Mathematics – Logic
Scientific paper
Mar 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993metic..28...14w&link_type=abstract
Meteoritics (ISSN 0026-1114), vol. 28, no. 1, p. 14-28.
Mathematics
Logic
30
Chondrule, Crystal Growth, Interstellar Chemistry, Meteoritic Composition, Meteoritic Microstructures, Chondrites, Melting, Nebulae, Textures, Meteorites, Stony Meteorites, Chondrites, Origin, Formation, Heating, Composition, Melting, Texture, Petrology, Chemistry, Oxygen, Isotopes, Cooling, Relict Material, Crystals, Size, Chondritic Material, Dust, Volatiles, Iron Oxide, Magnesium Oxide, Compound Chondrules, Lightning, Thermal Effects, Partial Melting, Temperature, Nebula
Scientific paper
Textures and composition variations were studied in a group of compound chondrules and constraints on chondrule formation were derived from the results obtained. Common chondrule textures and petrological-chemical studies of separated chondrules are discussed. Relic grains and cooling rates are considered and observations of compound chondrules are described. Results indicate that the size range of chondrules is limited and that while chondrules show well resolved differences in chemical and isotopic composition, almost all contain relict grains. Chondrule composition is distinct from igneous rock and volatile phases are common in their interiors. It is suggested that chondrules are formed by turbulence generated lightning at the interface between the dusty midplane and the gas-rich portion of the nebula.
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