Nitrogen Isotopic Signatures from the Metal Phase of IIE and IVA Iron Meteorites

Oxygen isotopic compositions have been used to delineate possible genetic relationships between various meteorite groups. Clayton et al. first noted similarities in O isotopic signatures between silicates in IIE irons and H chondrites, and between IVA irons and L and/or LL chondrites and suggested a possible common parent body in each case. However, since silicate inclusions represent a minor phase in IIE and especially IVA irons, we examined N isotopic signatures from the metal phase of these meteorites for comparison to N isotopic signatures in H and L/LL chondrites, respectively.