Computer Science
Scientific paper
Apr 1976
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1976lpsc....7..743i&link_type=abstract
In: Lunar Science Conference, 7th, Houston, Tex., March 15-19, 1976, Proceedings. Volume 1. (A77-34651 15-91) New York, Pergamon
Computer Science
Chondrule, Crystallization, Lunar Soil, Petrography, Silicates, Anorthosite, Breccia, Chemical Composition, Lunar Composition, Lunar Geology, Lunik 16 Lunar Probe, Lunik 20 Lunar Probe, Solidification
Scientific paper
Chondrule-like particles from Luna 16 and Luna 20 regolith samples have been investigated. On the basis of structure, there are three genetic types of chondroids. These types were formed as a result of: (1) spontaneous crystallization of completely molten drops from the supercooled state, characterized by intersertal, streaked, and sheaf-like structure; (2) devitrification of glass spherules; and (3) solidification of partly molten drops that contain regolith particles and have breccialike structure. In chemical and normative composition the chondroids of the first types correspond to highland rocks of the anorthosite-norite-troctolite series. Investigated chondroids are formed in the impact cloud during meteorite impact, and the type of chondroid depends on impact energy, the place of chondroid origin in the impact cloud, and the composition of the original material.
Ivanov Alexei V.
Nazarov Michael A.
Rode O. D.
Shevaleevskii I. D.
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