Isotopic analyses of barium in meteorites and in terrestrial samples
- Creators
- Eugster, O.
- Tera, F.
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Wasserburg, G. J.
Abstract
Isotopic composition and concentration of barium in six stone meteorites and the silicate inclusions of two iron meteorites and three terrestrial samples were measured by use of a 'double spike' isotopic dilution technique in order to correct for laboratory fractionation. Any differences between the abundances of the isotopes in meteoritic and terrestrial Ba were found to be less than 0.1% for all isotopes. The per cent abundances of Ba found in our work for Ba^(138), Ba^(137), Ba^(136), Ba^(135), Ba^(134), Ba^(132), and Ba^(130) are 71.699, 11.232, 7.853, 6.592, 2.417, 0.1012, and 0.1058, respectively. Because of the higher precision, these abundances should replace the currently accepted values. These results show the variations in the Ba isotopes reported by S. Umemoto (1962) to be unsubstantiated.
Additional Information
Copyright 1969 by the American Geophysical Union. (Received January 24, 1969; revised April 1, 1969.) We wish to thank D. S. Burnett for valuable discussions and suggestions and D. A. Papanastassiou for his support in the mass spectrometry. We are indebted to our colleagues who supplied meteorite samples used in this work: Pasamonte, Leedey, Forest City, and Weekeroo Station were obtained from the Nininger Meteorite Collection at the Arizona State University through the aid of C. W. Moore. El Taco was obtained from H. Hintenberger, M.P.I., Mainz, Germany. Bruderheim was given to us by L. T. Silver from a sample provided to him by R. E. Folinsbee. Nuevo Laredo was given to us by L. T. Silver. Abee was provided by J. A. V. Douglas, Geological Survey of Canada. This work was supported by the National Science Foundation (grants GP 9114 and GP 7976). Contribution 1606 of the California Institute of Technology.Attached Files
Published - jgr11857.pdf
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Additional details
- Eprint ID
- 51446
- Resolver ID
- CaltechAUTHORS:20141107-122849606
- GP 9114
- NSF
- GP 7976
- NSF
- Created
-
2014-11-07Created from EPrint's datestamp field
- Updated
-
2021-11-10Created from EPrint's last_modified field
- Other Numbering System Name
- Caltech Division of Geological Sciences
- Other Numbering System Identifier
- 1606