Articles | Volume 2, issue 2
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. 
Barboni, M., Boehnke, P., Keller, B., Kohl, I. E., Schoene, B., Young, E. D., and McKeegan, K. D.: Early formation of the Moon 4.51 billion years ago, Sci. Adv., 3, e1602365,, 2017. 
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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,, 2018. 
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.