Feb 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981icar...45..370c&link_type=abstract
Icarus, vol. 45, Feb. 1981, p. 370-378.
Physics
182
Inorganic Compounds, Mars Surface, Planetary Composition, Regolith, Atmospheric Moisture, Brines, Viking Lander Spacecraft, Weathering, Mars, Salts, Regolith, Enrichment, Concentrations, Chemistry, Acidity, Weathering, Volatile Elements, Geochemistry, Phisiochemistry, Nitrates, Formation, Temperatures, Water Vapor, Surface, Theoretical Studies, Source Medium, Sulfates, Chlorides, Carbonates, Samples, Martian
Scientific paper
Salt compounds are apparently an important component of the fine-grained regolith on Mars. Salt enrichment may be explained either as a secondary concentration of chemical weathering products or as direct incorporation of planetary released volatiles. Geochemical measurements and chemical relationships constrain the salt species and resultant physicochemical consequences. A likely assemblage is dominated by (Mg,Na)SO4, NaCl, and (Mg,Ca)CO3. Formation of brine in equilibrium with such a salt mixture is unlikely under the temperature and water-vapor restrictions prevalent over most, if not all, of the Martian surface. Acidic conditions, accompanying salt formation, favor the preferential destruction of susceptible igneous minerals.
Clark Ben C.
van Hart D. C.
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