First occurrence of pyrophanite (MnTiO3) and baddeleyite (ZrO2) in an ordinary chondrite

Details First occurrence of pyrophanite (MnTiO3) and baddeleyite (ZrO2) in an ordinary chondrite First occurrence of pyrophanite (MnTiO3) and baddeleyite (ZrO2) in an ordinary chondrite

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993metic..28..232k&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 28, no. 2, p. 232-239.

Computer Science

3

Chondrites, Ilmenite, Manganese Oxides, Meteoritic Composition, Titanates, Zirconium Oxides, Aluminum Oxides, Impact Melts, Magnesium Oxides, Metamorphic Rocks, Olivine, Petrography, Zinc Oxides, Meteorites, Stony Meteorites, Chondrites, Ordinary Chondrites, Nebula, Pyrophanite, Baddeleyite, Composition, Samples, Meteorite, Chondrules, Laboratory Studies, Raguli, H3 Chondrites, Description, Parent Bodies, Origin, Formation, Hypotheses, Parent Material, Procedure, Petrography, Microprobe Methods, Mineralogy,

Scientific paper

An examination is conducted of the distinct optical and compositional zoning exhibited by a Mg-Al-chromite fragment in the Raguli H3.8 ordinary chondrite. Two end-member pyrophanite grains occur in the fragment's outer portion; this is noted to be the first occurrence of pyrophanite in conjunction with baddeleyite in an ordinary chondrite. Two alternative models are presented for the formation of the fragment: a multistage nebular melting process, and the fragment's formation on a metamorphosed parent body. The latter alternative is favored.

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