HED Petrogenesis: Are Orthopyroxenitic Magmas Plausible?

Details HED Petrogenesis: Are Orthopyroxenitic Magmas Plausible? HED Petrogenesis: Are Orthopyroxenitic Magmas Plausible?

Jan 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996eiaf.conf...34w&link_type=abstract

Workshop on Evolution of Igneous Asteroids: Focus on Vesta and the HED Meterorites, p. 34

Computer Science

Achondrites, Asteroids, Basalt, Magma, Meteoritic Composition, Petrogenesis, Vesta Asteroid, Spectroscopy, Magnesium Oxides, Iron Oxides

Scientific paper

The acronym HED (for Howardite, Eucrites, and Diogenites) is appropriate because an abundance of evidence indicates that howardites, eucrites, and diogenites formed on a single parent asteroid. Howardites are clearly mixtures of eucrites and diogenites, with very little else. Eucrites are basalts and compositionally basaltic (gabbroic) cumulates. Diogenites are orthopyroxenites, and are also widely assumed to be igneous cumulates. A popular although unproven hypothesis is that asteroid 4 Vesta is the HED source, based on spectroscopic detection of a number of apparently howarditic, eucritic, and diogenitic smaller asteroids in the vicinity of Vesta and the 3:1 resonance. The relationship between diogenites and eucrites is still highly controversial.

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