Computer Science
Scientific paper
Mar 1996
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996lpi....27.1501z&link_type=abstract
Lunar and Planetary Science, volume 27, page 1501
Computer Science
4
Composition: Isotopic, Meteorites: Iron, Nitrogen
Scientific paper
Nitrogen isotopic compositions of iron meteorites were studied by several authors to address the question of the origin of iron meteorites and their genetic relationships. It was concluded that parent body processes have only a slight effect on the primary signatures. All these results are only based on the N composition of the matrix metal. No systematic study has been performed to determine effects of parent body processes on the N isotopes in the presence of silicate inclusions. Nitrogen signatures, reflecting isotopic disequilibrium, were previously observed in Acapulco. We report first results of a detailed study of the N isotopic composition in silicate and metal phases of the IAB iron El Taco. Metal and graphite separates were analyzed by stepwise pyrolysis followed by several combustion steps using a static mass spectrometer. The new data reveal a large scale disequilibrium among the investigated phases.
Marti Kurt
Mathew K. J.
Zipfel Jutta
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