Neon in Material Separates of the Allende and Orgueil Meteorites

Document Type

Conference Abstract

Publication Date

3-1990

Abstract

We have initiated a series of experiments on carbonaceous meteorites in the hope of achieving material separates through the use of the xnildest possible physical and chemical treatments. The first attempt to produce a physical separation of the carbon and noncarbon phases in the Allende meteorite was canied out by preparing seven sieve fractions from a~ , Allende fragment which had been disaggregated by ultrasonic treatment in distilled water, interrupting periodically for cycles of freeze-thawing. This hgment was discovered to contain the fht gas-rich matter known to occur in Allende and clearly indicated the presence of solar neon. Magnetic and nonmagnetic separates were prepared from the remaining miterial of the two most gas-rich sieve fi-actions, and these were analyzed by stepwise heating along with unaltered samples in an effort to isolate the solar neon and the gas-rich matter. In this experiment we attempted to achieve useN material separates by partitioning disaggregated material from the Allende and Orgueil meteorites between isoamyl alcohol and water.

Department

Physics and Astronomy

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