Geochronology
Geochronology
GChron
Articles | Volume 8, issue 4
Articles | Volume 8, issue 4
https://doi.org/10.5194/gchron-8-645-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gchron-8-645-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 8, issue 4
Research article
 | 
20 Oct 2026
Research article |  | 20 Oct 2026

On the effects of ageing and annealing on the apatite and fission-track etch rates

Raymond Jonckheere, Florian Trilsch, Jie Liu, Pengfei Zhai, and Thorsten Nagel

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Short summary
The fission-track method traces the thermal histories of rocks based on microscopic examination of etched damage trails from uranium fission in apatite. Etching involves two velocities: the rate, vT, of etchant advance along the damage trails and the etch rate, vR, of undamaged apatite. Their values govern which grains are suitable for counting and which tracks are suitable for measurement. Our work provides numerical estimates of vT and vR, and investigates the factors that control them.
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