scholarly journals The structure of the lithosphere, tectonics and evolution of the Scythian Plate and adjacent structures in the section of the Bs05-22 profile (according to 2-d density modeling)

2020 ◽  
Vol 16 (3) ◽  
pp. 13-29
Author(s):  
M. KOZLENKO ◽  
Yu. KOZLENKO
Keyword(s):  
Transition Zone ◽  
Black Sea ◽  
The South ◽  
Southern Boundary ◽  
East European ◽  
Scythian Plate ◽  
Adjacent Structures ◽  
Crystalline Crust ◽  
Wide Transition ◽  
West Black Sea

A density model was built along the Bs05-22 profile, which made it possible to identify individual blocks with different crustal parameters. The consolidated crust of the East European Platform (EEP) has a “key” structure. The southern boundary of the EEP is clearly fractured and falls to the south at an angle of about 83° The South Ukrainian monocline (SUM) covers not only the basement of the EEP but also the northern part of the Scythian Plate (SP). The central part of SP block overlapped by the SUM is characterized by the maximum capacity of the folded-metamorphic base. The axial part of the Karkinit Trough (KT) has a structure typical for riftogens. The rift is practically one-sided with a width of 6.5 km. The southern slope of the KT developed as a result of the falling of the surface by the mechanism of the planj-principle. The border between the Karkinit Trough and the Kalamitsky rise (KR) is clearly defined by the Sulinsko-Tarkhankutsk fault. The core of the KR is a sufficiently massive body of lenticular shape with a density corresponding to the Taurian series of the Mountainous Crimea. There is a narrow transition zone between KT and Edge step (ES). The southern edge of the Scythian plate is a 25,0 km wide transition zone to West-Black Sea depression (WBSD). Modeling established the extension of the “granodiorite” layer into the WBSD for 100 km. The crust thickness within the EEP is 44,0 km, on the Scythian plate under SUM is average 43.5 km, 37,0 km within KT and 33,0 km under ES, in the West Black Sea basin 28,7 km under the foot of the Upper Cretaceous continental slope and 21,5 km at the southern edge of the profile. In the model chosen, the density of tectonic faults in the EEP is 0,06 and in the SP — 0,14 per 1,0 km. Vertical shifts of crystalline crust blocks at SP reach 5,5 km, which is almost three times higher than at the southern flank of the EEP. The most of disjunctions are vertical and have transcrust stretch. The structure of the Earth’s crust obtained as a result of modeling allowed us to draw some conclusions about the Meso-Cenozoic evolution of the studied region in the profile section. At the southern edge of the EEP in the Late Cimmerian tectogenesis epoch there has been a revitalization, in the Alpine phase this structure was generally passive. Activity of the Cimmerian epoch was observed throughout the Scythian plate: within the Kalmitsky rise from the early phase, and in the Karkinit Trough and on the Edge step from the late Cimmerian phase. The periods of activation on the KT and KR are traced up to the Sawa phase, and on the ES — to the Walach phase of the Alpine tectogenesis inclusive.

Widespread overspill from a saline density-current channel and its interaction with topography on the south-west Black Sea shelf

Sedimentology ◽  
2013 ◽  
Vol 60 (7) ◽  
pp. 1639-1667 ◽  
Author(s):  
Richard N. Hiscott ◽  
Ali E. Aksu ◽  
Roger D. Flood ◽  
Vladimir Kostylev ◽  
Doğan Yaşar
Keyword(s):  
Black Sea ◽  
Density Current ◽  
The South ◽  
Current Channel ◽  
South West ◽  
West Black Sea

scholarly journals Tectonic structure of the zone of conjugation of the Eastern European piatform and the Scythian plate (territory of the Rostov region)

2019 ◽  
pp. 16-23
Author(s):  
A. G. Granovsky ◽  
N. V. Granovskya
Keyword(s):  
The South ◽  
Tectonic Structure ◽  
Tectonic Structures ◽  
East European ◽  
Voronezh Anteclise ◽  
The North ◽  
Rostov Region ◽  
Scythian Plate ◽  
Tectonic Development ◽  
Paleozoic Rocks

The tectonic structure in the junction zone of the East European and Scythian platforms of Rostov region has been considered. Different ages and ranks of Precambrian and Phanerozoic tectonic structures, their correlation within the studied area and tectonic zoning scheme are presented. The structure and composition of rock complexes, formation conditions and their tectonic development stages are characterized. The East European platform within the described territory is represented by two disconnected fragments of the Russian Plate. The northern fragment is the south-eastern part of the Voronezh anteclise, located to the north of the Donetsk-Astrakhan tectonic suture. The southern fragment corresponds to the eastern dipping of the Pre-Paleozoic rocks of the Ukrainian shield, forming the buried Rostov ledge. The Scythian (Epihercynian) platform located to the south of the Donetsk-Astrakhan tectonic suture, is represented by a folded Paleozoic (in some places pre-middle-Jurassic) base and a platform cover of Mesozoic-Cenozoic rocks. The part of the Scythian platform is the exposed Donbass area, where Paleozoic rocks of the base of the platform protrude to the surface and form the Donetsk ledge. The northern part of the Scythian plate, which extends over the buried folds system of Donbass, is allocated from the south by Manych over-fault deflections and called «Karpinsky shaft». The system of the Manych deflections and the territory located to the south compile the Ciscaucasian part of the Scythian plate.

