Tectonics and geothermal gradients from subduction to collision in the NW Variscan Iberian Massif

Pascual, Francisco J. Rubio; Parra, Luis Miguel Martín; Fernández, Rubén Díez; Valverde-Vaquero, Pablo; Montes, Alejandro Díez; Rodríguez, Manuel Pozo; Iglesias, Justo; Gallastegui, G.; Fernández, L. R. Rodríguez; Beranoaguirre, Aratz

doi:10.1080/00206814.2022.2073569

International Geology Review

2022

DOI: 10.1080/00206814.2022.2073569

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Tectonics and geothermal gradients from subduction to collision in the NW Variscan Iberian Massif

Francisco J. Rubio Pascual

Luis Miguel Martín Parra

Rubén Díez Fernández³

et al.

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Cited by 2 publications

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Permian thermally-induced shear of the Cossato-Mergozzo-Brissago shear zone in the W-Southalpine basement, Italy: new petrological, geochemical and U–Pb geochronological constraints from the amphibolite-facies units of the Strona Ceneri Border Zone

Arboit,

Decarlis,

Ferrando

et al. 2024

Int J Earth Sci (Geol Rundsch)

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Permian thermally-induced shear of the Cossato-Mergozzo-Brissago shear zone in the W-Southalpine basement, Italy: new petrological, geochemical and U–Pb geochronological constraints from the amphibolite-facies units of the Strona Ceneri Border Zone

Arboit,

Decarlis,

Ferrando

et al. 2024

Int J Earth Sci (Geol Rundsch)

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The influence of synorogenic extension on the crustal architecture of North Gondwana during the assembly of Pangaea (Ossa–Morena Zone, SW Iberia)

Dias da Silva,

Pereira,

Gama

et al. 2023

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A new structural study of a D 2 -M 2 tectono-thermal structure in SW Iberia (Ponte de Sor-Seda gneiss dome) characterized by a spatial distribution of telescoping isograds providing a record of Buchan-type metamorphic conditions is presented. It comprises an infrastructure made up of the Lower Gneiss (LGU) and the Intermediate Schist (ISU) units separated by early D 2 ductile extensional shear zones. The LGU and the ISU are composed of Ediacaran-Cambrian rocks that experienced the M 2 highest-grade metamorphic conditions (amphibolite facies). Late Ediacaran-Early Terreneuvian and Late Miaolingian-Early Furongian protolith ages for LGU (496 ± 3 Ma) and ISU (539 ± 2 Ma) orthogneisses are reported. The superstructure made of Cambrian-Devonian rocks (Upper Slate Unit. USU) deformed under M 2 greenschist facies, tectonically overlies the ISU across a D 2 extensional shear zone. Kinematic criteria associated with D 2 -M 2 fabrics indicate top-to-ESE-SE sense of shear. A late-D 2 brittle-ductile high-angle extensional shear zone (Seda shear zone) crosscut the gneiss dome. D 3 upright folds, thrusts and transpressive shear zones caused the steepening of D 2 structures and the local crenulation of S 2 foliation. The Mississippian D 2 -M 2 event recorded in the OMZ may be regarded as a regional scale phenomenon that markedly influenced the crustal architecture of North Gondwana during the assembly of Pangea. Supplementary material at https://doi.org/10.6084/m9.figshare.c.6828875

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Tectonics and geothermal gradients from subduction to collision in the NW Variscan Iberian Massif

Cited by 2 publications

References 79 publications

Permian thermally-induced shear of the Cossato-Mergozzo-Brissago shear zone in the W-Southalpine basement, Italy: new petrological, geochemical and U–Pb geochronological constraints from the amphibolite-facies units of the Strona Ceneri Border Zone

Permian thermally-induced shear of the Cossato-Mergozzo-Brissago shear zone in the W-Southalpine basement, Italy: new petrological, geochemical and U–Pb geochronological constraints from the amphibolite-facies units of the Strona Ceneri Border Zone

The influence of synorogenic extension on the crustal architecture of North Gondwana during the assembly of Pangaea (Ossa–Morena Zone, SW Iberia)

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