SIMS measurement of magnesium isotopic ratios in Yamato-74191 and -75028 meteorites

Details SIMS measurement of magnesium isotopic ratios in Yamato-74191 and -75028 meteorites SIMS measurement of magnesium isotopic ratios in Yamato-74191 and -75028 meteorites

Dec 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982polre..25..171n&link_type=abstract

(Symposium on Antarctic Meteorites, 7th, Tokyo, Japan, Feb. 19, 20, 1982) National Institute of Polar Research, Memoirs, Special

Physics

Meteorites, Antarctic Meteorites, Sims, Magnesium, Isotopic Ratios, Yamato Meteorites, Yamato 74191, Yamato 75028

Scientific paper

Isotopic ratios of Mg-24/Mg-25 and Mg-26/Mg-25 have been measured for Mg-rich and Al-poor portions of matrix parts of the Yamato-74191 and -75028 meteorites with an ion microprobe mass analyzer. Several terrestrial samples of lherzolites and a dunite were also analyzed. Clear evidence for the excess of Mg-24 has been found in portions of Yamato-74191, where Mg/Si ratio is higher than 1.5 and Al/Mg ratio is less than 0.13. This excess Mg-24 may be evidence for the heterogeneity of the primordial solar nebula.

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