Articles | Volume 11, issue 6
https://doi.org/10.5194/se-11-2303-2020
https://doi.org/10.5194/se-11-2303-2020
Research article
 | 
30 Nov 2020
Research article |  | 30 Nov 2020

Unraveling the origins and P-T-t evolution of the allochthonous Sobrado unit (Órdenes Complex, NW Spain) using combined U–Pb titanite, monazite and zircon geochronology and rare-earth element (REE) geochemistry

José Manuel Benítez-Pérez, Pedro Castiñeiras, Juan Gómez-Barreiro, José R. Martínez Catalán, Andrew Kylander-Clark, and Robert Holdsworth

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AR: Author's response | RR: Referee report | ED: Editor decision
AR by Juan Gómez-Barreiro on behalf of the Authors (30 Jul 2020)  Author's response   Manuscript 
ED: Publish subject to technical corrections (16 Aug 2020) by Puy Ayarza
ED: Publish subject to minor revisions (review by editor) (26 Aug 2020) by Federico Rossetti
AR by Juan Gómez-Barreiro on behalf of the Authors (10 Sep 2020)  Author's response   Manuscript 
ED: Publish subject to minor revisions (review by editor) (24 Sep 2020) by Federico Rossetti
AR by Juan Gómez-Barreiro on behalf of the Authors (29 Sep 2020)  Author's response   Manuscript 
ED: Publish as is (02 Oct 2020) by Federico Rossetti
ED: Publish as is (02 Oct 2020) by Federico Rossetti (Executive editor)
AR by Juan Gómez-Barreiro on behalf of the Authors (08 Oct 2020)
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Short summary
The Sobrado unit represents an allochthonous tectonic slice of exhumed high-grade metamorphic rocks formed during a complex sequence of orogenic processes in the middle to lower crust. We have combined U–Pb geochronology and REE analyses (LASS-ICP-MS) of accessory minerals in migmatitic paragneiss (monazite, zircon) and mylonitic amphibolites (titanite) to constrain the evolution. A Middle Devonian minimum age for HP metamorphism has been obtained.