ACFER 182 - Search for the location of N-15-enriched nitrogen in an unusual chondrite

Details ACFER 182 - Search for the location of N-15-enriched nitrogen in an unusual chondrite ACFER 182 - Search for the location of N-15-enriched nitrogen in an unusual chondrite

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993e%26psl.116..165g&link_type=abstract

Earth and Planetary Science Letters (ISSN 0012-821X), vol. 116, no. 1-4, p. 165-180.

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23

Chondrites, Geochemistry, Meteoritic Composition, Nitrogen Isotopes, Carbonates, Chemical Analysis, Petrology, Meteorites, Acfer 182, Saharan Meteorites, Stony Meteorites, Chondrites, Nitrogen 15, Isotopes, Enrichment, Composition, Laboratory Studies, Samples, Meteorite, Abundance, Origin, Procedure, Geochemistry, Carbon, Formation, Mineralogy, Carbonates, Electron Microscopy, Comparisons, Hydrogen, Residue, Carriers, Petrology, Antarctic Meteorites, Weathering, Alh Meteorites, Alh 85085

Scientific paper

The nitrogen stable isotope geochemistry of Acfer 182, an unusual chondrite recovered from the western Sahara in November 1990, is studied along with the carbon and oxygen isotopic composition of Acfer 182 carbonates, and other properties. It is shown that, on the basis of mineralogy, petrology, and nitrogen stable isotope geochemistry, Acfer 182 is closely related to the ALH 85085 chondrite. The N-15 enriched nitrogen in almost all constituents of Acfer 182 is interpreted as emanating from a single source (i.e., interstellar grains which were incorporated within the Acfer 182 parent body during aggregation). Primary incorporation was followed by redistribution of N-15-enriched nitrogen throughout the parent, due to vaporization, condensation, and mixing of components, with nitrogen either trapped or implanted into silicates and metal.

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