The CR (Renazzo-type) carbonaceous chondrite group and its implications

Details The CR (Renazzo-type) carbonaceous chondrite group and its implications The CR (Renazzo-type) carbonaceous chondrite group and its implications

Apr 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993gecoa..57.1567w&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 57, no. 7, p. 1567-1586.

Mathematics

Logic

109

Carbonaceous Chondrites, Chondrule, Grain Size, Meteoritic Composition, Meteoritic Microstructures, Chemical Composition, Oxygen Isotopes, Petrology, Meteorites, Stony Meteorites, Chondrites, C Chondrites, Cr Chondrites, Samples, Meteorite, Laboratory Studies, Petrology, Geochemistry, Acfer, Oxygen, Isotopes, Classification, Comparisons, Description, Origin, Aqueous Alteration, Formation, Hydration, Chondrules, Matrix, Water, Procedure, Abundance, Weathering, Inclusions, Iron, Nickel, Metal, Chemistry, Phyl

Scientific paper

A petrologic, geochemical, and oxygen isotropic study of the CR chondrites including Renazzo, Al Rais, El Djouf 001 and the paired Acfer meteorites, EET87770 and the paired samples, MAC87320, Y790112, Y793495, and Y791498 is presented. It is concluded that the CR group is characterized by abundant large multilayered, Fe, Ni metal-rich, type I chondrules; abundant matrix and dark inclusions; unique assemblages of serpentine and chlorite-rich phyllosilicates and Ca-carbonates; Ca-carbonate rims on chondrules; abundant Fe, Ni metal with a positive Ni vs. Co trend and a solar Ni:Co ratio; and amoeboid olivine aggregates with Mn-rich and Mn-poor forsterite.

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