Articles | Volume 3, issue 2
https://doi.org/10.5194/gchron-3-545-2021
https://doi.org/10.5194/gchron-3-545-2021
Research article
 | 
13 Dec 2021
Research article |  | 13 Dec 2021

Deformation recorded in polyhalite from evaporite detachments revealed by 40Ar ∕ 39Ar dating

Lachlan Richards, Fred Jourdan, Alan Stephen Collins, and Rosalind Clare King

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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-2021-16', Marissa Tremblay, 28 Jun 2021
    • AC1: 'Reply to RC1, RC2, and RC3', Lachlan Richards, 06 Aug 2021
  • RC2: 'Comment on gchron-2021-16', Anonymous Referee #2, 29 Jun 2021
    • AC1: 'Reply to RC1, RC2, and RC3', Lachlan Richards, 06 Aug 2021
  • RC3: 'Comment on gchron-2021-16', Anonymous Referee #3, 02 Jul 2021
    • AC1: 'Reply to RC1, RC2, and RC3', Lachlan Richards, 06 Aug 2021

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) (19 Aug 2021) by Darren Mark
AR by Lachlan Richards on behalf of the Authors (15 Oct 2021)  Author's tracked changes   Manuscript 
EF by Manal Becker (19 Oct 2021)  Author's response 
ED: Publish as is (19 Oct 2021) by Darren Mark
ED: Publish subject to technical corrections (20 Oct 2021) by Klaus Mezger (Editor)
AR by Lachlan Richards on behalf of the Authors (26 Oct 2021)  Manuscript 
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Short summary
This research is part of a PhD thesis examining evaporite detachments characteristics. 40Ar/39Ar geochronology is employed to constrain the timing of formation and deformation events. A diagenetic age of ~514 Ma is interpreted from the oldest significant step age. Other step ages may represent a Cambrian–Permian deformation event or a complex mixing age of diagenetic Ar with partially reset Ar during the Cenozoic. We report the first closure temperature for polyhalite between 254 and 277 °C.