of Earth Sciences,
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of Karen Oud
Rotation of the Moesian platform: a kinematic link between Carpathian and
Aegean orogenic systems ?
|The Moesian platform
of northern Bulgaria and southern Romania is long considered to form a
rigid, stable block bounding the Carpathian system and the Aegean system.
However, no reliable paleomagnetic data have been reported to constrain
Neogene rotation of the Moesian platform.
If the Moesian platform
is indeed rotating, it implies a causal relationship between the kinematic
evolution of the Aegean and Carpathian domains during the Middle to Late
Miocene: Aegean rotation would be accommodated in the Carpathian back-arc.
western Aegean region underwent a 50° clockwise rotation phase since
13 Ma, with the majority of the rotations occurring between 13 and 8 Ma.
Rotation values decrease towards the northwest and amount 20° CW in
the Greek Rhodope
The southern Carpathian
Foreland underwent a 30° clockwise rotation phase, between 13 and 9
Ma. This is time-equivalent to the Aegean clockwise rotation phase.
The similarity in sense
and timing of rotations is strikingly conspicuous. The absence of a major
Miocene tectonic discontinuity between the Greek Rhodope and the southern
Carpathian foreland suggests that the clockwise rotation of the Rhodope
was accommodated in the Carpathian orogenic belt through wholesale rotation
of the Moesian platform.
|To test this hypothesis,
we carry out paleomagnetic analyses of Cretaceous to Eocene series of the
Moesian platform in Bulgaria, where the Moesian platform rocks crop out
Additionally, we sample
Eocene to Oligocene sediments of the Balkanides foredeep and Mio-Pliocene
post-orogenic sediments of central Bulgaria and Oligocene volcanics of
the Bulgarian Rhodope.
The project is supervised
by Douwe van Hinsbergen and Guillaume
Dupont-Nivet, in cooperation with Radoslav Nakov (Bulgarian Academy
Publications of Karen Oud
D.J.J., Dupont-Nivet, G., Nakov, R., Oud, K. and Panaiotu, C. (2008). No
significant post-Eocene rotation of the Moesian Platform and Rhodope (Bulgaria):
implications for the kinematic evolution of the Carpathian and Aegean arcs:
Planet. Sci. Lett., 273, 345-358.