite deposits may represent significant sinks of mobile cations (e.g., those of Ca, N, Mg, and Fe) and anions (e.g., those of C, N, S, and Cl) among the materials composing the Martian surface

Volatiles in the Martian regolith

An inventory of released volatiles on Mars has been derived based upon Viking measurements of atmospheric and surface chemical composition, and upon the inferred mineralogy of a ubiquitous regolith,

Sulfur on Mars

The sulfur cycle is arguably the most important geochemical cycle on Mars because the transfer of sulfur places limits on Mars's differentiation processes, sedimentary, geomorphic and aqueous
...

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Mineralogic and Petrologic Implications of Viking Geochemical Results From Mars: Interim Report

The mafic nature of the present fines and their probable source rocks seems to preclude large-scale planetary differentiation of a terrestrial nature.

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Appendix 2, along with the entire paper, is available in microfiche. Order from the American Geophysical Union, 1707 L Street; N.W., Washington, D.C. 20036. Document J72-002; $1.00. Payment must