Single-pulse laser ablation-inductively coupled plasma-mass spectroscopy U-Pb dating of thin zircon rims: An application to metamorphic rocks from Mount Everest, eastern Nepal
Single-pulse laser ablation-inductively coupled plasma-mass spectroscopy U-Pb dating of thin zircon rims: An application to metamorphic rocks from Mount Everest, eastern Nepal
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单脉冲激光烧蚀-电感耦合等离子体质谱法对薄锆石边缘进行 U-Pb 定年：在尼泊尔东部珠穆朗玛峰变质岩中的应用
DOI：
10.1016/j.chemgeo.2020.119903
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Tohru Danhara
中科院分区：
文献类型：
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作者：
Hideki Iwano;Takafumi Hirata;J. Hosoi;H. Sakai;Yuji Orihashi;Tohru Danhara
本研究描述了一种使用激光烧蚀电感耦合等离子体质谱 (LA-ICP-MS) 进行锆石外表面 U-Pb 定年的改进方法。通过准分子和飞秒激光器安装在聚四氟乙烯中的锆石的单脉冲 LA 产生了分辨率为 0.1 μm 的年龄深度剖面。将该技术应用于尼泊尔东部珠穆朗玛峰地区喜马拉雅高山晶体的样本，揭示了年龄为 15 ± 1 Ma 的外缘。大多数这些边缘在颗粒抛光横截面的阴极发光图像上是不可见的。
This study describes an improved method for U–Pb dating of external zircon surfaces using laser ablation–inductively coupled plasma–mass spectrometry (LA–ICP–MS). Single-pulse LA of zircons mounted in Teflon by Excimer and femtosecond lasers produced age–depth profiles with 0.1 μm resolution. Application of this technique to samples from the Higher Himalayan Crystallines, Mount Everest region, eastern Nepal, revealed outer rims with ages of 15 ± 1 Ma. Most of these rims were not visible on cathodoluminescence images of polished cross-sections of the grains.