| LA-MC-ICP-MS独居石微区原位U-Pb同位素年龄测定 |
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| 关键词:monazite in situ LA-MC-ICP-MS U-Pb isotopic dating |
| 基金项目:国土资源部公益性行业科研专项“非锆石类富铀矿物U-Pb同位素定年方法研究”(编号: 200911043-15) |
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| 摘要: |
| In Situ LA-MC-ICP-MS U-Pb Isotopic Dating of Monazite |
| Characterized by rich U, Th and low initial Pb content, monazite is an ideal object for U-Pb and Th-Pb isotopic dating. Due to the existence of monazite in a variety of rocks, the U-Th-Pb dating of monazite has a broad application prospect. A new method is reported in this paper. The monazite samples were analyzed by using 193 nm ArF excimer laser ablation system coupled with NEPUNE multi-collector inductively coupled plasma mass spectrometer. The monazite samples AL01, BL02 and CL03 were dated by this method. The weighted average 206Pb/238U ages of AL01 and BL02 were (288.3±1.1) Ma (n=19) and (446.8±2.3) Ma (n=41) respectively, and the isochron age of CL03 was (396.8±8.8) Ma (n=55), showing satisfactory results. |
| CUI Yu-rong,ZHOU Hong-ying,GENG Jian-zhen,LI Huai-kun,LI Hui-min.2012.In Situ LA-MC-ICP-MS U-Pb Isotopic Dating of Monazite[J].Acta Geoscientica Sinica,33(6):865-876. |
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