Nitrogen isotopes in chondrules: signatures of precursors and formation processes

摘要: Nitrogen isotope abundance of 68 individual chondrules separated from six ordinary, two carbonaceous and enstatite chondrites has been analysed. N composition ordinary generally shows large variation differs that their host. This range suggests the presence different components in precursors. Chondrules on other hand show isotopic similar to host, suggesting precursors with for both host meteorites. systematics therefore distinguishes those chondrites. require are parent meteorites formation nebular environment, whereas formed same as presumably region.