Olivine in howardites - The source, and implications for the parent bodies of achondrites

Details Olivine in howardites - The source, and implications for the parent bodies of achondrites Olivine in howardites - The source, and implications for the parent bodies of achondrites

Apr 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982gecoa..46..667d&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 46, Apr. 1982, p. 667-680. In French.

Computer Science

7

Achondrites, Meteoritic Composition, Olivine, Electron Microscopy, Fayalite, Iron Meteorites, K Lines, Magma, Magnesium, Mass Spectrometers, Recrystallization, Silicates, Meteorites, Olivine, Howardites, Parent Bodies, Achondrites, Analysis, Electron Microprobe, Grains, Composition, Distribution, Abundance, Data, Fragmentation, Crystallization, Magmas, Formation, Source, Chemistry, Comparisons, Differentiation, Models, Procedure, Catalogs, Mineralogy, Origin, Concentrations, Eucrites, Diogenites, Antarctic

Scientific paper

The olivine contents of 12 howardite samples were examined by means of an electronic microprobe and a spectrometer for simultaneous detection of Si K-alpha, Fe K-alpha, and Ca K-alpha. The distributions of 300 olivine grains were examined and were found to have an Fe to Fe plus Mg ratio distributed along a continuity between 8 and 90, with peaks at 13 and 30. The tail of the fayalite concentration distribution corresponded with several of the clusters of olivine-rich grains. Evidence was discovered in terms of FeO/MnO ratios which indicate formation from magmas. The presence of similar olivine concentrations and distributions in many howardites denotes a common parent body.

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