Petrographic studies of refractory inclusions from the Murchison meteorite

Details Petrographic studies of refractory inclusions from the Murchison meteorite Petrographic studies of refractory inclusions from the Murchison meteorite

Nov 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984lpsc...15..299m&link_type=abstract

(Lunar and Planetary Institute, NASA, American Geophysical Union, et al., Lunar and Planetary Science Conference, 15th, Houston,

Physics

6

Chemical Composition, Inclusions, Meteoritic Composition, Mineralogy, Petrography, Refractory Materials, Electron Microscopy, Evolution (Development), Neutron Activation Analysis, Planetary Nebulae, Meteorites, Petrography, Refractory Materials, Inclusions, Murchison, Samples, Meteorite, Mineralogy, Cm2 Chondrites, Description, Models, Composition, Hibonite, Formation, Condensation, Melting, Hypotheses, Texture, Spinel, Spherules, Parent Bodies, Comparisons

Scientific paper

Textural and mineral-chemical data on freeze-thaw disaggregated refractory inclusions from the Murchison meteorite are reported. The data were obtained with neutron activation analysis, SEM, and spectroscopy, the study revealed corundum-bearing inclusions, spinel-hibonite aggregates and spherules, and spinel-pyroxene and elivine-pyroxene inclusions. One of the three spinel-, pyroxene-, forsterite-rich inclusions had an amoeba-shaped spinel-pyroxene core, implying vapor-to-solid condensation and therefore crystallization from a melt. It is concluded that the meteorite formation encompassed diverse nebular materials, and that further studies of the meteorite will enhance the data base on the planetary nebular processes.

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