Significance of in situ SIMS chronometry of zoned monazite from the Lewisian granulites, northwest Scotland

@inproceedings{Zhu1997SignificanceOI,
  title={Significance of in situ SIMS chronometry of zoned monazite from the Lewisian granulites, northwest Scotland},
  author={X. K. Zhu and R. K. O'nions and Nicholas Stanley Belshaw and Allan James Gibb},
  year={1997}
}
Abstract In situ studies of Lewisian metamorphic monazites show them to be strongly zones in Th content, Th U ratio and 207 Pb 206 Pb age. Traverses across compositional zones of individual monazites by SIMS and EMPA show that there are no resolvable shifts between 232 Th 238 U and 208 Pb 206 Pb ratios and between Th and Pb contents in any of the profiles obtained. Furthermore, the difference in 208 Pb 232 Th ages between two zones of monazites in the same thin section is indistinguishable from… CONTINUE READING

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