| 质谱计逐级蒸发-沉积测定单颗粒锆石年龄原理及可靠性的证明——兼论锆石同位素地质年代学的适用性 |
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| 关键词:geochronology U-Pb,207Pb/206Pb zircon ages |
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| Principle of the single-zircon stepwise evaporation-deposition technique and the applications of zircon geochronology |
| The principle of the single-zircon stepwise evaporation-deposition technique,the correct data getting and the application are discussed in this thesis. When a crystal of zircon is being evaporated on a thermal ionization mass spectrometer,the ratios of (207Pb/206Pb)increase with time.It means that the lead loss in the inner layer of the zircon is smaller than the outer.The values of the crystal domain,where almost the enclosed systems exist,of a zircon may be the maximum otherwise there are two or more zircon generations.The key of the technique is to obtain the (207Pb/206Pb)value of the crystal domain. |
| SONG Biao.1994.Principle of the single-zircon stepwise evaporation-deposition technique and the applications of zircon geochronology[J].Acta Geoscientica Sinica,15(1,2):206-217. |
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