Neoproterozoic and post-Caledonian exhumation and shallow faulting in NW Finnmark from K–Ar dating and <i>p</i>∕<i>T</i> analysis of fault rocks

Koehl, Jean-Baptiste P.; Bergh, Steffen G.; Wemmer, Klaus

doi:https://doi.org/10.5194/se-9-923-2018

Articles | Volume 9, issue 4

https://doi.org/10.5194/se-9-923-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/se-9-923-2018

© Author(s) 2018. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 9, issue 4

Research article

|

20 Jul 2018

Research article |

| 20 Jul 2018

Neoproterozoic and post-Caledonian exhumation and shallow faulting in NW Finnmark from K–Ar dating and p∕T analysis of fault rocks

Jean-Baptiste P. Koehl, Steffen G. Bergh, and Klaus Wemmer

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Final revised paper (published on 20 Jul 2018)
Preprint (discussion started on 16 Mar 2018)

Interactive discussion

Status: closed

AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment

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- Supplement

RC1: 'Review of Neoproterozoic and post-Caledonian exhumation and shallow faulting in NW Finnmark from K/Ar dating and p/T analysis of fault-rocks', Anonymous Referee #1, 14 Apr 2018
- AC2: 'Answer to comments by anonymous referee', Jean-Baptiste Koehl, 13 Jun 2018
RC2: 'Review', David Roberts, 23 Apr 2018
- AC1: 'Answer to comments by David Roberts', Jean-Baptiste Koehl, 13 Jun 2018

Peer-review completion

AR: Author's response | RR: Referee report | ED: Editor decision

AR by Jean-Baptiste Koehl on behalf of the Authors (13 Jun 2018) Author's response Manuscript

ED: Referee Nomination & Report Request started (16 Jun 2018) by Bernhard Grasemann

RR by Anonymous Referee #1 (29 Jun 2018)

ED: Publish subject to technical corrections (01 Jul 2018) by Bernhard Grasemann

ED: Publish subject to technical corrections (01 Jul 2018) by Federico Rossetti (Executive editor)

AR by Jean-Baptiste Koehl on behalf of the Authors (02 Jul 2018) Author's response Manuscript

Short summary

We dated the formation of large faults in order to constrain the tectonic and exhumation history of the Barents Sea and northern Norway. Some of the dated faults formed apprx. 1 Ga and are much older than expected. However, most dated faults were active during two periods of extension: 375–325 and 315–265 Ma. The study of minerals along these cracks shows that exposed rocks in Finnmark were exhumed from deep (> 10 km) to shallow depth (< 3.5 km) during the two periods of extension.