Chemical classification of iron meteorites. XI - Multi-element studies of 38 new irons and the high abundance of ungrouped irons from Antarctica

Details Chemical classification of iron meteorites. XI - Multi-element studies of 38 new irons and the high abundance of ungrouped irons from Antarctica Chemical classification of iron meteorites. XI - Multi-element studies of 38 new irons and the high abundance of ungrouped irons from Antarctica

Mar 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989gecoa..53..735w&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 53, March 1989, p. 735-744.

Computer Science

27

Abundance, Iron Meteorites, Meteoritic Composition, Antarctic Regions, Classifying, Germanium, Petrography, Silicates, Meteorites, Iron Meteorites, Chemistry, Classification, Abundance, Antarctic Meteorites, Concentration, Catalog, Pallasites, Structure, Yamato Meteorites, Samples, Meteorites, Laboratory Studies, Petrography, Alh Meteorites, Eet Meteorites, Ild Meteorites, Iab Irons, Iiicd Irons, Iiab Irons, Iid Irons, Iie Irons, Iiiab Irons, Iva Irons, Composition, Distribution, Parent Bodies, Meteoroids,

Scientific paper

Concentrations of 14 elements in the metal of 38 iron meteorites and a pallasite are reported. Three samples are paired with previously classified irons, raising the number of well-classified, independent iron meteorites to 598. Several of the new irons are from Antarctica. Of 24 independent irons from Antarctica, eight are ungrouped, a much higher fraction than that among all classified irons. The difference is probably related to the fact that the median mass of Antarctic irons is about two orders of magnitude smaller than that of non-Antarctic irons. Smaller meteoroids may tend to sample a larger number of asteroidal source regions, perhaps because small meteoroids tend to have higher ejection velocities or because they have random-walked a greater increment of orbital semimajor axis away from that of the parent body.

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