Chemical compositions of siderophile element-rich opaque assemblages in an Allende inclusion

Details Chemical compositions of siderophile element-rich opaque assemblages in an Allende inclusion Chemical compositions of siderophile element-rich opaque assemblages in an Allende inclusion

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990gecoa..54.3491s&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 54, Dec. 1990, p. 3491-3508. Research supported by the University of Chic

Computer Science

14

Allende Meteorite, Carbonaceous Chondrites, Chemical Composition, Inclusions, Meteoritic Composition, Solar Corona, Crystal Structure, Melts (Crystal Growth), Thermodynamics

Scientific paper

Chemical compositions of ten opaque assemblages, or Fremdlinge, from an Allende Type B Ca-,Al-rich coarse-grained inclusion were determined. Attempts to model the abundances of refractory siderophiles assuming condensation from the solar nebula into a single phase failed to match the observed combination of subchondritic Re/Os and Ir/Pt ratios. However, virtually all refractory siderophile fractionations in these Fremdlinge could be matched by a different model, in which all metals condensed into three separate alloys according to their crystal structures.

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