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Comptes Rendus Géoscience
Volume 335, n° 8
pages 691-699 (août 2003)
Doi : 10.1016/S1631-0713(03)00122-6
Received : 25 February 2003 ;  accepted : 23 June 2003
New structural and petrologic data on Mesozoic schists in the Rhodope (Bulgaria): geodynamic implications

Nikolay G.  Bonev * ,  Gérard M.  Stampfli
Institute of Geology and Paleontology, University of Lausanne, BFSH 2, CH-1015 Lausanne, Switzerland 

*Corresponding author.

Structural analysis of low-grade rocks highlights the allochthonous character of Mesozoic schists in southeastern Rhodope, Bulgaria. The deformation can be related to the Late Jurassic-Early Cretaceous thrusting and Tertiary detachment faulting. Petrologic and geochemical data show a volcanic arc origin of the greenschists and basaltic rocks. These results are interpreted as representing an island arc-accretionary complex related to the southward subduction of the Meliata-Maliac Ocean under the supra-subduction back-arc Vardar ocean/island arc system. This arc-trench system collided with the Rhodope in Late Jurassic times. To cite this article: N.G. Bonev, G.M. Stampfli, C. R. Geoscience 335 (2003).


L'analyse structurale de roches de faible métamorphisme souligne le caractère allochtone des schistes mésozoïques du Sud-Est du Rhodope, en Bulgarie. La déformation peut être reliée au charriage du Jurassique supérieur-Crétacé inférieur et à la formation de failles de détachement au Tertiaire. Les données pétrologiques et géochimiques indiquent une origine de type arc volcanique pour les schistes verts et les roches basaltiques. Ces résultats sont interprétés comme représentant un complexe accrétionnaire d'arc insulaire en liaison avec la subduction vers le sud de l'océan Meliata-Maliac sous la supra-subduction d'arrière-arc du système océan Vardar/arc insulaire. Ce système d'accrétion est entré en collision avec le Rhodope au Jurassique supérieur. Pour citer cet article : N.G. Bonev, G.M. Stampfli, C. R. Geoscience 335 (2003).

Mots clés  : Mesozoic schists ; basalt extrusives ; thin-skinned tectonics ; Rhodope ; Vardar Ocean ; Bulgaria.

Mots clés  : schistes mésozoïques ; extrusions basaltiques ; tectonique d'amincissement de croûte ; Rhodope ; océan Vardar ; Bulgarie.

© 2003  Académie des sciences@@#104156@@

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