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Acfer 094, a uniquely primitive carbonaceous chondrite from the Sahara
Author(s) -
Newton J.,
Bischoff A.,
Arden J. W.,
Franchi I. A.,
Geiger T.,
Greshake A.,
Pillinger C. T.
Publication year - 1995
Publication title -
meteoritics
Language(s) - English
Resource type - Journals
eISSN - 1945-5100
pISSN - 0026-1114
DOI - 10.1111/j.1945-5100.1995.tb01211.x
Subject(s) - meteorite , carbonaceous chondrite , chondrite , parent body , diamond , geology , astrobiology , geochemistry , isotope , mineralogy , materials science , physics , metallurgy , nuclear physics
— 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 recognised meteorite group. Particularly important in this respect is the very low C/N ratio and δ 13 C 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.