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| 磷灰石微区原位LA-MC-ICP-MS U-Pb同位素定年 | |
| 引用本文： | 周红英, 耿建珍, 崔玉荣, 李怀坤, 李惠民. 磷灰石微区原位LA-MC-ICP-MS U-Pb同位素定年[J]. 地球学报, 2012, (6): 857-864. doi: 10.3975/cagsb.2012.06.03 |
| 作者姓名： | 周红英 耿建珍 崔玉荣 李怀坤 李惠民 |
| 作者单位： | 中国地质调查局天津地质矿产研究所;中国地质调查局天津地质矿产研究所;中国地质调查局天津地质矿产研究所;中国地质调查局天津地质矿产研究所;中国地质调查局天津地质矿产研究所 |
| 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) |
| 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). |
| 关 键 词： | 磷灰石 微区原位U-Pb同位素定年 LA-MC-ICP-MS |
In Situ U-Pb Dating of Apatite Using LA-MC-ICP-MS |
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| ZHOU Hong-ying,GENG Jian-zhen,CUI Yu-rong,LI Huai-kun and LI Hui-min. In Situ U-Pb Dating of Apatite Using LA-MC-ICP-MS[J]. Acta Geoscientica Sinica, 2012, 33(6): 857-864. DOI: 10.3975/cagsb.2012.06.03 | |
| Authors: | ZHOU Hong-ying GENG Jian-zhen CUI Yu-rong LI Huai-kun LI Hui-min |
| Affiliation: | Tianjin Institute of Geology and Mineral Resources, China Geological Survey;Tianjin Institute of Geology and Mineral Resources, China Geological Survey;Tianjin Institute of Geology and Mineral Resources, China Geological Survey;Tianjin Institute of Geology and Mineral Resources, China Geological Survey;Tianjin Institute of Geology and Mineral Resources, China Geological Survey |
| 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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