Stable Ni isotopes and Be-10 and Al-26 in metallic spheroids from Meteor Crater, Arizona

Details Stable Ni isotopes and Be-10 and Al-26 in metallic spheroids from Meteor Crater, Arizona Stable Ni isotopes and Be-10 and Al-26 in metallic spheroids from Meteor Crater, Arizona

Mar 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993lpi....24.1547x&link_type=abstract

In Lunar and Planetary Inst., Twenty-Fourth Lunar and Planetary Science Conference. Part 3: N-Z p 1547-1548 (SEE N94-20636 05-91

Computer Science

Aluminum 26, Beryllium 10, Chemical Composition, Ejecta, Fractionation, Nickel, Nickel Isotopes, Spheroids, Vaporizing, Chemical Analysis, Evaporation, Iron, Meteorite Craters, Meteoritic Composition, Oxidation

Scientific paper

The Canyon Diablo spheroids, which are found around Meteor Crater, Arizona, are nickel-enriched objects with diameters from less than 0.1 to several mm. Previous studies have suggested that the enrichment of nickel resulted either from shock-melting of S-rich areas followed by solidification of the liquids under strongly non-equilibrium conditions at rapid cooling rates during flight outward from the crater or from the selective oxidation of iron. Isotopic studies are an effective tool for constraining the degree of open-system evaporation experienced by a system. The purpose of this study was to see whether Ni isotopes had been fractionated by volatilization during spheroid formation. In addition, the cosmogenic nuclides Be-10 and Al-26 were measured to try to estimate the depths in the parent meteorite from which the spheroids came.

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