Computer Science
Scientific paper
Mar 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990icar...84...93s&link_type=abstract
Icarus (ISSN 0019-1035), vol. 84, March 1990, p. 93-105. Research supported by NASA.
Computer Science
46
Diffusion Coefficient, Lunar Atmosphere, Mercury Atmosphere, Meteoritic Composition, Potassium, Sodium, Kreep, Planetary Crusts, Regolith, Planets, Moon, Mercury (Planet), Sodium, Potassium, Diffusion, Source, Atmosphere, Crust, Regolith, Abundance, Thermal Effects, Temperature, Volatilization, Impact Effects, Surface, Sputtering, Bombardment, Gardening, Depletion, Comparisons, Models, Parameters, Diagrams, Theoretical Studies
Scientific paper
Deep grain-boundary diffusion and regolith diffusion through a fractured crust and regolith can account not only for the Na/K ratios observed in the Mercurian and lunar atmospheres, but the large Na abundance enhancement of Mercury over lunar levels. A hot component of Na and K at Mercury is noted to be smaller in proportion to the total abundances of these two constituents than at the moon; this hot component is consistent with a population of meteoritic substances similar to lunar ones, as well as with a surface composition which has undergone no greater K depletion than that of the moon.
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