Isotopic anomalies in meteorites

Details Isotopic anomalies in meteorites Isotopic anomalies in meteorites

Nov 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980rpph...43.1309b&link_type=abstract

Reports on Progress in Physics, vol. 43, Nov. 1980, p. 1309-1356.

Physics

49

Abundance, Carbonaceous Chondrites, Isotope Effect, Meteoritic Composition, Solar Wind, Anomalies, Astronomical Models, Chemical Composition, Homogeneity, Lunar Composition, Nuclear Fusion, Spatial Distribution

Scientific paper

Isotopic anomalies in carbonaceous chondrites are reviewed which appear to reflect primordial heterogeneities and to indicate spatial or temporal variations, or both, in the isotopic composition of the particular elements within the protosolar nebula. Classical abundance variations in terrestrial, lunar, and meteoritic samples are briefly discussed. Nonclassical abundance anomalies discovered in carbonaceous chondrites are examined in detail, with the anomalies classified according to whether reasonably long-lived radioactive precursors appear not to exist (primary anomalies) or whether such precursors have been identified (extinct-radionuclide anomalies). Interpretations and implications of the nonclassical anomalies are considered with respect to the assumed homogeneity of the protosolar nebula, the possibilities of local production by irradiation and of an extraneous origin, and various aspects of cosmochronology.

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