--> ABSTRACT: Interaction of Black Sea Deposition with Tectonics of Surrounding Orogens, by Sheya, Cameron R.; Nemcok, Michal; Geletti, Riccardo; Marson, Iginio; Dvorakova, Vlastimila; #90135 (2011)

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Interaction of Black Sea Deposition with Tectonics of Surrounding Orogens

Sheya, Cameron R.1; Nemcok, Michal 1; Geletti, Riccardo 2; Marson, Iginio 2; Dvorakova, Vlastimila 3
(1)Energy and Geoscience Institute, Salt Lake City, UT. (2) The National Institute of Oceanography and Experimental Geophysics, Trieste, Italy. (3) Czech Geological Survey, Brno, Czech Republic.

Structural data from onshore outcrops, gravity data, magnetic data, offshore wells and offshore seismic profiles indicate that the spatial and temporal development of the Greater Caucasus, Lesser Caucasus, Eastern Pontides, Western Pontides and Balkans from the Oligocene to the Recent controlled sediment entry points into Western and Eastern Black Sea basins as well as distribution of sediment provenances, sediment transport pathways and geometries of fan systems.

This effect included uplifting regions representing areas of accelerated erosion, features with positive relief serving as sediment transport dividers, orogenic reentrants and other lower portions of orogenic relief and axes of foreland basins capturing sediment entry points into the basin, and spatial and temporal distribution of orogenic loading contributing to geometries of fan systems.

The youngest orogenic events responsible for the present-day shape of the Balkans took part during Middle Eocene - Oligocene. The main geometry of the northern portion of both Western and Eastern Pontides shaped during Eocene - Recent. The main orogenic events controlling the Lesser Caucasus load distribution happened during Eocene - Early Miocene. The youngest orogenic events responsible for the present-day shape of the Greater Caucasus took part during Late Miocene - Recent. One more area of the positive relief in the study, during Oligocene - Early Miocene, were Andrusov and Shatsky ridges located inside the Black Sea depositional system.

There are eight persistent fan systems throughout the Black Sea depositional system. They are: Danube, Varna, Ergene, Sakarya, Terne, Rize, Bel’ Shaya Laba and Don systems. The Terne, Rize, Ergene and Sakarya fan systems are located in front of orogenic reentrants. Bel’Shaya Laba, Danube and Varna systems are located in front of foreland basin axes of respective orogen systems. The Don system is located in front of a lower portion of orogenic relief.

 

AAPG Search and Discovery Article #90135©2011 AAPG International Conference and Exhibition, Milan, Italy, 23-26 October 2011.