Abstract
Using newly determined Sm isotopic abundances for correcting the isobaric interference of 144Sm on 144Nd and the established mass bias relationship between Sm and Nd, a series of in situ Nd 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 reliable 143Nd/144Nd and 147Sm/144Nd ratios for those materials with Sm/Nd<1 (147Sm/144Nd<0.6). When combined with trace element and U-Pb isotope data, the in situ Nd isotopic data can provide important information on geological processes.
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Supported by the National Natural Science Foundation of China (Grant Nos. 40773008 and 40325006)
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Yang, Y., Sun, J., Xie, L. et al. In situ Nd isotopic measurement of natural geological materials by LA-MC-ICPMS. Chin. Sci. Bull. 53, 1062–1070 (2008). https://doi.org/10.1007/s11434-008-0166-z
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DOI: https://doi.org/10.1007/s11434-008-0166-z