scholarly journals THE CAUSE OF HIGH INTENSITY OF SEISMICITY IN UKRAINE

2018 ◽  
pp. 38-45
Author(s):  
O. Chalyi ◽  
M. Diaconescu ◽  
I. Gurova ◽  
Y. Lisovyi ◽  
P. Pigylevsky ◽  
...  
Keyword(s):  
High Intensity ◽  
Local Stress ◽  
Suture Zone ◽  
Earth’S Crust ◽  
Donets Basin ◽  
Sharp Change ◽  
Earthquake Focus ◽  
Northern Side ◽  
Structural Plan ◽  
Earth's Crust

In the article, the earthquake near Sumy is considered in detail. According to the authors, this earthquake occurred under the influence of several stress regimes. At the regional level: it is related to the transfer of stresses from the Vrancea zone along the mantle lineament of Sollogub; a change in the local stress field, which is created by blocks with different thicknesses of the earth's crust, with the presence of subcrustal thermal anomalies. The area of the location of the earthquake focus near the town of Sumy in tectonic terms is on the southwestern slope of the Voronezh crystalline massif near the northeastern side of the Dnieper-Donets Basin (DDB). The epicenter is confined to the northern extension of the Krivyy-Rig-Kremenchug suture zone. The earthquake focus is confined to the tectonic node formed by the eastern edge fault of the Krivyy-Rig-Kremenchug suture zone and the northern side fracture of the DDB. The main deep faults near the source of the earthquake are the northern side fault of the DDB rift and the northern extension of the Krivyy Rig-Kremenchug fault. The hypocenter of the event is in the area with sharp change in the structural plan of the Moho surface accompanied by a negative mantle gravitational anomaly. In the relief of the Moho surface, a superimposition of the structural plan of the northwestern direction, connected with the Devonian rift of the DDV, on the ancient structural plan of the Ukrainian shield and Voronezh crystalline massive is clearly visible. Within the DDV, the isohypses of the Moho surface clearly delineate the ascent to ~ 35 km in the central part of the rift. The Krivyy-Rig-Kremenchug suture zone is expressed in the Moho surface by a narrow elongated depression with depths of more than 50 km in the central part. Here, in the lower part of the cortex, the development of the crust-mantle mixture is observed. The Krivyy-Rig-Kremenchug suture zone is also distinguished by the development of high-intensity deep magnetic inhomogeneities along it. In addition, here in the lower part of the crust and in the upper mantle a linear object of high electrical conductivity is isolated. Thus, the earth's crust of the region has a pronounced physic-geological heterogeneity, which creates instability of lithostatic stress, and this, in turn, is a prerequisite for the appearance of additional stresses.

scholarly journals DETERMINING THE SIGN OF Δ31 AT LONG BASELINE NEUTRINO EXPERIMENTS

2001 ◽  
Vol 16 (29) ◽  
pp. 1881-1886
Author(s):  
MOHAN NARAYAN ◽  
S. UMA SANKAR
Keyword(s):  
High Intensity ◽  
Low Energy ◽  
Earth’S Crust ◽  
Mixing Angle ◽  
Background Ratio ◽  
Matter Effects ◽  
Long Baseline ◽  
Earth's Crust ◽  
Neutrino Experiments

Recently it is advocated that high intensity and low energy (Eν~2 GeV ) neutrino beams should be built to probe the (13) mixing angle ϕ to a level of a few parts in 104. Experiments using such beams will have better signal-to-background ratio in searches for νμ→νe oscillations. We propose that such experiments can also determine the sign of Δ31 even if the beam consists of neutrinos only. By measuring the νμ→νe transitions in two different energy ranges, the effects due to propagation of neutrinos through earth's crust can be isolated and the sign of Δ31 can be determined. If the sensitivity of an experiment to ϕ is ε, then the same experiment is automatically sensitive to matter effects and the sign of Δ31 for values of ϕ≥2ε.

scholarly journals Density inhomogeneity of the earth's crust along the latitudinal zones of the faults of the Ukrainian shield and the Dnieper-Donets basin

