Condicionantes variscos, extensión mesozoica e inversión cenozoica del anticlinal de Tabuenca-Rodanas (Cordillera Ibérica)
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Abstract
El anticlinal de Tabuenca – Rodanas es una estructura NW-SE situada en el sector septentrional de la Rama Aragonesa de la Cordillera Ibérica. Está compuesto por una gran variedad de materiales paleozoicos y mesozoicos. Las estructuras de esta zona son el resultado de tres etapas tectónicas. En primer lugar, el basamento se plegó durante la orogenia varisca, dando lugar a anticlinales y sinclinales NW-SE debido a la compresión N-S o NE-SW. La evolución del Varisco tardío queda registrada en fallas kilométricas NWSE que compartimentan el basamento paleozoico y en la formación de cuencas transtensivas pérmicas. La etapa de rifting mesozoico se registra en la formación de grandes fallas NW-SE que delimitan las cuencas triásicas y en la fracturación de los materiales, dando dos direcciones de extensión, NE-SW y NW-SE. Por último, durante la orogenia alpina se produce la inversión de las fallas y la formación de pliegues NW-SE debidos a la compresión NE-SW.
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The Tabuenca – Rodanas anticline is a NW-SE structure located in the northern sector of the Aragonese Branch of the Iberian Chain. It is composed by a wide variety of Palaeozoic and Mesozoic materials. The structures found in this area are the result of three tectonic stages. Firstly, the basement was folded during the Variscan orogeny, this same stage giving rise to NW-SE anticlines and synclines due to N-S or NE-SW compression. The Late Variscan evolution is recorded in kilometric NW-SE faults that compartmentalise the Paleozoic basement and the formation of Permian extensional basins. The Mesozoic rifting stage is recorded in the formation of large NW-SE faults bounding Triassic basins and in the fracturing of the materials, giving two directions of extension, NE-SW and NW-SE. Finally, the Alpine orogeny is reflected by the reactivation of faults and the formation of NW-SE folds due to NE-SW compression.
The Tabuenca – Rodanas anticline is a NW-SE structure located in the northern sector of the Aragonese Branch of the Iberian Chain. It is composed by a wide variety of Palaeozoic and Mesozoic materials. The structures found in this area are the result of three tectonic stages. Firstly, the basement was folded during the Variscan orogeny, this same stage giving rise to NW-SE anticlines and synclines due to N-S or NE-SW compression. The Late Variscan evolution is recorded in kilometric NW-SE faults that compartmentalise the Paleozoic basement and the formation of Permian extensional basins. The Mesozoic rifting stage is recorded in the formation of large NW-SE faults bounding Triassic basins and in the fracturing of the materials, giving two directions of extension, NE-SW and NW-SE. Finally, the Alpine orogeny is reflected by the reactivation of faults and the formation of NW-SE folds due to NE-SW compression.







