Articles | Volume 6, issue 4
https://doi.org/10.5194/gchron-6-607-2024
https://doi.org/10.5194/gchron-6-607-2024
Short communication/technical note
 | 
25 Nov 2024
Short communication/technical note |  | 25 Nov 2024

Short communication: Nanoscale heterogeneity of U and Pb in baddeleyite from atom probe tomography – 238U series alpha recoil effects and U atom clustering

Steven Denyszyn, Donald W. Davis, and Denis Fougerouse

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Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
ED: Publish subject to revisions (further review by editor and referees) (29 Jun 2024) by Noah M McLean
AR by Steven Denyszyn on behalf of the Authors (29 Jun 2024)  Author's response   Author's tracked changes   Manuscript 
ED: Reconsider after major revisions (further review by editor and referees) (30 Jun 2024) by Noah M McLean
AR by Steven Denyszyn on behalf of the Authors (29 Jul 2024)  Author's response   Author's tracked changes   Manuscript 
ED: Publish subject to minor revisions (further review by editor) (08 Sep 2024) by Noah M McLean
AR by Steven Denyszyn on behalf of the Authors (17 Sep 2024)  Author's response   Author's tracked changes   Manuscript 
ED: Publish as is (06 Oct 2024) by Noah M McLean
ED: Publish as is (06 Oct 2024) by Klaus Mezger (Editor)
AR by Steven Denyszyn on behalf of the Authors (08 Oct 2024)
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Short summary
Decay of U to Pb in baddeleyite is used for dating mafic rocks, but some daughter Pb atoms can be ejected out of the crystal, resulting in ages that seem too young. Atom probe tomography was used to map U and Pb atoms in 3D within baddeleyite crystals and estimate the average distance that Pb atoms are displaced by recoil. This allows us to test the relationship between crystal size and apparent age. There is also evidence for clustering of U atoms, inviting more work on how this may occur.