The nomenclature of polymict basaltic achondrites

Details The nomenclature of polymict basaltic achondrites The nomenclature of polymict basaltic achondrites

Jun 1983

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983metic..18..103d&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 18, June 30, 1983, p. 103-111.

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42

Achondrites, Basalt, Meteoritic Composition, Breccia, Classifications, Mineralogy, Nomenclatures, Pyroxenes, Meteorites, Achondrites, Nomenclature, Classification, Lithology, Comparisons, Eucrites, Diogenites, Brecciation, Petrology, Composition, Basalt, Howardites, Magnesium, Orthopyroxene, Mineralogy, Structure

Scientific paper

The system of nomenclature for basaltic achondrite meteorites is discussed, and new classification criteria are proposed. Under the new system, all achondrites are divided intno the broad groupings 'monomict' and 'polymict' by the number of lithologies present. The monomicts are classified structurally as brecciated or unbreccciated and as eucrites, diogenites, or cumulate eucrites. The polymicts are classified using an arbitrary mineral-chemical standard based on the percentage content of diogenite (magnesium orthopyroxenite): diogenites have more than 90 percent, eucrites have less than 10 percent, and all other polymicts area howardites. Tables listing all known achondrites by classification are provided.

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