In situ Nd isotopic measurement of natural geological materials by LA-MC-ICPMS
In situ Nd isotopic measurement of natural geological materials by LA-MC-ICPMS
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DOI：
10.1007/s11434-008-0166-z
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发表时间：
2008-05
影响因子：
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通讯作者：
Yue-heng Yang;Jinfeng Sun;Liewen Xie;H. Fan;Fu-guan Wu
中科院分区：
文献类型：
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作者：
Yue-heng Yang;Jinfeng Sun;Liewen Xie;H. Fan;Fu-guan Wu
利用新测定的Sm同位素丰度校正144 Sm对144 Nd的同量异位素干扰，并建立Sm和Nd之间的质量偏差关系，在Neptune多接收电感耦合等离子体质谱仪上对磷灰石、钛铁矿、独居石和钙钛矿等高Nd含量天然地质样品进行了一系列原位Nd同位素测量（MC-ICPMS），耦合到193 nm ArF准分子激光烧蚀系统。结果表明，Ce对轻稀土富集地质矿物Nd同位素分析的精度和准确度没有显著影响，对于Sm/Nd<1（147 Sm/144 Nd <0.6）的材料，该方法能有效地获得可靠的143 Nd/144 Nd和147 Sm/144 Nd比值。当与微量元素和U-Pb同位素数据相结合时，原位Nd同位素数据可以提供重要的地质作用信息。
Using newly determined Sm isotopic abundances for correcting the isobaric interference of144Sm on144Nd and the established mass bias relationship between Sm and Nd, a series ofin situNd isotopic measurements were conducted for relatively high Nd concentrations of natural geological materials, including apatite, titanite, monazite and perovskite on a Neptune multi-collector inductively coupled plasma mass spectrometry (MC-ICPMS), coupled to a 193 nm ArF excimer laser ablation system. The results show that Ce has no significant influence on the precision and accuracy of Nd isotopic analyses for LREE-enriched geological minerals and that our approach is efficient in obtaining reliable143Nd/144Nd and147Sm/144Nd ratios for those materials with Sm/Nd<1 (147Sm/144Nd<0.6). When combined with trace element and U-Pb isotope data, thein situNd isotopic data can provide important information on geological processes.