Publication
- Names
-
- M.K. Weisberg
- M. Prinz
- R.N. Clayton
- T.K. Mayeda
- Title
- The CR (Renazzo-type) carbonaceous chondrite group and its implications
- Abstract
- 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.
- Keywords
- meteorites, carbonaceous chondrites, CR chondrites, meteorite Al Rais, meteorite Renazzo, meteorite MAC 87320, meteorite Y790112, meteorite Y791498, meteorite Y793495, meteorite EET87711, meteorite EET87747, meteorite EET87812, meteorite EET87846, meteorite EET87847, meteorite EET87850, meteorite El Djouf 001, meteorite Acfer 059, meteorite Acfer 087, meteorite Acfer 097, meteorite Acfer 114, meteorite Acfer 139, meteorite Acfer 186, meteorite Acfer 187, meteorite Acfer 209, meteorite Acfer 270, mineralogy, oxygen isotopes, classification
- Content
- material-matter, planetary sciences
- Year
- 1993
- Journal
- Geochimica et Cosmochimica Acta
- Volume
- 57
- Number
- 7
- Pages
- 1567 - 1586
- Pages number
- 20
- Document type
- article
- Publication state
- published
- Comments
- modal abundances of some CR chondrites, mineralogical description - interpretation in terms of extent of aqueous alteration