Petrographic studies of refractory inclusions from the Murchison meteorite

Conference · Thu Nov 15 00:00:00 EST 1984 · JGR, J. Geophys. Res., (Sect.) C:; (United States)

OSTI ID:5703095

Macpherson, G J; Grossman, L; Hashimoto, A; Bar-Matthews, M

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.

• Research Organization: Smithsonian Institution, Washington, DC
• OSTI ID: 5703095
• Report Number(s): CONF-840385-
• Journal Information: JGR, J. Geophys. Res., (Sect.) C:; (United States), Vol. 89; Conference: 15. lunar and planetary science conference, Houston, TX, USA, 12 Mar 1984
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
CHONDRITES
INCLUSIONS
PETROGRAPHY
ABUNDANCE
ACTIVATION ANALYSIS
ELECTRON MICROSCOPY
MINERALOGY
NEUTRON REACTIONS
ORIGIN
PLANETARY NEBULAE
BARYON REACTIONS
CHEMICAL ANALYSIS
HADRON REACTIONS
METEORITES
MICROSCOPY
NEBULAE
NUCLEAR REACTIONS
NUCLEON REACTIONS
STONE METEORITES
640107* - Astrophysics & Cosmology- Planetary Phenomena