鉱石中の微量鉛,トリウム,およびウランの同位体比測定
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概要
- 論文の詳細を見る
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.
- 日本質量分析学会の論文