Trace Element Characterisation of MAD-559 Zircon Reference Material for Ion Microprobe Analysis
Trace Element Characterisation of MAD-559 Zircon Reference Material for Ion Microprobe Analysis
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DOI：
10.1111/ggr.12238
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发表时间：
2018-12-01
影响因子：
3.8
通讯作者：
Vennari, Cara E.
中科院分区：
文献类型：
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作者：
Coble, Matthew A.;Vazquez, Jorge A.;Vennari, Cara E.
我们记录了产自马达加斯加的天然锆石宝石 MAD-559 的成分，这是一种用于校准 SIMS 测量的锆石中微量元素质量分数的新参考材料。 MAD-559 的成分是通过相对于有据可查的锆石参考材料 91500 进行校准来量化的，我们为此汇编了现有的已发表数据（Mg、Al、Y、稀土元素、Hf、U、Th），并进行了新的测量来表征不太常见的测量元素（Li、Be、B、F、Na、P、K、Ca、Sc、Ti、Fe、Nb）的质量分数。以 SL13、CZ3 和 MAD-1 锆石以及 NIST SRM 玻璃的测量结果作为质量控制材料，以测试测量偏差和重复性。我们显示，MAD-559 的大多数微量元素测量结果的中间精度在 +/- 3% 和 +/- 5% RSD 之间，这是基于 SIMS 在 24 小时内对 25 个单独的抛光锆石芯片进行的 139 次测量，以及在五个单独的分析会话中进行的重复测量。还在两个不同的实验室通过 LA-ICP-MS 测量了微量元素质量分数，并通过电子探针测量了主要元素组成，以与 SIMS 测量的结果进行比较。基于激光拉曼和高光谱阴极发光光谱，我们表明 MAD-559 相对于结晶锆石（例如 SL13 和 91500 锆石）而言，由于辐射损伤而具有较高的晶体无序性。尽管MAD-559锆石的高累积α剂量使其成为地质年代学参考材料的较差的，但多次、多种测量方法测量的微量元素质量分数结果的一致性表明它是锆石微分析微量元素质量分数定量的理想参考材料。
We document the composition of a natural zircon gemstone sourced from Madagascar, MAD-559 - a new reference material for calibrating trace element mass fractions in zircon measured by SIMS. The composition of MAD-559 was quantified by calibration relative to the well-documented zircon reference material 91500, for which we compiled existing published data (Mg, Al, Y, rare earth elements, Hf, U, Th) and performed new measurements to characterise the mass fraction of less commonly measured elements (Li, Be, B, F, Na, P, K, Ca, Sc, Ti, Fe, Nb). Measurement results of SL13, CZ3 and MAD-1 zircons and NIST SRM glasses were performed as quality control materials to test measurement bias and repeatability. We show the intermediate precision for most trace element measurement results of MAD-559 to be between +/- 3% and +/- 5% RSD based on 139 measurements by SIMS on twenty-five individual polished zircon chips measured during a 24-h period, as well as repeat measurements performed over five separate analytical sessions. Trace element mass fractions were also measured by LA-ICP-MS in two different laboratories, and major element compositions measured by electron microprobe, to compare with results measured by SIMS. Based on laser Raman and hyperspectral cathodoluminescence spectroscopy, we show MAD-559 to have high crystal disorder due to radiation damage relative to crystalline zircon (e.g., SL13 and 91500 zircon). Although the high cumulative alpha dose of MAD-559 zircon makes it a poor reference material for geochronology, the consistency of the trace element mass fraction results measured in multiple sessions and by various measurement methods shows that it is an ideal reference material for microanalytical trace element mass fraction quantification of zircon.