Mathematics – Logic
Scientific paper
Mar 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...338l..37p&link_type=abstract
Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 338, March 1, 1989, p. L37-L40.
Mathematics
Logic
12
Abundance, Carbonaceous Meteorites, Isotopic Enrichment, Meteoritic Composition, Nuclear Fusion, Anomalies, Calcium Isotopes, Chromium Isotopes, Inclusions, Magnesium Isotopes, Titanium Isotopes, Meteorites, Inclusions, Isotopes, Anomalies, Cais, Fractionation, Abundance, Nucleosynthesis, Magnesium, Calcium, Chromium, Titanium, Fun, Samples, Meteorite, Allende, Chemistry, Mineralogy
Scientific paper
Ca-Al refractory inclusions with characteristic chemical and mineralogical compositions show an enhanced occurrence of 20 pct of isotope anomalies reflecting unknown nucleosynthetic effects for O and Mg. The anomalies are characterized by large isotope fractionation in Mg, apparent deficits in Mg-26/Mg-24, and large correlated effects for isotopes of Ca, Ti, and Cr. These isotope patterns define exotic components depleted in the most neutron-rich isotopes of Ca, Ti, and Cr, or components depleted in isotopes produced in explosive O and Si burning. An opaque assemblage within one of the inclusions yields isotope anomalies in Cr similar to the bulk inclusion and must be intrinsically part of the inclusion and not a trapped, foreign grain aggregate.
Brigham Cheryl A.
Papanastassiou Dimitri Anastassios
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