scholarly journals Rhyolites of the Kiliya-Zmeinyi uplift on the Black Sea shelf: geochemical evidence of a non-subduction boundary between the East European Platform and the Scythian Plate

2021 ◽  
Vol 43 (4) ◽  
pp. 119-143
Author(s):  
K.Ye. Shnyukova
Keyword(s):  
Black Sea ◽  
East European Platform ◽  
Igneous Rocks ◽  
Late Paleozoic ◽  
The Black Sea ◽  
Junction Zone ◽  
Late Permian ◽  
East European ◽  
Northwestern Shelf ◽  
Scythian Plate

The geochemistry of rhyolites uncovered at shallow depth by a borehole on the Kiliya-Zmeinyi uplift of the Black Sea northwestern shelf northeast of Zmeinyi island, in the junction zone of the East European platform and the Scythian plate, has been studied for the first time. This zone is considered by many geologists and geophysicists as a Late Paleozoic collisional suture that had been formed due to subduction of oceanic crust of the ocean, which adjoined the East European platform from the south, under the Scythian plate; it is traced from Dobrudzha to the Caspian Sea and named North Crimean. To check the subduction nature of the boundary between the East European platform and the Scythian plate, igneous rocks’ geochemical characteristics beeng indicators of various geodynamic regimes were used. A petrogeochemical comparison of rhyolites from the borehole in Zmeinyi area with acid igneous rocks known nearby has been carried out, namely with: 1) Late Permian subalkaline granites and rhyolites Turcoaia of the Macin zone of Northern Dobruja; 2) Triassic and / or Triassic-Jurassic trachyrhyolites and rhyolites of the Tulcea zone of Northern Dobruja and the Tatarbunar complex of the Pre-Dobruja depression. Some acid rocks of various ages and genesis from the southernmost margin of the Scythian plate (southwestern Crimea on- and offshore) were taken additionally for comparison. According to the distribution of rare earth elements, the position on the discriminant geochemical diagrams and the shape of curves on the multicomponent spider diagrams, the rhyolites of the Kiliya-Zmeinyi uplift exhibit not subduction but intraplate geochemical features closest to those of granites and rhyolites Turcoaia of the Macin zone of Northern Dobruja. Considering that the latter are reputed to be Late Permian, one can assume the same age for the rhyolites from the borehole in Zmeinyi area. Taking into account section features, geophysical information and geochemical similarity of magmatism, Kiliya-Zmeinyi uplift of the northwestern shelf seems to be a continuation of the Northern Dobruja structure into the Black Sea; it was a part of the hypothetical Late Paleozoic Euxinian orogen near its northern boundary. An absence of subduction geochemical properties in the studied presumably Late Permian rhyolites indicates that the junction zone of the East European platform and the Scythian plate in the Ukrainian shelf area is not a Late Paleozoic suture, but rather represents a thrust of the Euxinian orogen.

scholarly journals New Sarmatian grave on the left bank of the Lower Dniester

2019 ◽  
Vol 8 (3) ◽  
pp. 173-178
Author(s):  
Sergey Olegovich Simonenko
Keyword(s):  
Black Sea ◽  
The Body ◽  
Left Bank ◽  
The South ◽  
Black Sea Region ◽  
North West ◽  
The North ◽  
Chronological Period ◽  
West Black Sea ◽  
West Black Sea Region

In 2018, a secondary Sarmatian burial with an impressive inventory (molded pot, pottery jug, silver earring, necklace of beads) was discovered in the Scythian mound in the course of the study of the barrow group Garden near the Glinoe village, Slobodzeya region, on the left bank of the Lower Dniester. Orientation of the buried head to the south-southeast is quite rare in the North-West Black Sea region. The cult of fire is fixed by the finds of three burned pebbles from the left to the head. A handmade pot combines features known for the dishes of a given cultural and chronological period. At the same time, the wave-like ornament in the upper part of the body was fixed only once on a similar vessel in the Danube-Dniester interfluve. Of particular interest is a pottery jug from the complex. Such forms were not previously known in the North-West Black Sea region. The closest analogies to the vessel come from the sites of the Volga-Don interfluve. Earrings identical to those found in the published grave are widely represented in the materials of the Prut-Dniester interfluve, the Middle and Lower Dniester. Necklaces of various shapes and beads belong to the most mass material received by the Sarmatians from ancient centers. The burial dates back to the 2nd century based on the analysis of the grave goods.

Geothermal condition and outlook for oil and gas deposits in the north-west Black Sea shelf

2002 ◽  
Vol 8 (2-3) ◽  
pp. 206-208
Author(s):  
V.G. Osadchyi ◽  
◽  
O.A. Prykhod'ko ◽  
I.I. Hrytsyk ◽  
◽  
...  
Keyword(s):  
Black Sea ◽  
Oil And Gas ◽  
North West ◽  
The North ◽  
West Black Sea
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