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The Ukrainian Sector of the Black Sea and Crimea: the origin, tectonics and evolution
- Publisher: European Association of Geoscientists & Engineers
- Source: Conference Proceedings, 16th International Conference on Geoinformatics - Theoretical and Applied Aspects, May 2017, Volume 2017, p.1 - 5
Abstract
The results of the researches are based mainly on the interpretation of seismic reflection data along 30000 km seismic lines crossing the Ukrainian sector of the Black Sea (BS) and on geological fieldworks in the Crimea Mountains (CM). The Lower – lowermost Upper Cretaceous secession of the study area is broken into (half) grabens by rift faults having roughly SW-NE and NW-SE trends. The extensional tectonic event, which caused formation of main (half) grabens, lasted since the Albian to Cenomanian or Santonian. Most of the rift faults of the BS were partly inverted during compression in the Middle Eocene and Late Miocene. The Ukrainian BS and CM represent an inverted Early Cretaceous rift system of highly variable geometry. The tectonic units of BS originated due to the intracontinental rifting. The Western and Eastern Black Sea Basins did not develop as oceanic or suboceanic basins as suggested by up-to-date geodynamic models. The Andrusov Ridge presents the Cretaceous rift (half) graben inverted and folded by compression in the Middle Eocene. The folds of CM formed in the Eocene and Late Miocene phases of regional compression by reverse movements along planes of rift faults. The current conceptions on evolution of the BS region should be reconsidered.