Articles | Volume 4, issue 2
Research article
15 Sep 2022
Research article |  | 15 Sep 2022

230Th ∕ U isochron dating of cryogenic cave carbonates

Paul Töchterle, Simon D. Steidle, R. Lawrence Edwards, Yuri Dublyansky, Christoph Spötl, Xianglei Li, John Gunn, and Gina E. Moseley


Interactive discussion

Status: closed

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • RC1: 'Comment on gchron-2022-10', Karel Zak, 09 May 2022
    • AC1: 'Reply on RC1', Paul Toechterle, 22 Jul 2022
  • RC2: 'Comment on gchron-2022-10', David Richards, 16 Jun 2022
    • AC2: 'Reply on RC2', Paul Toechterle, 22 Jul 2022

Peer review completion

AR: Author's response | RR: Referee report | ED: Editor decision
ED: Publish subject to minor revisions (further review by editor) (28 Jul 2022) by Norbert Frank
AR by Paul Toechterle on behalf of the Authors (05 Aug 2022)  Author's response    Author's tracked changes    Manuscript
ED: Publish subject to technical corrections (12 Aug 2022) by Norbert Frank
ED: Publish subject to technical corrections (15 Aug 2022) by Klaus Mezger(Editor)
Short summary
Cryogenic cave carbonates (CCCs) provide a marker for past permafrost conditions. Their formation age is determined by Th / U dating. However, samples can be contaminated with small amounts of Th at formation, which can cause inaccurate ages and require correction. We analysed multiple CCCs and found that varying degrees of contamination can cause an apparent spread of ages, when samples actually formed within distinguishable freezing events. A correction method using isochrons is presented.