Chemical classification of iron meteorites. IX - A new group /IIF/, revision of IAB and IIICD, and data on 57 additional irons

Details Chemical classification of iron meteorites. IX - A new group /IIF/, revision of IAB and IIICD, and data on 57 additional irons Chemical classification of iron meteorites. IX - A new group /IIF/, revision of IAB and IIICD, and data on 57 additional irons

Jun 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980gecoa..44..773k&link_type=abstract

Geochimica et Cosmochimica Acta, vol. 44, June 1980, p. 773-787.

Physics

Geophysics

30

Chemical Composition, Classifications, Iron Meteorites, Meteoritic Composition, Chondrites, Gallium, Germanium, Iridium, Meteoritic Microstructures, Neutron Activation Analysis, Nickel, Meteorites, Iron Meteorites, Classification, Chemistry, Composition, Structure, Observations, Concentrations, Nickel, Gallium, Iridium, Germanium, Inaa, Rnaa, Techniques, Element Ratios, Experiments, Germanium/Gallium, Catalogs, Data, Cooling, Pallasites, Origin, Fractionation, Oxidation, Parent Bodies, Geochemistry, Cores,

Scientific paper

The paper discusses the chemical classification of independent iron meteorites which include 57 meteorites based on structural observations and concentrations of Ni, Ga, Ge, and Ir. Instrumental neutron activation analysis indicates that five previously studied irons with very high Ge/Ga ratios are compositionally closely related and can be gathered together as group IIF; a previously unstudied iron, Dehesa, has the highest Ge/Ga ratios known in an iron meteorite, a ratio 18 times higher than that in CI chondrites. In terms of Ge/Ga ratios and other properties, group IIF shows genetic links to the Eagle station pallasites and CO/CV chondrites. The iron with the highest Ni concentration, Oktibbeha County, is a member of group IAB, and it extends the concentration ranges of all elements in this nonmagnetic group.

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