Origin of iron meteorite groups IAB and IIICD

Details Origin of iron meteorite groups IAB and IIICD Origin of iron meteorite groups IAB and IIICD

Aug 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980znata..35..781w&link_type=abstract

Zeitschrift für Naturforschung, Teil a, vol. 35 a, Aug. 1980, p. 781-795.

Computer Science

20

C1 Chondrites, Comparisons, Stratigraphy, Ages, Sulfur, Inclusions, Siderophile Elements, Isotopes, Carbon, Oxygen, Sphalerite, Data, Iron Sulfide, Models, Meteorites, Iron Meteorites, Origin, Nickel, Classification, Concentrations, Iridium, Gallium, Germanium, Melts, Tungsten, Arsenic, Fractionation, Formation, Parent Bodies, Impacts, Temperatures, Equilibration, Crystallization, Cooling, Trapping, Catalogs, Shock, Abundance

Scientific paper

Several low Ni-iron meteorites previously classified with group IAB are reclassified with group IIICD because of lower Ge, Ga, W, and Ir concentrations and higher As concentrations. The low Ni extreme of IIICD is now 62 mg/g, and that of IAB is 64 mg/g. It is proposed that the meteorites of both groups formed as individual shock melts on a chondritic parent body. The differences in log element-log Ni slopes of the daughter irons demonstrate that there were detailed differences in the composition and size of phases in the parental material (e.g., more Ni in the sulfides or metal of IAB, or more Ge and Ir in the oxides of IIICD).

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