RT Journal Article
T1 An Upper Devonian foredeep basin in the Southern Central Iberian Zone (Variscan Iberian Massif): Consequences for Variscan plate dynamics
A1 Rubio Pascual, Francisco J.
A1 Martín Parra, Luis Miguel
A1 Matas, Jerónimo
A1 Rodríguez Fernández, Luis Roberto
A1 González Menéndez, L.
A1 Moreno Martín, Diana
A1 Díez Fernández, Rubén
AB New field research and revision of previous works in the Variscan Iberian Massif unravel the existence of an Upper Devonian foredeep basin in the southern Central Iberian Zone, close to the suture area with the Ossa-Morena Zone. Superimposed Tournaisian-Visean extensional basins, a Serpukhovian-Bashkirian foreland basin, and the Late Variscan wrench tectonics obscure this foredeep basin. This synorogenic sedimentation is related to the Late Devonian continental subduction featured by a high-pressure metamorphic belt exposed to the south of this area. The unravelling of this trough with marine turbiditic sedimentation and fragments of terrestrial plant fossils, allows the reinterpretation of the Upper Devonian deposits along the northern half of the Iberian Massif. It also explains the lack of Middle Devonian sedimentary rocks in most of the massif. The geometry and stratigraphy correspond to a collisional foreland basin with its classical depozonal elements. The structure of the foreland basin solves discussions about tectonic polarity in the Ossa-Morena - Central Iberian Variscan collision, the upper plate thus corresponds to the Upper Allochthon of the Ossa-Morena Zone. The tracking of the NE migration (current coordinates) of the bulge area suggests a ∼ 5.5 cm/yr rate of Upper Devonian convergence and up to ∼800 km of continental underplating. We also propose a correlation with the Upper Devonian high-pressure Basal Units and the synorogenic sediments of the NW Iberian Massif. Conclusions can be extended to the plate architecture between other peri-Gondwana terranes of the Armorican assemblage and the northern Gondwana margin.
PB Elsevier
SN 0040-1951
YR 2025
FD 2025-10-27
LK https://hdl.handle.net/20.500.14352/126303
UL https://hdl.handle.net/20.500.14352/126303
LA eng
NO Rubio Pascual, F. J., Martín Parra, L. M., Matas, J., Fernández, L. R. R., Menéndez, L. G., Moreno-Martín, D., & Fernández, R. D. (2025). An upper devonian foredeep basin in the southern central iberian zone (Variscan iberian massif): Consequences for variscan plate dynamics. Tectonophysics, 913, 230893. https://doi.org/10.1016/j.tecto.2025.230893
NO MCIN/AEI/ 10.13039/501100011033
DS Docta Complutense
RD 31 dic 2025