| 10 μm尺度锆石U-Pb年龄的LA-MC-ICP-MS测定 |
| |
| 关键词:LA-MC-ICP-MS ion counter U-Pb dating 10-micron-sized zircons |
| 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) |
|
| 摘要点击次数: 3577 |
| 全文下载次数: 6228 |
| 摘要: |
| Ten-micron-sized Zircon U-Pb Dating Using LA-MC-ICP-MS |
| A method of in situ U-Pb dating of 10-micron-sized zircons using LA-MC-ICP-MS is reported in this paper. All the U-Pb isotopes were simultaneously collected by the ion counters and the farday cups. Four international zircon standards (GJ-1, 91500, M257 and Temora) and two metamorphic zircon samples (I9801 and 05SD07) were measured. The weighted mean U-Pb ages of GJ-1, 91500, M257 and Temora obtained in 10 μm single spot ablasion model are (602±3) Ma (n=32), (1058±3) Ma (n = 29), (561.9±2.5) Ma (n=32) and (414.7±2.3) Ma (n=36), whereas the mean ages of GJ-1 and Temora are (596.9±4.5) Ma (n=22) and (417.9±2.5) Ma (n=32) in 5 μm curve ablasion model. The results are in excellent agreement with the previously reported data. The U-Pb ages of I9801 and 05SD07 are (426±2) Ma (n=30) and (1815±10) Ma (n=16) in 10 μm single spot ablasion model, (427±3) Ma (n=32) and (1789±32) Ma (n=15) in 5 μm curve ablasion model; the results are credible and consistent with SHRIMP dating results. Hence it is feasible to carry out 10-micron-sized zircon U-Pb dating using LA-MC-ICP-MS. |
| GENG Jian-zhen,ZHANG Jian,LI Huai-kun,LI Hui-min,ZHANG Yong-qing,HAO Shuang.2012.Ten-micron-sized Zircon U-Pb Dating Using LA-MC-ICP-MS[J].Acta Geoscientica Sinica,33(6):877-884. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
|
|
|
|
|