Other
Scientific paper
Aug 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16..775k&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 16, Aug. 1989, p. 775-778.
Other
5
Allende Meteorite, Carbonaceous Chondrites, Inclusions, Meteoritic Composition, Spinel, Aluminum Compounds, Perovskites, Solar System, Titanium Compounds, Meteorites, Allende, Inclusions, Samples, Meteorite, Relict Material, Laboratory Studies, Fassaite, Fractionation, Rare Earth Elements, Grains, Enrichment, Refractory Material, Lithophiles, Procedure, Petrography, Major Elements, Mineralogy, Chemistry, Description, Parent Material
Scientific paper
Fassaite rims around spinel grains that are enclosed entirely by normally zoned cores of melilite crystals are interpreted as relict grains which predate the melting of Allende type B1 refractory inclusions. Nonrelict subliquidus fassaite did not begin crystallizing from melts of these compositions until the onset of precipitation of the reversely zoned melilite mantles around the same melilite crystal cores. Relict fassaite is fractionated and highly enriched in REE and other refractory lithophiles compared to subliquidus fassaite in the same inclusion. Mass balance suggests that the relict fassaite represents only 3 percent of the original premelt amount of fassaite, and that melilite and at least one other phase were additional condensate precursors of these inclusions.
Davis Aileen M.
Grossman Lawrence
Kuchner S. M.
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