Physics
Scientific paper
Nov 1981
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981e%26psl..55..363t&link_type=abstract
Earth and Planetary Science Letters, vol. 55, no. 3, Nov. 1981, p. 363-369.
Physics
13
Carbonaceous Chondrites, Meteoritic Composition, Nitrogen Isotopes, Rare Gases, Solar Wind, Chemical Analysis, Planetary Evolution, Pyrolysis, Solar System, Orgueil Meteorite, Murray Meteorite, Mighei Meteorite, Renazzo Meteorite, Grosnaja Meteorite, Karoonda Meteorite, Meteorites, Allende Meteorite, Nitrogen, Isotopes, Experiments, Heating, Xenon, Neon, Temperatures, Origin, Abundance, Rare Gases, Data, Carbonaceous Chondrites, Carbon, C Chondrites, Composition, Fractionation, Solar Wind, Condensation
Scientific paper
Nitrogen in the Allende meteorite consists of at least two components, partially resolvable in a stepwise heating experiment. L-nitrogen, released below 1000 C, has a low delta N-15 (-60 to -90 per mil), and is associated with neon-A and CCF-xenon and may reside in a carbonaceous carrier. H-nitrogen, released above 1000 C, is associated with normal xenon, and may reside in silicate minerals. It is very difficult to account for the entire range of N-15/N-14 ratios in solar system materials by mass-dependent chemical and physical processes alone. In particular, an N-14 enriched component of nuclear origin appears necessary to account for the L-nitrogen in Allende.
Clayton Robert N.
Thiemens Mark H.
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