Resumen de Tectonic and geodynamic significance of paleomagnetic rotations in the Iberian Chain, Spain.

Ramón Vegas Martínez, M. T. Juarez, O. Kälin

• español

  Las evidencias obtenidas en calizas del Jurásico Superior de la Cadena Ibérica sobre (a) una componente magnética secundaria (cretácica) diferente de la magnetización primaría y (b) rotaciones locales de eje vertical de ambas componentes, delimitan en parte la historia evolutiva del movimiento de la Placa Ibérica e implican una reconsideración del concepto de "Iberia estable". La coexistencia de sitios rotados y no rotados apoya además un modelo tectónico de convergencia oblicua con relaciones diferenciales entre cobertera y basamento

• English

  Evidence from Late Jurassic limestones of the central Iberian Chain for (a) a secondary (Cretaceous) magnetic component different in declination by some 75° (clockwise) from the direction of the primary magnetization, and for (b) local vertical-axis rotations of both these components, provides additional constraints on the history of motion of the Iberian Plate and implies a reconsideration of the concept of «stable Iberia». Moreover, the coexistence of rotated and non-rotated sites across the Iberian Chain supports a tectonic model of intraplate oblique convergence and differential cover-to-basement relationships