SIMS Analysis of OH and D/H of Apatites from Eucrites

Abstract

Eucrites, a member of the howardite-eucritediogenite (HED) group, are basaltic meteorites that are believed to come from the asteroid Vesta [e.g., 1]. A recent study of water concentration and hydrogen isotope of eucrite apatite [2] suggested an early accretion of water from a carbonaceous chondrite– like source on Earth, Vesta and other planetary bodies in the inner solar system. In this study, we present results of OH and D/H analyses of apatites from more eucrite samples.

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