| 惠安堡地区砂岩型铀矿U-Pb等时线年龄测定 |
| |
| 引用本文： | 朱明燕,贾恒,崔建勇,刘宇昂.惠安堡地区砂岩型铀矿U-Pb等时线年龄测定[J].铀矿地质,2012,28(3):157-164. |
| |
| 作者姓名： | 朱明燕 贾恒 崔建勇 刘宇昂 |
| |
| 作者单位： | 1. 核工业北京地质研究院,北京,100029
2. 核工业203研究所,陕西咸阳,712000 |
| |
| 摘 要： | 在前人研究的基础上,对惠安堡地区砂岩型铀矿样品尝试建立了从样品前处理→质谱测量→数据处理一套系统的砂岩型铀矿U-Pb等时线年龄测定分析方法。对比了2种溶样法——两酸(盐酸、硝酸)溶样法和三酸(盐酸、硝酸、氢氟酸)溶样法对测量结果的影响,并引用U-Ra平衡系数Kp对砂岩型铀矿U-Pb等时线年龄测量结果进行了铀质量分数的校正。实验结果表明,采用两酸溶样法能有效避免该地区砂岩型铀矿中碎屑矿物中所含普通铅的引入,减少了实验误差。采用前人用U-Ra平衡系数修正样品的铀的丢失或富集,再进行U-Pb等时线拟合的方法,获得了更切合实际的成矿年龄。
|
| 关 键 词： | 砂岩型铀矿 U-Ra平衡系数 U-Pb等时线年龄 两酸溶样 |
Study on U-Pb Isochron Dating for a Sandstone Hosted Uranium Deposit in Huianpu Area |
| |
| ZHU Ming-yan
,
JIA Heng
,
CUI Jian-yong
,
LIU Yu-ang.Study on U-Pb Isochron Dating for a Sandstone Hosted Uranium Deposit in Huianpu Area[J].Uranium Geology,2012,28(3):157-164. |
| |
| Authors: | ZHU Ming-yan JIA Heng CUI Jian-yong LIU Yu-ang |
| |
| Institution: | 1. Beijing Research Institute of Uranium Geology, Beijing 100029, China; 2. Research Institute No. 203, CNNC, Xianyang, Sha＇anxi 712000, China) |
| |
| Abstract: | Based on the previous research work, the method of U-Pb isochron dating for a sandstone hosted uranium deposit in Huianpu area had been studied. According to the characteristics and genesis of the sandstone hosted uranium deposit, different digestions for the samples from the sandstonehosted uranium deposit had been compared. The results shew that the two acids digestion could effectively avoid the interference of the ordinary Pb from quartzite in samples from the sandstone hosted uranium deposit and reduce the errors. In the same way, the ore formation age of the sandstone hosted uranium deposit which may be more realistic can been obtained with the method of correcting uranium content in those samples by considering the U-Ra equilibrium coefficient and then fitting the U-Pb isochron line. |
| |
| Keywords: | sandstone-hosted uranium deposit U-Ra equilibrium coefficient U-Pb isochron dating two acids digestion |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
|
