Computer Science
Scientific paper
Apr 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991gecoa..55..935h&link_type=abstract
Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 55, April 1991, p. 935-942.
Computer Science
20
Chondrule, Melting, Sodium, Solvent Retention, Chemical Composition, Temperature Effects, Meteorites, Sodium, Chondrules, Melting, Uocs, C Chondrites, Heating, Stony Meteorites, Ordinary Chondrites, Enrichment, Refractory Material, Depletion, Volatiles, Concentration, Major Elements, Minor Elements, Lithophiles, Composition, Mineralogy, Temperature, Matrix, Reduction, Metamorphism, Cv3 Chondrites, Ll3 Chondrites, Oxidation, Formation, Origin, Parent Material, Albite, Efremovka, Semarkona
Scientific paper
Using published data, the differences in Na concentrations in different groups of porphyritic olivine chondrules are analyzed. The results show that Na was incorporated into type II chondrule precursors as albite and was not significantly lost during melting. Type I chondrules, which contain very low concentrations of Na, were also not depleted in Na during melting, as indicated by the lack of correlation between the Na/Al ratios and the liquidus temperatures in type I chondrules. It is concluded that the difference in Na concentration is caused by the abundance of precursor albite in type II chondrules, rather than the loss of Na from the melt.
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