Articles | Volume 2, issue 2
https://doi.org/10.5194/gchron-2-177-2020
https://doi.org/10.5194/gchron-2-177-2020
Research article
 | 
07 Jul 2020
Research article |  | 07 Jul 2020

Highly accurate dating of micrometre-scale baddeleyite domains through combined focused ion beam extraction and U–Pb thermal ionization mass spectrometry (FIB-TIMS)

Lee F. White, Kimberly T. Tait, Sandra L. Kamo, Desmond E. Moser, and James R. Darling

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Cited articles

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Amelin, Y., Krot, A. N., Hutcheon, I. D., and Ulyanov, A. A.: Lead isotopic ages of chondrules and calcium-aluminium-rich inclusions, Science, 80, 1678–1683, 2002. 
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Bouvier, L. C., Costa, M. M., Connelly, J. N., Jensen, N. K., Wielandt, D., Storey, M., Nemchin, A. A., Whitehouse, M. J., Snape, J. F., Bellucci, J. J., Moynier, F., Agranier, A., Gueguen, B., Schonbachler, M., and Bizzarro, M.: Evidence for extremely rapid magma ocean crystallization and crust formation on Mars, Nature, 558, 6–11, https://doi.org/10.1038/s41586-018-0222-z, 2018. 
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Short summary
The generation of highly precise and accurate ages requires crushing of the original sample so that individual mineral grains may be separated out for dating. Here, we use a focused ion beam to extract grains directly from a subset of a sample, effectively performing microsurgery to isolate individual crystals from the rock itself. This approach opens the door to high-precision dating for a variety of precious planetary materials that have previously been challenging to date.