Other
Scientific paper
Nov 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982gecoa..46.2217k&link_type=abstract
Geochimica et Cosmochimica Acta, vol. 46, Nov. 1982, p. 2217-2228.
Other
19
Abundance, Carbonaceous Chondrites, Chemical Composition, Meteoritic Composition, Classifications, Neutron Activation Analysis, Oxygen Isotopes, Petrography, Refractory Metals, Solar System
Scientific paper
Samples from seven carbonaceous chondrites were examined by neutron activation analysis to identify 29 elements for the purposes of classification into CI, CM, CO, or CV chondrite groupings. The Adelaide, Al Rais, Karoonda, A77307, and Renazzo were determined to be of compositions not closely related to previously classified groups or to each other. CV4 and CV3-an were associated with previously identified groups, while A77307 and Adelaide possessed refractory lithophilic abundances observed in the CM-CO groups, although Adelaide also showed petrographic CV characteristics. The Karoonda chondrite was heavily crystallized and displayed refractory lithophile features which indicate that it is a sample from an entirely new classification. It is suggested that the existing stock of chondrite samples are simply an incomplete segment of a broad spectrum of primitive solar system nebular materials.
Kallemeyn Gregory W.
Wasson John T.
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