Mass Spectrography for the Analysis of Solids(II). Determination of Isotopic Ratios of Lead, Thorium, and Uranium in Minerals
The isotopic ratios of lead, thorium, and uranium in minerals were determined by vacuum spark mass spectrography. The facts that no chemical separations were necessary, that size of minerals for analysis were very small, and that the isotopes of interest were examined in situ were advantages of this...
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| Veröffentlicht in: | Journal of the Mass Spectrometry Society of Japan 1964-01, Vol.12 (28), p.223 |
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| Hauptverfasser: | , , , , |
| Format: | Artikel |
| Sprache: | eng |
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| Zusammenfassung: | The isotopic ratios of lead, thorium, and uranium in minerals were determined by vacuum spark mass spectrography. The facts that no chemical separations were necessary, that size of minerals for analysis were very small, and that the isotopes of interest were examined in situ were advantages of this procedure. Preliminary dating by 207Pb/206Pb, 238U/206Pb, 235U/207Pb, and 232Th/208Pb by this method agreed well. The sources of discrepancies were discussed. |
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| ISSN: | 1340-8097 1880-4225 |