Mathematics – Logic
Scientific paper
Mar 1985
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1985metic..20...79b&link_type=abstract
Meteoritics (ISSN 0026-1114), vol. 20, March 31, 1985, p. 79-87.
Mathematics
Logic
Chondrites, Meteoritic Composition, Mineralogy, Petrology, Chemical Analysis, Chondrule, Olivine, Pyroxenes, Meteorites, Chondrites, Mineralogy, Petrology, Chemistry, Messina, L5 Chondrite, Stony Meteorites, Mineralogy, Composition, Opacity, Phases, Description, Chondrules, Matrix, Crystals, Amorphous Material, Features, Silicate, Grains, Deformation, Glass, Inclusions, Structure, Samples, Meteorite, Microscope Methods
Scientific paper
The meteorite which fell near Messina, Italy, on July 16, 1955 is a typical olivine-hypersthene (L-group) chondrite. Its mineralogical composition is: olivine (Fa24), orthopyroxene (Fs20) with some polysynthetically twinned clynopyroxene, plagioclase (An10) and merrillite. Opaque phases present are: copper, kamacite, taenite, plessite, chalcopyrrhotite, mackinawite, troilite and chromite. The stone contains abundant chondrules. The matrix consists chiefly of broken chondrules with tiny fragments of crystals and rare amorphous material. Chondrules form more than 42 percent of the meteorite by volume. Some unusual features of the fabric of this meteorite include silicate grains showing deformation: silicates with fusion spots of dark glass containing blebs of metallic iron; iron and troilite with marginal fusion yielding globules and droplets sometimes showing flow structures. The classification of this chondrite is confirmed by bulk chemical analysis.
Baldanza B.
Triscari M.
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