Title :

The eastern Black Sea-Caucasus region during the Cretaceous: New evidence to constrain its tectonic evolution

Author(s) :

Sosson, M. [Auteur]
Géoazur [GEOAZUR 7329]
Stephenson, R. [Auteur]
Sheremet, E. [Auteur]
Rolland, Y. [Auteur]
Géoazur [GEOAZUR 7329]
Adamia, Sh [Auteur]
Melkonian, R. [Auteur]
Institute of Geological Sciences of the National Academy of Sciences of Armenia [IGS NAS RA]
Kangarli, T. [Auteur]
Hässig, M. [Auteur]
Géoazur [GEOAZUR 7329]
Avagyan, A. [Auteur]
Institute of Geological Sciences of the National Academy of Sciences of Armenia [IGS NAS RA]
Galoyan, Gh. [Auteur]
Institute of Geological Sciences of the National Academy of Sciences of Armenia [IGS NAS RA]
Yegorova, T. [Auteur]
Danelian, T. [Auteur]
Évolution, Écologie et Paléontologie (Evo-Eco-Paleo) - UMR 8198 [Evo-Eco-Paléo (EEP)]
Meijers, Maud J.M. [Auteur]
University of Minnesota [Twin Cities] [UMN]
Müller, C. [Auteur]
Sahakyan, L. [Auteur]
Institute of Geological Sciences of the National Academy of Sciences of Armenia [IGS NAS RA]
Sadradze, N. [Auteur]
Alania, V. [Auteur]
Enukidze, O. [Auteur]
Mosar, J. [Auteur]
Department of Geosciences - Earth Sciences [Fribourg]

Journal title :

Comptes Rendus Géoscience

Pages :

23-32

Publisher :

Elsevier

Publication date :

2016-01

HAL domain(s) :

Planète et Univers [physics]/Sciences de la Terre

English abstract : [en]

We report new observations in the eastern Black Sea-Caucasus region that allow reconstructing the evolution of the Neotethys in the Cretaceous. At that time, the Neotethys oceanic plate was subducting northward below the ...
Show more >We report new observations in the eastern Black Sea-Caucasus region that allow reconstructing the evolution of the Neotethys in the Cretaceous. At that time, the Neotethys oceanic plate was subducting northward below the continental Eurasia plate. Based on the analysis of the obducted ophiolites that crop out throughout Lesser Caucasus and East Anatolides, we show that a spreading center (AESA basin) existed within the Neotethys, between Middle Jurassic and Early Cretaceous. Later, the spreading center was carried into the subduction with the Neotethys plate. We argue that the subduction of the spreading center opened a slab window that allowed asthenospheric material to move upward, in effect thermally and mechanically weakening the otherwise strong Eurasia upper plate. The local weakness zone favored the opening of the Black Sea back-arc basins. Later, in the Late Cretaceous, the AESA basin obducted onto the Taurides–Anatolides–South Armenia Microplate (TASAM), which then collided with Eurasia along a single suture zone (AESA suture).Show less >

Language :

Anglais

Popular science :

Non

Collections :

• Évolution, Écologie et Paléontologie (Evo Eco Paleo) - UMR 8198

Source :

Harvested from HAL