A new sedimentary cover model for the southern area of the East European Platform and the Pre-Caucasus based on decompensation gravity anomalies data

2021 ◽  
Author(s):  
Mikhail Kaban ◽  
Alexei Gvishiani ◽  
Roman Sidorov ◽  
Alexei Oshchenko ◽  
Roman Krasnoperov
Keyword(s):  
East European Platform ◽  
Sedimentary Cover ◽  
Gravity Anomalies ◽  
Sedimentary Basins ◽  
The Caucasus ◽  
Near Surface ◽  
New Model ◽  
Origin And Evolution ◽  
East European ◽  
Bouguer Anomalies

<p><span>A new model has been developed for the density and thickness of the sedimentary cover in a vast region at the junction of the southern part of the East European Platform, the Pre-Caucasus and some structures adjacent to the south, including the Caucasus. Structure and density of sedimentary basins was studied by employing the approach based on decompensation of gravity anomalies. Decompensative correction for gravity anomalies reduces the effect of deep masses providing compensation of near-surface density anomalies, in contrast to the conventional isostatic or Bouguer anomalies. . The new model of sediments, which implies their thickness and density, gives a more detailed description of the sedimentary thickness and density and reveals new features which were not or differently imaged by previous studies. It helps in better understanding of the origin and evolution of the basins and provides a background for further detailed geological and geophysical studies of the region.</span></p>

scholarly journals Structure and Density of Sedimentary Basins in the Southern Part of the East-European Platform and Surrounding Area

2021 ◽  
Vol 11 (2) ◽  
pp. 512
Author(s):  
Mikhail K. Kaban ◽  
Alexei Gvishiani ◽  
Roman Sidorov ◽  
Alexei Oshchenko ◽  
Roman I. Krasnoperov
Keyword(s):  
East European Platform ◽  
Sedimentary Cover ◽  
Gravity Anomalies ◽  
Sedimentary Basins ◽  
The Black Sea ◽  
Caspian Basin ◽  
South Caspian Basin ◽  
Satellite Gravity ◽  
East European ◽  
The North

Modern satellite gravity missions and ground gravimetry provide operational data models that can be used in various studies in geology, tectonics, and climatology, etc. In the present study, sedimentary basins in the southern part of the East European Platform and adjoining areas including the Caucasus are studied by employing the approach based on decompensative gravity anomalies. The new model of sediments, implying their thickness and density, demonstrates several important features of the sedimentary cover, which were not or differently imaged by previous studies. We found a significant redistribution of the low-dense sediments in the Black Sea. Another principal feature is the increased thickness of relatively low-dense sediments in the Eastern Greater Caucasus. The deepest part of the South Caspian basin is shifted to the north, close to the Apsheron Trough. In its present position, it is almost joined with the Terek–Caspian depression, which depth is also increased. The thickness of sediments is significantly decreased in the eastern Pre-Caspian basin. Therefore, the new sedimentary cover model gives a more detailed description of its thickness and density, reveals new features and helps in better understanding of the evolution of the basins, providing a background for further detailed studies of the region.

Vendian rocks of the western part of the East European Platform: stratotypic range, boundaries and principles of their establishment

1986 ◽  
Vol 123 (4) ◽  
pp. 349-356 ◽  
Author(s):  
A. S. Makhnach ◽  
N. V. Veretennikov ◽  
V. I. Shkuratov
Keyword(s):  
East European Platform ◽  
Sedimentary Cover ◽  
East European ◽  
Structural Stage

AbstractThe Vendian in a stratotype area in the western part of the East European Platform includes three regional stratigraphic subdivisions: the Vilchanian, Volynian and Valdaian series, which clearly differ in structure and lithology. They are closely interconnected stratigraphically and geochronologically, and form an indivisible Late Baikalian structural stage of the platform sedimentary cover. The upper subdivision, the Valdaian Series, is palaeontologically substantiated and divided into horizons. The Vendian in such a composition has definite boundaries: the upper biostratigraphic, and lower lithostratigraphic ones, and is well correlated with the formations of the same age from other regions.

Deformations of the deep layers earth’s crust of the East-European platform

2020 ◽  
pp. 25-34
Author(s):  
V. M. Makeev ◽  
N. V. Makarova ◽  
T. V. Sukhanova
Keyword(s):  
East European Platform ◽  
Deep Structure ◽  
Earth’S Crust ◽  
Mantle Lithosphere ◽  
Near Surface ◽  
East European ◽  
Horizontal Stratification ◽  
Deep Layers ◽  
Earth's Crust ◽  
First Time

The article deals with the internal deep structure of the earth's crust of the East European platform and the surface of the mantle lithosphere. The presented charts of the three main layers of the earth's crust — the lower, middle and upper and the surface of the mantle lithosphere — for the first time identified deformation by changing the thickness of the layers. Deformations are compared on all layers that allowed to allot the active center, the main (through) and local (developed in separate layers) areas. The boundaries of these regions are active zones of different ranks. The observed end-to-end development of strain from layer to layer or expression of some of them only in separate layers indicates on the sub-horizontal stratification and vertical divisibility of the earth's crust. Deformations of the deep layers are compared with the latest near-surface platform structures. This made it possible to establish a connection of near-surface deformations with deep ones and to consider the latter as the latest. These studies are relevant for solving fundamental problems of the origin of new structures and a number of practical problems.

scholarly journals Thermal history of the East European Platform margin in Poland based on apatite and zircon low-temperature thermochronology

Solid Earth ◽  
2021 ◽  
Vol 12 (8) ◽  
pp. 1899-1930
Author(s):  
Dariusz Botor ◽  
Stanisław Mazur ◽  
Aneta A. Anczkiewicz ◽  
István Dunkl ◽  
Jan Golonka
Keyword(s):  
Low Temperature ◽  
Thermal History ◽  
East European Platform ◽  
Thermal Modelling ◽  
Thermal Maturity ◽  
Near Surface ◽  
East European ◽  
Basement Rocks ◽  
History Of ◽  
The Impact

Abstract. The Phanerozoic tectonothermal evolution of the SW slope of the East European Platform (EEP) in Poland is reconstructed by means of thermal maturity, low-temperature thermochronometry, and thermal modelling. We provide a set of new thermochronometric data and integrate stratigraphic and thermal maturity information to constrain the burial and thermal history of sediments. Apatite fission track (AFT) analysis and zircon (U-Th)/He (ZHe) thermochronology have been carried out on samples of sandstones, bentonites, diabase, and crystalline basement rocks collected from 17 boreholes located in central and NE Poland. They penetrated sedimentary cover of the EEP subdivided from the north to south into the Baltic, Podlasie, and Lublin basins. The average ZHe ages from Proterozoic basement rocks as well as Ordovician to Silurian bentonites and Cambrian to lower Carboniferous sandstones range from 848 ± 81 to 255 ± 22 Ma with a single early Permian age of 288 Ma, corresponding to cooling after a thermal event. The remaining ZHe ages represent partial reset or source ages. The AFT ages of samples are dispersed in the range of 235.8 ± 17.3 Ma (Middle Triassic) to 42.1 ± 11.1 Ma (Paleogene) providing a record of Mesozoic and Cenozoic cooling. The highest frequency of the AFT ages is in the Jurassic and Early Cretaceous prior to Alpine basin inversion. Thermal maturity results are consistent with the SW-ward increase of the Paleozoic and Mesozoic sediments thickness. An important break in a thermal maturity profile exists across the base Permian–Mesozoic unconformity. Thermal modelling showed that significant heating of Ediacaran to Carboniferous sedimentary successions occurred before the Permian with maximum paleotemperatures in the earliest and latest Carboniferous for Baltic–Podlasie and Lublin basins, respectively. The results obtained suggest an important role of early Carboniferous uplift and exhumation at the SW margin of the EEP. The SW slope of the latter was afterward overridden in the Lublin Basin by the Variscan orogenic wedge. Its tectonic loading interrupted Carboniferous uplift and caused resumption of sedimentation in the late Viséan. Consequently, a thermal history of the Lublin Basin is different from that in the Podlasie and Baltic basins but similar to other sections of the Variscan foreland, characterized by maximum burial at the end of Carboniferous. The Mesozoic thermal history was characterized by gradual cooling from peak temperatures at the transition from Triassic to Jurassic due to decreasing heat flow. Burial caused maximum paleotemperatures in the SW part of the study area, where the EEP was covered by an extensive sedimentary pile. However, further NE, due to low temperatures caused by shallow burial, the impact of fluids can be detected by vitrinite reflectance, illite/smectite, and thermochronological data. Our new results emphasize the importance of using multiple low-temperature thermochronometers and thermal modelling in connection with thermal maturity analysis to elucidate the near-surface evolution of platform margins.

scholarly journals GEODYNAMICS

GEODYNAMICS ◽  
2011 ◽  
Vol 2(11)2011 (2(11)) ◽  
pp. 89-91
Author(s):  
G. Ivanchenko ◽  
◽  
E. M. Horbunova ◽  
Keyword(s):  
East European Platform ◽  
Satellite Images ◽  
Sedimentary Cover ◽  
Crystalline Basement ◽  
Geophysical Data ◽  
East European ◽  
Neotectonic Activity ◽  
Automated Interpretation ◽  
Basement Structures ◽  
The Relationship

The relationship between the structures of the crystalline basement, structures of the sedimentary cover and relief of the day surface was traced on the basis of the geological and geophysical data and the results of visual and automated interpretation of the satellite images of the central part of East European Platform. Completed research allowed to determine the extent of the neotectonic activity of morphostructures influencing at the formation of the geophysical fields.

scholarly journals Structure and evolution of Belomorian-Severodvinsk shear zone in the Late Proterozoic and Phanerozoic, East-European Platform

