Comment on 'Actinide abundances in ordinary chondrites' by Hagee et AL

Details Comment on 'Actinide abundances in ordinary chondrites' by Hagee et AL Comment on 'Actinide abundances in ordinary chondrites' by Hagee et AL

Aug 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991gecoa..55.2355m&link_type=abstract

Geochimica et Cosmochimica Acta (ISSN 0016-7037), vol. 55, Aug. 1991, p. 2355-2358; Author's Reply, p. 2359-2363.

Computer Science

Abundance, Actinide Series, Chondrites, Fission Products, Meteoritic Composition, Rare Earth Elements, Carbonaceous Chondrites, Plutonium Isotopes, Solar System Evolution

Scientific paper

This paper comments on the Hagee et al. (1990) conclusions (on their measurements of Pu-244 fission Xe, U, Th, and light REEs abundances in Olivenza, Barwell, Pultusk, Guarena, and Marion chondrites), that measurements of Pu/U in any single equilibrated ordinary chondrite specimen should statistically be within + or - 20-30 percent of the average solar value. Here, the Xe-isotope data are reexamined by choosing the isotopic composition of Xe found in the carbonaceous chondrite Murray as the primary standard for the trapped Xe, and the fission Xe contents were calculated using a computer rather than conventional graphical method. It is shown that the agreements among the Pu-244 fission Xe contents calculated here and by Hagee et al. are reasonable only for Guarena and Marion chondrites. For the Olivenza chondrite, the value calculated by Hagee et al. is lower than the presently calculated by about 0.4 x 10 to the 12th cc/g. In Barwell, however, where Hagee et al. reported to contain about the same amount of Pu-244 fission Xe as did Olivenza, none was found by present calculations.

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