Other
Scientific paper
Apr 1993
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993gecoa..57.1587b&link_type=abstract
Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 57, no. 7, p. 1587-1603.
Other
33
Carbonaceous Chondrites, Geochemistry, Oxygen Isotopes, Rare Gases, Sahara Desert (Africa), Antarctic Regions, Chemical Composition, Mineralogy, Petrology, Meteorites, Saharan Meteorites, Stony Meteorites, Chondrites, Pairing, C Chondrites, Cr Chondrites, Samples, Meteorite, Chemistry, Isotopes, Acfer, El Djouf, Petrography, Geochemistry, Rare Gases, Aluminum 26, Classification, Lithology, Chondrules, Metal, Inclusions, Composition, Mineralogy, Description, Oxygen, Carbon, Nitrogen, Major Elements, Comparis
Scientific paper
Data on the chemical composition, mineralogy, abundance, and isotopic composition of recently found Sahara meteorites are presented. The nine Acfer samples and the El Djouf 001 meteorite are considered to belong to the same parent meteoroid and are classified as a CR chondrite. The Acfer-El Djouf meteorite has a CI-chondritic composition of nonvolatile elements, in particular CI ratios of refractory elements to Mg. The presence of metal with chondritic Fe/Ni ratios, olivine with relatively low FeO contents and with high Cr is attributed to the primitive, unequilibrated nature of Acfer-El Djouf and other CR chondrites. The carbon and nitrogen stable isotropic composition of the Acfer-El Djouf chondrite lies within the range of other members of the CR group. Rare gases of the Acfer-El Djouf meteorite contain a comparatively large solar wind component, in excess of that in Renazzo. The cosmic-ray exposure age of the Acfer-El Djouf meteorite is about 6 million years.
Ash Richard D.
Bischoff Addi
Clayton Robert N.
Endress Magnus
Grady Michael
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