The absence of nickel isotopic anomaly in iron meteorite metal and sulfide

Abstract

Evidence for ^(60)Fe (τ^(1/2) = 1.5 Ma) has been reported in eucrites and chondrites [1-4], consisting of excesses in ^(60)Ni, in phases with high Fe/Ni. Recent work on iron meteorites, using MC-ICP-MS, indicates a complex picture. Quitté et al. [5] analyzed FeNi and sulfide from iron meteorites and found no ^(60)Ni effects in the FeNi at ±0.3 єu. However, in some sulfides, they found large and correlated effects in є^(60)Ni and є^(61)Ni. In irons, Bizzarro et al. [6] claimed small shifts in ^(60)Ni and ^(62)Ni. Cook et al. [7] showed shifts of -0.5 єu in ^(60)Ni in several sulfides and up to -2.4 єu in Mundrabilla sulfide.

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