Nanoscale occurrence of Pb in an Archean zircon

Satoshi Utsunomiya, Chris S. Palenik, John W. Valley, Aaron J. Cavosie, Simon A. Wilde, Rodney C. Ewing

Research output: Contribution to journalArticle

42 Citations (Scopus)

Abstract

We report, for the first time, a direct, atomic-scale characterization of Pb in zircon (4.4-3.1 Ga) from the early Archean Yilgarn craton in Australia using high-resolution HAADF-STEM. Two forms of Pb have been identified: Pb concentrated at ∼ 3 atom% as a nanoscale patch in zircon structure, and Pb concentrated within the amorphous domain created by fission fragment damage. The first result suggests that the Pb atoms directly substitute for Zr4+ in the zircon structure, and the latter observation demonstrates that Pb diffusion can occur through amorphous regions created by radiation damage, although volume diffusion is typically considered to be the dominant mechanism for Pb diffusion. Beyond the first percolation point, i.e., when the amorphous domains overlap and form a fully interconnected network of amorphous domains, there is a new pathway for the diffusion of Pb that is faster than volume diffusion through crystalline zircon.

Original languageEnglish
Pages (from-to)4679-4686
Number of pages8
JournalGeochimica et Cosmochimica Acta
Volume68
Issue number22
DOIs
Publication statusPublished - Nov 15 2004
Externally publishedYes

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Archean
zircon
radiation damage
Atoms
Radiation damage
craton
Crystalline materials
damage

All Science Journal Classification (ASJC) codes

  • Geochemistry and Petrology

Cite this

Utsunomiya, S., Palenik, C. S., Valley, J. W., Cavosie, A. J., Wilde, S. A., & Ewing, R. C. (2004). Nanoscale occurrence of Pb in an Archean zircon. Geochimica et Cosmochimica Acta, 68(22), 4679-4686. https://doi.org/10.1016/j.gca.2004.04.018

Nanoscale occurrence of Pb in an Archean zircon. / Utsunomiya, Satoshi; Palenik, Chris S.; Valley, John W.; Cavosie, Aaron J.; Wilde, Simon A.; Ewing, Rodney C.

In: Geochimica et Cosmochimica Acta, Vol. 68, No. 22, 15.11.2004, p. 4679-4686.

Research output: Contribution to journalArticle

Utsunomiya, S, Palenik, CS, Valley, JW, Cavosie, AJ, Wilde, SA & Ewing, RC 2004, 'Nanoscale occurrence of Pb in an Archean zircon', Geochimica et Cosmochimica Acta, vol. 68, no. 22, pp. 4679-4686. https://doi.org/10.1016/j.gca.2004.04.018
Utsunomiya S, Palenik CS, Valley JW, Cavosie AJ, Wilde SA, Ewing RC. Nanoscale occurrence of Pb in an Archean zircon. Geochimica et Cosmochimica Acta. 2004 Nov 15;68(22):4679-4686. https://doi.org/10.1016/j.gca.2004.04.018
Utsunomiya, Satoshi ; Palenik, Chris S. ; Valley, John W. ; Cavosie, Aaron J. ; Wilde, Simon A. ; Ewing, Rodney C. / Nanoscale occurrence of Pb in an Archean zircon. In: Geochimica et Cosmochimica Acta. 2004 ; Vol. 68, No. 22. pp. 4679-4686.
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