K.J. Dobson
U and Th zonation in Fish Canyon Tuff zircons: Implications for a zircon (U–Th)/He standard
Dobson, K.J.; Stuart, F.M.; Dempster, T.J.; EIMF
Authors
F.M. Stuart
T.J. Dempster
EIMF
Abstract
The inability to accurately determine the distribution of U and Th in zircon crystals analysed using (U–Th)/He is a major source of error, and limits the confidence in subsequent data interpretation. The Fish Canyon Tuff (FCT) zircon standard shows (U–Th)/He age reproducibility in excess of ±10%. We have tested the extent to which this is due to U and Th zonation using a combination of cathodoluminescence and ion probe analysis of a population of FCT zircons. Primarily we find that FCT zircons exhibit extreme U and Th zonation, and the population has large inter-crystalline variability. Furthermore, the net cathodoluminescence intensity from the FCT zircons is negatively correlated with U and Th concentration, allowing cathodoluminescence emission to be used as a proxy for U and Th zonation. This correlation was exploited to constrain the U and Th zonation within the crystal population, and to show that the poor age reproducibility of the FCT zircons is consistent with the observed zonation.
Citation
Dobson, K., Stuart, F., Dempster, T., & EIMF. (2008). U and Th zonation in Fish Canyon Tuff zircons: Implications for a zircon (U–Th)/He standard. Geochimica et Cosmochimica Acta, 72(19), 4745-4755. https://doi.org/10.1016/j.gca.2008.07.015
Journal Article Type | Article |
---|---|
Acceptance Date | Jul 24, 2008 |
Online Publication Date | Aug 3, 2008 |
Publication Date | Oct 1, 2008 |
Deposit Date | May 5, 2016 |
Publicly Available Date | May 31, 2016 |
Journal | Geochimica et Cosmochimica Acta |
Print ISSN | 0016-7037 |
Publisher | Meteoritical Society |
Peer Reviewed | Peer Reviewed |
Volume | 72 |
Issue | 19 |
Pages | 4745-4755 |
DOI | https://doi.org/10.1016/j.gca.2008.07.015 |
Files
Accepted Journal Article
(628 Kb)
PDF
Copyright Statement
NOTICE: this is the author’s version of a work that was accepted for publication in Geochimica et Cosmochimica Acta. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Geochimica et Cosmochimica Acta, 72, 1 October 2008, 10.1016/j.gca.2008.07.015
You might also like
In situ observation of the percolation threshold in multiphase magma analogues
(2020)
Journal Article
Vesicle shrinkage in hydrous phonolitic melt during cooling
(2020)
Journal Article
Downloadable Citations
About Durham Research Online (DRO)
Administrator e-mail: dro.admin@durham.ac.uk
This application uses the following open-source libraries:
SheetJS Community Edition
Apache License Version 2.0 (http://www.apache.org/licenses/)
PDF.js
Apache License Version 2.0 (http://www.apache.org/licenses/)
Font Awesome
SIL OFL 1.1 (http://scripts.sil.org/OFL)
MIT License (http://opensource.org/licenses/mit-license.html)
CC BY 3.0 ( http://creativecommons.org/licenses/by/3.0/)
Powered by Worktribe © 2024
Advanced Search