Geochronology
Geochronology
GChron
Articles | Volume 8, issue 1
Articles | Volume 8, issue 1
https://doi.org/10.5194/gchron-8-19-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/gchron-8-19-2026
© Author(s) 2026. This work is distributed under
the Creative Commons Attribution 4.0 License.
Articles | Volume 8, issue 1
Research article
 | 
16 Jan 2026
Research article |  | 16 Jan 2026

Cosmogenic 3He exposure dating in mafic rocks by “Virtual mineral separation” of pyroxene

Marie Bergelin, Greg Balco, and Richard A. Ketcham

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Short summary
We developed a faster and simpler method to measure helium gas in targeted minerals within whole rocks to determine how long they have been exposed at Earth's surface. Instead of manually separating minerals, our method uses heat to release gas from the specific minerals of interest. This reduces time, cost, and physical effort, making it easier to collect large amounts of data when studying landscape change or when only small rock samples are available.
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