Articles | Volume 5, issue 1
https://doi.org/10.5194/gchron-5-1-2023
https://doi.org/10.5194/gchron-5-1-2023
Research article
 | 
11 Jan 2023
Research article |  | 11 Jan 2023

Examination of the accuracy of SHRIMP U–Pb geochronology based on samples dated by both SHRIMP and CA-TIMS

Charles W. Magee Jr., Simon Bodorkos, Christopher J. Lewis, James L. Crowley, Corey J. Wall, and Richard M. Friedman

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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-2022-20', Anonymous Referee #1, 23 Aug 2022
    • AC1: 'Author responce to RC 1 and 2', Charles Magee, 17 Oct 2022
  • RC2: 'Comment on gchron-2022-20', Yuri Amelin, 08 Sep 2022
    • AC1: 'Author responce to RC 1 and 2', Charles Magee, 17 Oct 2022

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) (25 Oct 2022) by Sandra Kamo
AR by Charles Magee on behalf of the Authors (05 Dec 2022)  Author's response   Author's tracked changes   Manuscript 
ED: Publish subject to technical corrections (13 Dec 2022) by Sandra Kamo
ED: Publish subject to technical corrections (13 Dec 2022) by Klaus Mezger (Editor)
AR by Charles Magee on behalf of the Authors (16 Dec 2022)  Manuscript 
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Short summary
SHRIMP (Sensitive High Resolution Ion MicroProbe) is an instrument that for decades has used the radioactive decay of uranium into lead to measure geologic time. The accuracy and precision of this instrument has not been seriously reviewed in almost 20 years. This paper compares several dozen SHRIMP ages in our database with more accurate and precise methods to assess SHRIMP accuracy and precision. Analytical and geological complications are addressed to try to improve the method.