ACFER 094, a uniquely primitive carbonaceous chondrite from the Sahara

Details ACFER 094, a uniquely primitive carbonaceous chondrite from the Sahara ACFER 094, a uniquely primitive carbonaceous chondrite from the Sahara

Jan 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995metic..30...47n&link_type=abstract

Meteoritics (ISSN 0026-1114), vol. 30, no. 1, p. 47-56

Mathematics

Logic

40

Carbon, Carbonaceous Chondrites, Mass Ratios, Meteoritic Diamonds, Nitrogen, Silicon Carbides, Mineralogy, Oxygen Isotopes, Petrology, Sahara Desert (Africa)

Scientific paper

The Saharan meteorite Acfer 094 is a unique type of carbonaceous chondrite. Mineralogical and petrological considerations and O isotopes are unable to distinguish unambiguously between a CO3 vs. CM2 classification. The other important light elements, C and N, have systematics that do not match any previously recognized meteorite group. Particularly important in this respect is the very low C/N ratio and delta C-13 of the macromolecular C. Acfer 094 has more diamond and SiC, especially X type grains, than any other specimen studied, suggesting minimal thermal or aqueous processing to decrease its very primitive status.

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