engleski

The new late Jurassic - Cretaceous APW for Adria as a tectonic framework for the interpretation of paleomagnetic results from the Northern Adriatic Basin

As a result of systematic paleomagnetic studies in stable Istria and in the foreland of the Southern Alps, the Late Jurassic-Cretaceous segment of the APW for stable Adria became well-constrained by direct measurements on biostratigraphically dated carbonates deposited simultaneously on a platform and in a basin (Marton et al. 2008, 2010). This APW characterizes the movements of Adria during the named time interval and also serves as a reference framework for describing the displacements in the deformed margin of stable Adria relative to the "hard core". When Late Cretaceous paleomagnetic results are referred to this framework from the islands of the Northern Adriatic basin, no relative movements are revealed between the stable core and the deformed margin of Adria. On the contrary, Jurassic paleomagnetic directions from the mainland (Dinaricum or Dinaridic domain) exhibit an about 30° CW rotation with respect to Adria, since the CCW rotation observed for the Dinaricum for coeval rocks is less than for those for stable Adria or for its imbricated margin. The timing of the above described relative rotation is not yet solved. It can be "inherited", i.e. due to the existence of two independent platforms (Adriatic and Dinaric), could be connected to thrusting of the Dinaricum over Adriaticum or we can assume that the former did not participated in the post-Eocene CCW rotation of the former.

Late Jurassic-Cretaceous; Adria; Northern Adriatic Basin; paleomagnetic studies

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