Variance in Measurements of Rb and Sr Isotopic Ratios of the Some Sample, and Its Effect to the Age Determi nation(as to the Standard Sample JG-I)
スポンサーリンク
概要
- 論文の詳細を見る
A standard sample JG-I, a granodiorite from Sori, Gunma Prefecture indicates the following isotopic compositions:Rb content has a range of178. 9to183. 4ppm;Sr content has a range of182. 5to187. 5ppm;the ratio of Sr<SUP>87</SUP>/Sr<SUP>86</SUP> has a range of0. 7113to 0. 7121. The ratio of Rb<SUP>87</SUP>/Sr<SUP>86</SUP>, calculated from above data, has a range of2. 692to2. 839. In an isochron diagram, the error in vertical axis is ±0. 06%, and that in horizontal axis is±2. 6%. Thus, the error in the calculated age is?±10. 6%, in a case of the rock of which age is approximately100million years. When the correction of the multiplier was not adequate, the initial ratio of Sr<SUP>87</SUP>/Sr<SUP>86</SUP> in isochron is also effected.
- 日本質量分析学会の論文
著者
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Sato Shinji
Department Of Accelerator And Medical Physics National Institute Of Radiological Sciences
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Iizumi Shigeru
Department Of Geology Shimane University
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KAGAMI HIROO
Department of Geology and Mineralogy, Tokyo Kyoiku University
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SATO SHINJI
Department of Geology and Mineralogy, Tokyo Kyoiku University
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IIZUMI SHIGERU
Department of Geology and Mineralogy, Tokyo Kyoiku University
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