Meteorites cosmochemical classification

Undifferentiated and differentiated meteorites. 03.1.3.2 Cosmochemical classification of elements Cl Chondrites as Standard for Solar Abundances... 

THE CHEMICAL COMPOSITION OF CHONDRITIC METEORITES AND THE COSMOCHEMICAL CLASSIFICATION OF ELEMENTS... 

Larimer J. W. (1988) The cosmochemical classification of the elements. In Meteorites and the Early Solar System (eds. J. F. Kerridge and M. S. Matthews). University of Arizona Press, Tucson, pp. 375-393. 

The latest review of meteorite classifications and properties is given by Wasson (1985). A simplified classification scheme is given in table 8. Bulk lanthanide abundances in chondritic meteorites do not indicate any major cosmochemical fractionation during their formation. Lanthanide patterns in chondrites are relatively uniform, and bulk compositions show no dependence on volatility. No Eu or Yb anomalies are apparent. This information indicates that extreme temperatures were not experienced during their formation. Loss of more volatile elements was common among the H, L, LL, C2, and C3 classes, whereas E chondrites, with fully reduced Fe, have their full complement of volatile elements. 

---

See also in sourсe #XX -- [ , ]

---