The eastern Black Sea-Caucasus region during the Cretaceous: New evidence to constrain its tectonic evolution
-
Sosson, Marc
Université de Nice Sophia Antipolis, CNRS, IRD, Observatoire de la Côte d’Azur, UMR Géoazur, 250, Sophia Antipolis, France
-
Stephenson, Randell
University of Aberdeen, School of Geosciences, Aberdeen, United Kingdom
-
Sheremet, Yevgeniya
I. Subbotin Institute of Geophysics, Kiev, Ukraine
-
Rolland, Yann
Université de Nice Sophia Antipolis, CNRS, IRD, Observatoire de la Côte d’Azur, UMR Géoazur, 250, Sophia Antipolis, France
-
Adamia, Shota
Javakhishvili Tbilisi State University, Tbilisi, Georgia
-
Melkonian, Rafael
Institute of Geological Sciences, Yerevan, Armenia
-
Kangarli, Talat
Institute of Geology, Baku, Azerbaijan
-
Yegorova, Tamara
I. Subbotin Institute of Geophysics, Kiev, Ukraine
-
Avagyan, Ara
Institute of Geological Sciences, Yerevan, Armenia
-
Galoyan, Ghazar
Institute of Geological Sciences, Yerevan, Armenia
-
Danelian, Taniel
Université de Lille - Sciences et Technologies, CNRS, UMR 8198 Evo-Eco-Paleo, 59655 Villeneuve d’Asq, France
-
Hässig, Marc
Université de Nice Sophia Antipolis, CNRS, IRD, Observatoire de la Côte d’Azur, UMR Géoazur, 250, Sophia Antipolis, France
-
Meijers, Maud
University of Minnesota, Minneapolis, USA
-
Müller, Carla
Nannoplankton biostratigraphy consulting, Santok, Poland
-
Sahakyan, Lilit
Institute of Geological Sciences, Yerevan, Armenia
-
Sadradze, Nino
Javakhishvili Tbilisi State University, Tbilisi, Georgia
-
Alania, Victor
Javakhishvili Tbilisi State University, Tbilisi, Georgia
-
Enukidze, Onice
Javakhishvili Tbilisi State University, Tbilisi, Georgia
-
Mosar, Jon
University of Fribourg, Fribourg, Switzerland
Show more…
Published in:
- Comptes Rendus Geoscience. - 2016, vol. 348, no. 1, p. 23–32
English
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).
-
Faculty
- Faculté des sciences et de médecine
-
Department
- Département de Géosciences
-
Language
-
-
Classification
-
Geology
-
License
-
License undefined
-
Identifiers
-
-
Persistent URL
-
https://folia.unifr.ch/unifr/documents/305127
Statistics
Document views: 49
File downloads: