Extensional reactivation of the Penninic frontal thrust 3&thinsp;Myr ago as evidenced by U–Pb dating on calcite in fault zone cataclasite

Bilau, Antonin; Rolland, Yann; Schwartz, Stéphane; Godeau, Nicolas; Guihou, Abel; Deschamps, Pierre; Brigaud, Benjamin; Noret, Aurélie; Dumont, Thierry; Gautheron, Cécile

doi:https://doi.org/10.5194/se-12-237-2021

Articles | Volume 12, issue 1

https://doi.org/10.5194/se-12-237-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Special issue:

New insights into the tectonic evolution of the Alps and the...

https://doi.org/10.5194/se-12-237-2021

© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 12, issue 1

Research article

|

28 Jan 2021

Research article |

| 28 Jan 2021

Extensional reactivation of the Penninic frontal thrust 3 Myr ago as evidenced by U–Pb dating on calcite in fault zone cataclasite

Antonin Bilau, Yann Rolland, Stéphane Schwartz, Nicolas Godeau, Abel Guihou, Pierre Deschamps, Benjamin Brigaud, Aurélie Noret, Thierry Dumont, and Cécile Gautheron

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Final revised paper (published on 28 Jan 2021)
Supplement to the final revised paper
Preprint (discussion started on 02 Sep 2020)
Supplement to the preprint

Interactive discussion

Status: closed

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

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RC1: 'X', Alfons Berger, 28 Sep 2020
- AC1: 'Response to Alfons Berger RC1', Antonin Bilau, 30 Nov 2020
RC2: 'REVIEW of the paper SE-202-119', Anonymous Referee #2, 03 Nov 2020
- AC2: 'Response to Anonymous Referee RC2', Antonin Bilau, 30 Nov 2020

Peer-review completion

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

AR by Antonin Bilau on behalf of the Authors (30 Nov 2020) Author's response Manuscript

ED: Publish subject to minor revisions (review by editor) (03 Dec 2020) by Giancarlo Molli

AR by Antonin Bilau on behalf of the Authors (08 Dec 2020) Author's response Manuscript

ED: Publish as is (11 Dec 2020) by Giancarlo Molli

ED: Publish as is (11 Dec 2020) by Federico Rossetti (Executive editor)

AR by Antonin Bilau on behalf of the Authors (11 Dec 2020)

Short summary

As a result of the collision between the European and Apulian plates, the Alps have experienced several evolutionary stages. The Penninic frontal thrust (PFT) (major thrust) was associated with compression, and now seismic studies show ongoing extensional activity. Calcite mineralization associated with shortening and extensional structures was sampled. The last deformation stages are dated by U–Pb on calcite at ~ 3.5 and ~ 2.5 Ma. Isotope analysis evidences deep crustal fluid mobilization.