In situ rutile U-Pb dating by laser ablation-MC-ICPMS
In situ rutile U-Pb dating by laser ablation-MC-ICPMS
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DOI：
10.2343/geochemj.2.0267
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发表时间：
2013-08
影响因子：
0.8
通讯作者：
X. Xia;Zhong‐Yuan Ren;G. Wei;Le Zhang;M. Sun;Y. Wang
中科院分区：
文献类型：
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作者：
X. Xia;Zhong‐Yuan Ren;G. Wei;Le Zhang;M. Sun;Y. Wang
版权所有©2013，由日本地球化学会提供。等人的研究。(2007)，Zack等人。(2011)和Kooijman等人。(2010)。该方法仅限于具有足够铀的金红石颗粒，以便获得合适的铅信号强度(Zack等人，2011年)。众所周知，多收集器ICPMS具有灵敏度高、峰形平坦、可同时采集等优点，非常适合于精确的同位素比值分析。一些研究人员已经将LA-MC-ICPMS应用于金红石U-Pb测年，如Vry和Baker(2006)，Warren等人。(2012)和Bracciali等人。Vry和Baker(2006)只获得了PbPb值，没有获得U-Pb值。因此，LAMC-ICPMS在金红石U-Pb定年中的潜力还没有得到充分的发掘。本文报道了一种新的分析方法，并用LA-MC-ICPMS对4个不同的天然金红石样品进行了分析。我们的结果表明，这项技术可以给出精确和准确的金红石U-Pb年龄结果，即使在大约1ppm的U。
Copyright © 2013 by The Geochemical Society of Japan. et al. (2007), Zack et al. (2011) and Kooijman et al. (2010). This method is limited to rutile grains with sufficient U in order to get suitable Pb signal intensity (Zack et al., 2011). It is well known that multi collector ICPMS offers advantages in terms of higher sensitivity, flat top peak shape and simultaneous acquisition, features ideal for precise isotope ratio analyses. Some researchers have applied LA-MC-ICPMS to U–Pb rutile dating such as Vry and Baker (2006), Warren et al. (2012) and Bracciali et al. (2013), but the amount of works using this method are limited, and Vry and Baker (2006) only obtained Pb– Pb ages and no U–Pb ages. Therefore the potential of LAMC-ICPMS to rutile U–Pb dating has not been fully explored. We hereby report a new analytical protocol and the analytical results for 4 different natural rutile samples using LA-MC-ICPMS in this paper. Our results demonstrate that this technique can yield precise and accurate U–Pb dating results for rutile even with ca. 1 ppm U.