Size-distributions of chondrule types in the Inman and Allan Hills A77011 L3 chondrites

Details Size-distributions of chondrule types in the Inman and Allan Hills A77011 L3 chondrites Size-distributions of chondrule types in the Inman and Allan Hills A77011 L3 chondrites

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984metic..19..135r&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 19, Sept. 30, 1984, p. 135-143.

Computer Science

27

Chondrites, Chondrule, Meteoritic Microstructures, Size Distribution, Olivine, Pyroxenes, Solar Corona, Statistical Tests, Meteorites, Size, Distribution, Chondrules, Inman, L3 Chondrites, Dust, Allan Hills Meteorites, Antarctic Meteorites, Petrography, Texture, Size, Comparisons, Olivine, Pyroxene, Collisions, Formation, Aerodynamics, Particles, Gases, Interactions, Zones, Melting, Composition, Samples, Meteorite

Scientific paper

The size distributions of barred-olivine (BO) and radial-pyroxene/cryptocrystalline (RPC) chondrules are investigated in a petrographic study of nine and 18 thin sections (respectively) of the L3 chondrites Inman and ALHA77011. It is found that the Inman chondrules are significantly larger than the ALHA77011 chondrules and that RPC chondrules in Inman and BO chondrules in ALHA77011 are relatively more numerous, but no significant difference in the BO and RPC size distributions is observed. A formation mechanism involving size sorting of dustball chondrule precursors by aerodynamic particle-gas interactions in a large region of the solar nebula, melting of sorted dustballs in relatively small regions, and chondrule mixing and agglomeration (from subreservoirs containing uniformly large or uniformly small chondrules of a particular compositional type) to form chondrites is proposed.

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