The Allende meteorite: Information from Ca-Al-rich inclusions on the formation and early evolution of the solar system

Details The Allende meteorite: Information from Ca-Al-rich inclusions on the formation and early evolution of the solar system The Allende meteorite: Information from Ca-Al-rich inclusions on the formation and early evolution of the solar system

Sep 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984phdt.........4w&link_type=abstract

Ph.D. Thesis Melbourne Univ., Carlton (Australia).

Mathematics

Logic

4

Allende Meteorite, Chemical Composition, Cosmology, Solar System, Aluminum, Calcium, Evolution (Development), Nebulae, Sulfides

Scientific paper

Chemical and petrological investigations of the Allende CV carbonaceous chondrite meteorite show that the different types of Ca-Al-rich inclusions (CAI's) in Allende formed variously as molten or semimolten evaporative residues, as solid condensates, as liquid condensates, as fine grained condensates, and from melted fine grain aggregates. Once formed, many of these materials grew further by capture, aggregation and overgrowth. The mass dependent isotopic fractionation in the isotopically anomalous FUN CAI's was probably produced by the slow volatilization of excessive amounts of silicate dust in the primordial solar nebula; the volatization could simultaneously also have created the oxidizing conditions that gave rise to the characteristic chemical signatures of FUN CAI's. FUN CAI's appear to be either oxidized evaporative residues enriched in refractory elements and heavy isotopes, or the complementary refractory depleted, heavy isotope depleted condensates. Various lines of evidence indicate that all the components of Attende formed within a relatively circumscribed region of the solar nebula.

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