Nitrogen isotopic signatures from the metal phase of IIE and IVA iron meteorites

Details Nitrogen isotopic signatures from the metal phase of IIE and IVA iron meteorites Nitrogen isotopic signatures from the metal phase of IIE and IVA iron meteorites

Mar 1997

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1997lpi....28.1057p&link_type=abstract

Conference Paper, 28th Annual Lunar and Planetary Science Conference, p. 057.

Computer Science

Iron Meteorites, Nitrogen Isotopes, Meteoritic Composition, Pyrolysis, Group 4A Compounds, Metal Compounds, Oxygen Isotopes, Carbon Dioxide, Spectral Signatures

Scientific paper

Oxygen isotopic compositions have been used to delineate possible genetic relationships between various meteorite groups. Clayton et al. (1983) 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. Our stepwise heating results represent the first such data from these iron meteorite classes, although bulk measurements in a number of iron meteorites have been reported. The high temperature isotopic signatures are well defined, but small spallation components can be identified. Interestingly, indigenous N components of IIE and IVA irons appear remarkably similar.

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