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首页> 外文期刊>Journal of Analytical Atomic Spectrometry >Fundamental studies on the ablation behaviour of Pb/U in NIST 610 and zircon 91500 using laser ablation inductively coupled plasma mass spectrometry with respect to geochronology
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Fundamental studies on the ablation behaviour of Pb/U in NIST 610 and zircon 91500 using laser ablation inductively coupled plasma mass spectrometry with respect to geochronology

机译：关于地球年代学，使用激光烧蚀电感耦合等离子体质谱法对NIST 610和Zircon 91500中Pb / U烧蚀行为的基础研究

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摘要

Studies of the ablation rate, particle size distribution and signal intensities from NIST 610 and zircon 91500 were carried out using UV-ns LA-ICP-MS to investigate the limitations for non-matrix matched quantification of the Pb and U system. All major elements (Zr, Si, Hf) as well as Pb and U were measured in both matrices using different crater diameters. The results indicate two different laser ablation dominated sources of fractionation which prohibit non-matrix matched calibration for accurate age determination. Selective loss of Pb (crater diameter independent) and crater diameter dependent retention of U through phase change in the crater during the ablation of zircon are the two sources of fractionation which occur. However, at certain operating conditions the loss of Pb and the retention of U within the crater are equal. This leads to ages, which randomly agree with the reference age.
机译：使用UV-ns LA-ICP-MS对NIST 610和锆石91500的烧蚀率，粒度分布和信号强度进行了研究，以研究Pb和U系统非矩阵匹配定量分析的局限性。在两个矩阵中使用不同的坑口直径测量了所有主要元素（Zr，Si，Hf）以及Pb和U。结果表明，两种不同的激光烧蚀占主导地位的分馏源禁止非矩阵匹配的校准，以准确确定年龄。在锆石的烧蚀过程中，Pb的选择性损失（与坑直径无关）和通过坑中相变而保留的U取决于坑直径，这是发生分级分离的两个来源。但是，在某些操作条件下，铅的损失与铀在火山口中的保留是相等的。这导致年龄，其随机地与参考年龄一致。

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    《Journal of Analytical Atomic Spectrometry》 |2010年第1期|21-27|共7页
  • 作者

    Barbara K. Kuhn; Karin Birbaum; Yan Luo; Detlef Guenther;

  • 作者单位

    Laboratory of Inorganic Chemistry, ETH Zurich, 8093 Zurich, Switzerland Zuercherische Arbeitsgemeinschaft zur Erforschung und Bekampfung der Staublungen in der Schweiz, Institute for Mineralogy and Petrography, 8092 Zurich, Switzerland;

    Laboratory of Inorganic Chemistry, ETH Zurich, 8093 Zurich, Switzerland;

    Analysis and Air Quality Section, Air Quality Research Division, Atmospheric Science and Technology Directorate, Science and Technology Branch, Environment Canada, Ottawa, Ontario, Canada K1A 0H3;

    Laboratory of Inorganic Chemistry, ETH Zurich, 8093 Zurich, Switzerland;

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