Evidence for successive episodes of condensation at high temperature in a part of the solar nebula

Details Evidence for successive episodes of condensation at high temperature in a part of the solar nebula Evidence for successive episodes of condensation at high temperature in a part of the solar nebula

Mar 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986e%26psl..77..129w&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 77, no. 2, March 1986, p. 129-148. Research supported by the Australi

Mathematics

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11

Allende Meteorite, Inclusions, Meteoritic Composition, Solar Corona, Aluminum, Calcium, Cores, Crusts, Microstructure, Meteorites, Condensation, Temperature, Solar Nebula, Cais, Inclusions, Allende, Cv3 Chondrites, Stony Meteorites, Samples, Meteorite, Mantle, Core, Crust, Description, Structure, Layers, Formation, Compositon, Mineralogy, Chemistry, Texture, Trace Elements, Cooling, Comparisons, Experiments, Laboratory Studies, Electron Microscopy, Sem

Scientific paper

A polished thin section of a Ca-Al-rich inclusion CAI 3643 from the Allende meteorite has been studied by means of light and scanning electron microscopes, and electron and proton microprobes. The appearance and the mineral composition of the inclusion's three concentric layers: core, mantle, and crust are described. Despite differences in texture and composition, the three layers display a continuity in their modal mineralogical compositions, their extreme Al2O3 enrichments (53-69 percent, compared to 25-45 percent in other CAIs), and their trace element complementarity. This implies that all the layers of CAI 3643 have formed from the same cooling gaseous reservoir within a limited interval of time and space, consistent with an origin in a local transient heating event in the CV chondrite formation region of the nebula.

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