| Did natural fission of 235U in the earth lead to formation of the supercontinent Columbia? |
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| 作者姓名： | John J.W.Rogers |
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| 作者单位： | Department of Geological Sciences,University of North Carolina at Chapel Hill,Chapel Hill,NC 27599-3315,USA |
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| 摘 要： | Steady decline in the percentage of 235U in terrestrial uranium made natural fission impossible after about 1.8 Ga.Fission before 1.8 Ga disturbed the lead isotope system at various places worldwide,su...
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| 关 键 词： | 哥伦比亚 裂变 自然 地球 铅同位素 超高温灭菌 佐治亚州 铀含量 |
| 收稿时间： | 2012-02-28 |
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