| 磷灰石微区原位LA-MC-ICP-MS U-Pb同位素定年 |
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| 引用本文：周红英,耿建珍,崔玉荣,李怀坤,李惠民.2012.磷灰石微区原位LA-MC-ICP-MS U-Pb同位素定年[J].地球学报,33(6):857-864. |
| DOI：10.3975/cagsb.2012.06.03 |
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| 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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| 中文摘要:利用激光剥蚀多接收器电感耦合等离子体质谱法(LA-MC-ICP-MS), 建立了磷灰石微区原位U-Pb同位素定年新方法, 本文给出了这一新方法的分析流程, 报道了利用这一新方法对5个磷灰石样品的分析结果, 并应用同位素稀释-热电离质谱法(ID-TIMS)对一些样品定年结果进行了验证。磷灰石工作标样SDG的U-Pb同位素年龄: (1596±15) Ma (MSWD=1.5, n=7, LA-MC-ICP-MS), (1602±13) Ma (MSWD=0.578, n=5, ID-TIMS); 某铁矿石中磷灰石的LA-MC-ICP-MS U-Pb同位素年龄: (125±14) Ma (MSWD=0.68, n=25), (124.2±3.5) Ma (MSWD=1.5, n=37); 新疆阿尔金地区片麻岩中磷灰石的LA-MC-ICP-MS U-Pb同位素年龄: (250.8±3.9) Ma (MSWD=8.6, n=26), (245.4±2.9) Ma (MSWD=2.1, n=39)。 |
| 中文关键词:磷灰石 微区原位U-Pb同位素定年 LA-MC-ICP-MS |
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| In Situ U-Pb Dating of Apatite Using LA-MC-ICP-MS |
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| Abstract:A new in situ U-Pb dating method for apatite using LA-MC-ICP-MS has been established, and the experimental process is described in this paper. 5 apatite U-Pb dating results determined by the new method and verified by ID-TIMS method are reported in this paper, with the data obtained being standard qpatite SDG, (1596±15) Ma (MSWD=1.5, n=7, LA-MC-ICP-MS), (1602±13) Ma (n=5, MSWD=0.578, ID-TIMS); apatite samples from an iron deposit, (125±14) Ma (n=25), (124.2±3.5) Ma (MSWD=1.5, n=37); apatite from gneissic rocks in the Altun Mountains of Xinjiang, (250.8±3.9) Ma (MSWD=8.6, n=26), (245.4±2.9) Ma (MSWD=2.1, n=39). |
| keywords:apatite in situ U-Pb dating LA-MC-ICP-MS |
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