Polos Paleomagnéticos de Iberia de los últimos 300 millones de años

Abstract

A discussion of existing Iberian palaeomagnetic data for the last 300 Ma is presented. In order to analyze the internal consistency between the palaeomagnetic and oceanic record and to investigate the relative movement of Iberia with respect to African and Eurasian Plates, the Iberian Curve for the last 200 Ma is compared with the African and European master Curves of Besse y Courtillot (2002). Aptian- Albian Iberian poles are in disagreement with the African poles. These poles are considered remagnetized at 95-100 Ma. Another discrepancy is observed around 70 Ma. This is explained by the erroneous assumption of Srivastava et al. (1990) that Iberia and African moved together between 33 and 21 anomalies. The Euler poles for these times are, therefore, erroneous. Palaomagnetic data suggest a similar movement of the Iberian and African Plates up to 127 Ma. Then, Iberia rotated faster than Africa with respect to Eurasia. Iberian rotation (related to Eurasia) ended 70 Ma ago.