Physics
Scientific paper
Mar 1977
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977rspta.285..207d&link_type=abstract
(Royal Society, Discussion on the Moon - A New Appraisal from Space Missions and Laboratory Analyses, London, England, June 9-12
Physics
1
Crystallization, Lunar Surface, Petrology, Selenology, Supercooling, Basalt, Crystal Growth, Crystal Structure, Lunar Rocks, Olivine, Photomicrographs, Pyroxenes
Scientific paper
Terrestrial analog studies of the phase petrology of supercooled melts and rapid crystal growth are reviewed for possible light shed on lunar crystallization, supercooling, and petrogenic processes, in particular rapid consolidation of lavas extruded on the lunar surface, and impact liquids. Crystallization of major constituent minerals (olivine, pyroxene, plagioclase) in dendritic or skeletal forms is found much more characteristic of lunar igneous rocks than of terrestrial counterparts. Olivine and pyroxene occur often as skeletal phenocrysts, and their stage of crystallization is crucial to the genesis and cooling history of porphyritic lavas. Widespread occurrence of glass and of immature radiate crystallization, particularly of highly zoned pyroxenes and zoned plagioclase, is noted.
Donaldson Colin H.
Drever H. I.
Johnston Rebecca
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