Other
Scientific paper
Oct 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989znata..44.1015j&link_type=abstract
Z. Naturforsch., A, Vol. 44a, No. 10, p. 1015 - 1027
Other
Meteorites: Inclusions, Meteorites: Thermal History, Meteorites: Mineralogy
Scientific paper
Ru, Os, and Ir in Allende whole rock and coarse grained CAIs are present in amounts up to 80% in phases other than inert Pt-metal alloys. Selective chemical dissolution was used to dissolve sulfides by ascorbic acid H2O2 and metal (NiFe)-silicate-oxides by HF/HCl. Carbon-rich, spinel-chromite residues were left from the demineralization procedures and scavenged inert material such as Pt-metal alloy particles. The Pt-metal contents in sulfide phases from the Allende whole rock sample and the total Pt-metal contents of the CAI samples give near-cosmic to cosmic interelement ratios. Chemical alteration processes in condensed material may have required moderate to high temperatures in the nebula to have caused the interelement relationships observed. The authors determined the final equilibration temperatures to which components of Allende were subjected.
Jovanovic Stanka
Reed George W. Jr.
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