| 地浸砂岩型铀矿成矿年代学研究 |
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| 关键词:sandstone-type uranium deposit correction with U-Ra equilibrium coefficient U-Pb isochron ore-forming age |
| 基金项目:本文为中国核工业地质局地质项目（编号：BRIUG-1218-0203 )和国防科工委核能开发专项项目（编号：BRIUG-04-HN-4 )部分研究成果。 |
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| 摘要: |
| Geochronogy of Leached Sandstone-type Uranium Deposits |
| This paper suggests a method in which the uranium contents of uranium ore samples are corrected with the U-Ra equilibrium coefficient, and then a U-Pb isochron is drawn. In this way, we can obtain the ages of leached sandstone-type uranium deposits in uranium-bearing sedimentary basins. From the geochronologic studies of sandstone-type uranium deposits, it is discovered that the ore-forming processes of sandstone-type uranium deposits are characterized by "episodes" and multi-stages. Various uranium ore-for-ming ages in sedimentary basins of different tectonic units indicate that uranium mineralization is closely related to the evolutionary history of tectonic lifting of basins and the ancient climate at that time. |
| XIA Yuliang,LIU Hanbin.2005.Geochronogy of Leached Sandstone-type Uranium Deposits[J].Acta Geoscientica Sinica,26(z1):127-129. |
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