Articles | Volume 12, issue 1
Solid Earth, 12, 237–251, 2021
https://doi.org/10.5194/se-12-237-2021

Special issue: New insights on the tectonic evolution of the Alps and the...

Solid Earth, 12, 237–251, 2021
https://doi.org/10.5194/se-12-237-2021

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 et al.

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Interactive discussion

Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
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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)
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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.