Carbon in the Metal of Iron Meteorites

Details Carbon in the Metal of Iron Meteorites Carbon in the Metal of Iron Meteorites

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27...63b&link_type=abstract

Lunar and Planetary Science, volume 27, page 63

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Carbon, Diffusion, Metal, Meteorites: Iron, Partitioning

Scientific paper

Magmatic iron meteorites (e.g., group IIIAB) are believed to represent the slowly cooled cores of asteroidal-sized bodies. Concentration gradients of Ni in taenite (gamma-alloy) adjacent to kamacite (alpha-alloy) have been studied extensively following the early work of Wood and Goldstein and Ogilvie, and can be used to constrain the rate at which the meteorite cooled through -700 degrees-400 degrees C. Studies on non-anomalous irons have also shown zoning profiles in C, Co, Cu, Zn, Ga, and Ge. Zoning patterns of elements other than Ni can provide independent constraints on the thermal histories of iron meteorites at lower temperatures, provided as in the case of C, N and P, that the elements diffuse significantly faster than Ni. We report here ion microprobe measurements of the distribution

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