Surface and subsurface geology of the Hontomín structure, Western Pyrenees
A detailed geological study was conducted in the Hontomín area in the western Pyrenees,Northern Spain, focusing on structural characterization by integrating available subsurfacedata with a newly developed surface geological map. It reveals a relatively simple surfacestructure, with the Upper Cretac...
| Autores: | , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2025 |
| País: | España |
| Institución: | Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya) |
| Repositorio: | Recercat. Dipósit de la Recerca de Catalunya |
| OAI Identifier: | oai:recercat.cat:2445/224556 |
| Acceso en línea: | https://hdl.handle.net/2445/224556 |
| Access Level: | acceso abierto |
| Palabra clave: | Geologia estructural Cartografia geològica Geofísica Sismologia Pirineus Structural geology Geological mapping Geophysics Seismology Pyrenees |
| Sumario: | A detailed geological study was conducted in the Hontomín area in the western Pyrenees,Northern Spain, focusing on structural characterization by integrating available subsurfacedata with a newly developed surface geological map. It reveals a relatively simple surfacestructure, with the Upper Cretaceous generally dipping gently eastward, except at thesouthern margin, where they are deformed into tight E-W-trending folds. In contrast,the unconformable Cenozoic layers dip only a few degrees southward. However, seismicdata interpretation reveals a much more complex subsurface structure. It is dominatedby a broad dome, cored by Upper Triassic salt, which has significantly influenced theoverlying stratigraphy and structure. Above the salt, the Jurassic and Lower Cretaceousunits exhibit moderate folding, a deformation style that is not apparent at the surface.The deep structure is controlled by a major E-W trending thrust fault, which is notclearly expressed at surface except through small-scale, tight folds aligned in the samedirection. This study highlights the importance of integrating surface mapping withgeophysical data, both for accurately interpreting subsurface geology when planning forCO₂ injection operations. |
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