COMBINATION OF PALEOMAGNETIC AND STRESS DATA - A CASE-STUDY FROM NORTH HUNGARY

The paper presents the results of a combined palaeomagnetic and microt ectonic study in North Hungary. It analyses the relationship between p alaeomagnetically indicated rotations and stress axes, at both site an d regional level. As a result appropriate palaeomagnetic corrections a re determined for different sets of microtectonic structures. The orie ntation of the stress axes is restored to its original position by cor recting for mass rotation as it is manifested in declination deviation from the present north. This process eliminates the apparent rotation of the stress field during the Early Miocene. However, our investigat ions show that real change in orientation of stress axes (about 20 deg rees) did occur during the Middle Miocene. The reconstructed stress fi eld is in good agreement with kinematic models which suggest eastward escape of the area (as part of the North Pannonian Block). Our results may be best interpreted by attributing the palaeomagnetically indicat ed rotations partly to rotation of the whole area as a relatively rigi d body, and partly to local block rotations.