Comparisons of Antarctic and non-Antarctic achondrites and possible origin of the differences

Details Comparisons of Antarctic and non-Antarctic achondrites and possible origin of the differences Comparisons of Antarctic and non-Antarctic achondrites and possible origin of the differences

Jan 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991gecoa..55...35t&link_type=abstract

(Workshop on Differences between Antarctic and non-Antarctic Meteorites, Vienna, Austria, July 27, 28, 1989) Geochimica et Cosmo

Mathematics

Logic

11

Achondrites, Antarctic Regions, Meteoritic Composition, Petrology, Chemical Composition, Microstructure, Pyroxenes, Ureilites, Meteorites, Antarctic Meteorites, Achondrites, Comparisons, Medanitos, Yamato Meteorites, Mineralogy, Pairing, Yamato 74159, Eucrites, Texture, Chemistry, Diogenites, Ureilites, Hed Meteorites, Laboratory Studies, Stony Meteorites, Composition, Samples, Meteorite, Experiments, Magnesium, Photomicrographs, Catalog, Aubrites, Snc Meteorites, Parent Bodies, Origin, Classification, Yama

Scientific paper

Pairing information on Yamato chondrites was obtained using mineralogical techniques, and the results are used to discuss differences between Antarctic and non-Antarctic achondrites, their sources, and their relation to asteroids. It was found that the Antarctic HED (howardites, eucrites, diogenites) achondrites and ureilites differ from non-Antarctic specimens by the following two criteria: (1) polymict eucrites excluding those with howarditic affinity are not found in the non-Antarctic collections, and (2) magnesian ureilites and augite-bearing ureilites are found only in Antarctica. It is suggested that the Yamato diogenites may represent falls on restricted areas in the distant past.

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