Computer Science
Scientific paper
Mar 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977rspta.285..177o&link_type=abstract
(Royal Society, Discussion on the Moon - A New Appraisal from Space Missions and Laboratory Analyses, London, England, June 9-12
Computer Science
Basalt, Crystal Growth, Lunar Crust, Lunar Evolution, Lunar Gravitational Effects, Lunar Rocks, Chemical Composition, Lava, Petrography, Selenology
Scientific paper
Quenching crystals are of common occurrence in experimental charges; such growths plus their groundmass are usually interpreted as evidence of the existence of an entirely liquid system of the appropriate bulk composition at the temperature of the experiment. The inherent assumption in this interpretation is that the cooling rates are so fast that the skeletal crystals will not sink appreciably through the remaining liquid before its viscosity has reached some prohibitively high value due to the decline in temperature. This paper examines whether this assumption is justified for the lunar low-Ti basalts of Oceanus Procelarum and Palus Putredenis. The effects of a lower gravitational field of the moon (as compared to the earth), which would make crystal sinking a less efficient process, might have been more than compensated by the much lower viscosity of lunar lavas.
Humphries D. J.
Ohara M. J.
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