2019 ◽  
pp. 62-86
Author(s):  
S. Yu. Kolodyazhny ◽  
A. S. Baluev ◽  
D. S. Zykov
Keyword(s):  
Shear Zone ◽  
East European Platform ◽  
Sedimentary Cover ◽  
Deformation Mode ◽  
Mobile Belt ◽  
Rift System ◽  
Zone Length ◽  
East European ◽  
Tension And Compression ◽  
The Baltic

Tectonics, morphological features and development stages of Belomorian-Severodvinsk shear zone (north-western part) found in the East European platform are considered. We traced the shear zone (length ≈1000 km) from NW to SE from the Baltic shield to the Russian plate sedimentary cover. It inherited Paleoproterozoic structures of Belomorian-Lapland mobile belt and Riphean grabens of the White Sea rift system. Belomorian-Severodvinsk zone was represented in the modern structure by a system of neotectonic grabens limited by normal and normal–strike sleep faults and segmented by the transform fault zones. We came to conclusion that the shear zone experienced multiple repeated activation in different dynamic conditions in the Riphean–Phanerozoic. Cyclic alternation of riftogenic trans-tension and compression or transpression conditions in the sequence stages of its development was noted. We defined three cycles of transtensive-transpressive transformations of Belomorian-Severodvinsk shear zone in the Riphean and the Early Vendian. At least four times shear zone suffered changes of deformation mode and directions of shear displacement in the Phanerozoic. The postglacial neotectonic deformations in the Belomorian-Severodvinsk shear zone revealed under the Kola block horizontal movement to the S–E and subsequent counterclockwise rotation.

scholarly journals Deep deformations of the East European platform Earth’s crust: causes and effects

2020 ◽  
Vol 2 (3) ◽  
pp. 57-69
Author(s):  
Vladimir Makeev ◽  
Nataliya Makarova
Keyword(s):  
East European Platform ◽  
Earth’S Crust ◽  
Spatial And Temporal Variability ◽  
Mantle Lithosphere ◽  
Active Centers ◽  
Near Surface ◽  
East European ◽  
Deep Layers ◽  
Earth's Crust ◽  
The Individual

The object of research is the deformation of the deep layers and the Moho surface the East European platform is identified on the basis of structural analysis thickness of the deep layers of the Earth's crust and of the Moho surface. Initial data - geological and geophysical materials of the lithosphere of the East European platform, the thickness of the lower, middle, and upper layers of the Earth's crust, and the newest structures. Research methods are structural-geodynamic and comparative- tectonic, which allow us to assess the spatial and temporal variability of deep and near-surface deformations. Results. Active centers and relatively passive deformations associated are combined into geodynamic regions, the boundaries of which are zones of structural disagreement. Geodynamic regions are divided into main and secondary. The first is expressed by stable and long-term development, the second - is shown in separate layers of the Earth’s crust. It is established that the protrusions of the mantle lithosphere cause a reduction in the thickness of the layers of the Earth's crust and the formation of the newest trough. The sinking of the mantle lithosphere affects the increase in power in the lower and upper layers and the formation of the newest uplifts. The intermediate layer is considered as a compensation layer. Thinning and thick parts of the individual layers lead to the formation of the newest local trough and uplifts. Thus, the conformal and disconform correlation of deformations of deep layers and the newest structures is a characteristic property of the structure of the platform lithosphere. The sources of deep deformations are extra-platform regional areas of recent tectogenesis and intraplatform local active centers - protrusions and trough of the mantle lithosphere, abnormal thickening and thinning of the Earth's crust layers.

scholarly journals Late Vendian kotlinian crisis on the East European Platform: lithogeochemical indicators of depositional environment

2019 ◽  
Vol 1 (1) ◽  
pp. 2-30
Author(s):  
A. V. Maslov ◽  
D. V. Grazhdankin ◽  
V. N. Podkovyrov
Keyword(s):  
Physical Properties ◽  
East European Platform ◽  
Depositional Environment ◽  
Sedimentary Basins ◽  
Cambrian Explosion ◽  
East European ◽  
Local Factors ◽  
Environmental Perturbations ◽  
Upper Vendian ◽  
Global Nature

Sharp changes in the biodiversity of fossil organisms in the Upper Vendian of the East European Platform are considered as the manifestation of global crisis immediately prior to the “Cambrian Explosion.” However, they could be caused by local environmental perturbations. Variations of some lithogeochemical indicators of depositional environment (indicators of paleoclimate, exhalation activity, redox settings, and paleobioproductivity) were analyzed in order to establish the possible influence of sedimentary systems on evolutionary processes in the Late Vendian and at the boundary with the Cambrian. The applied algorithm of lithogeochemical studies revealed no significant perturbations in physical properties of the environment on a scale of sedimentary basins. The obtained data suggest that local factors did not affect the evolution of Ediacaran biota on the East European Platform and confirm the global nature of transitions between the Redkinian, Belomorian, and Kotlinian biotas.

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