Articles | Volume 3, issue 2
https://doi.org/10.5194/gchron-3-395-2021
https://doi.org/10.5194/gchron-3-395-2021
Research article
 | 
15 Jul 2021
Research article |  | 15 Jul 2021

Exposure dating of detrital magnetite using 3He enabled by microCT and calibration of the cosmogenic 3He production rate in magnetite

Florian Hofmann, Emily H. G. Cooperdock, A. Joshua West, Dominic Hildebrandt, Kathrin Strößner, and Kenneth A. Farley

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Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on gchron-2021-10', Samuel Niedermann, 22 Apr 2021
    • AC1: 'Reply on RC1', Florian Hofmann, 08 Jun 2021
  • RC2: 'Comment on gchron-2021-10', Pierre-Henri Blard, 26 May 2021
    • AC2: 'Reply on RC2', Florian Hofmann, 09 Jun 2021

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision | EF: Editorial file upload
ED: Publish subject to technical corrections (14 Jun 2021) by Hella Wittmann-Oelze
ED: Publish subject to technical corrections (16 Jun 2021) by Greg Balco (Editor)
AR by Florian Hofmann on behalf of the Authors (16 Jun 2021)  Manuscript 
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Short summary
We use microCT scanning to improve the quality of 3He exposure ages measured in detrital magnetite. We show that the presence of inclusions can significantly increase the measured amount of 3He and thereby the exposure age. By prescreening magnetite with microCT and analyzing only inclusion-free grains, this problem can be avoided. We also calibrate the cosmogenic 3He production rate in magnetite relative to 10Be in quartz, which can be used for similar studies in the future.