Coexistencia de varias direcciones de esfuerzos recientes (Mioceno superior-Cuaternario) en la Cordillera Ibérica

• Autores: Ángel Luis Cortés Gracia, José Luis Simón Gómez, Antonio María Casas Sáinz
• Localización: Geotemas (Madrid), ISSN 1576-5172, Nº. 1, 1, 2000 (Ejemplar dedicado a: V Congreso Geológico de España (Alicante, 10-14 julio 2000)), págs. 53-56
• Idioma: español
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• Resumen

  • Palaeostresses inferred from brittle mesostructures in the Iberian Chain suggest a recent stress field characterised by three directional modes of the maximum horizontal stress (SHmJ : NNE to NE-SW, N-S and NW-SE. Geological and geophysical data indicate the co-existence of these orientations from the upper M iocene to present-day in NE Iberia. These orientations suggest the existence of several stress sources responsible for the dominant directions o fS x in northeastern Iberia. Stress states with NW-SE trend o f 5 are compatible with the dominant pattern established for western Europe. N to NE orientations o f S suggest the occurrence of tectonic forces coming from the Pyrenean zone. Extensional structures within a broad-scale compressional stress field can be related to both the decreasing o f relative stress magnitudes from active margins to intraplate regions and rifting proccesses ocurring in eastern Iberia.