2012 ◽  
Vol 34 (6) ◽  
pp. 113-132
Author(s):  
V. I. Starostenko ◽  
P. Ya. Kuprienko ◽  
I. B. Makarenko ◽  
O.V. Legostaeva ◽  
A.S. Savchenko
Keyword(s):  
Earth’S Crust ◽  
Ukrainian Shield ◽  
Donets Basin ◽  
Density Inhomogeneity ◽  
Earth's Crust

scholarly journals The Quantum Mechanism of Earthquakes as Exemplified by a Sudden Ejection of Rocks and Gas from a Rock Mass during the Process of a Coulomb Explosion

2020 ◽  
Author(s):  
Serguei Bychkov
Keyword(s):  
Rock Mass ◽  
Classical Mechanics ◽  
Coulomb Explosion ◽  
Point Of View ◽  
Earth’S Crust ◽  
Sharp Change ◽  
Quantum Processes ◽  
Quantum Version ◽  
Earth's Crust ◽  
The Moment

Abstract At the moment, there are several hypotheses in geophysics that explain especially dangerous processes of the earth's crust movements - sudden outbursts of rocks and gas from a rock mass from the point of view of classical physics. Despite the fact that various macroscopic systems can be accurately described using classical mechanics and electrodynamics, a real mechanism and a working model of this phenomenon cannot be built. Consequently, to develop a model of sudden outbursts of rocks and gas, it is necessary to apply new approaches and methods, different from the description of macroscopic systems. This article describes a quantum version of the process of the ejection of rocks from a rock mass. In particular, we described the mechanism of the Coulomb explosion that occurs in the rocks of the earth's crust with a sharp change in rock pressure and built a model of the sudden release of rocks and gases. In our opinion, the quantum processes described by us can be sources not only of sudden outbursts and rockslide but also sources of more formidable phenomena - earthquakes and volcanic explosions.

scholarly journals International cooperation of S. I. Subbotin Institute Geophysics, NAS of Ukraine for 2010—2020

2021 ◽  
Vol 43 (3) ◽  
pp. 205-226
Author(s):  
V. I. Starostenko ◽  
O. M. Rusakov ◽  
A. I. Yakimchik
Keyword(s):  
Antarctic Peninsula ◽  
Age Distribution ◽  
Earth’S Crust ◽  
Ukrainian Shield ◽  
Donets Basin ◽  
Mutual Position ◽  
Crust And Upper Mantle ◽  
Eastern Carpathians ◽  
Earth's Crust ◽  
The Antarctic

The geological structure of the lithosphere of the main tectonic structures has been refined for the territory of Ukraine and adjacent regions of Slovakia, Poland, Romania, Russia, as well as Bulgaria, the Antarctic Peninsula (West Antarctica) and Southeast Asia, and new data have been obtained on geophysical impacts that can affect the environment. A geodynamic scenario has been developed for the formation of large-scale folding of the Fore- Dobrudzja Trough, the South Ukrainian monocline and the Ingul block of the Ukrainian Shield, caused by tectonic events associated with the closing of the Paleotethys and Neotethys oceans in the Mesozoic. In the Pripyat-Dnieper-Donets Basin, the structure of the earth’s crust and upper mantle can reflect different intensities of rifting, from its passive stage in the Dnieper Graben to active rifting in the Pripyat Trough. An analysis of the geoelectric structure of the Earth’s crust in the Ukrainian Eastern Carpathians indicates that seismic events occur mainly in resistive solid rock domainswhich surrounded by aseismic high conductive zones consisting of at least partially melted material. The present-day mutual position of the Ukrainian shield and Fennoscandia stabilized 1720—1660 Ma. The age, distribution, orientation and composition have been studied for the LatePalaeoproterozoicdykes in the Volyn, Ingul and Azov blocks of the Ukrainian Shield. Eastern Crimea and the Sorokin Trough are fragments of a tectonic wedge formed after the Paleocene. The geothermal conditions of the Intra-Carpathian region are due to subduction during the closure of the Pannonian sea basin and the collisional interaction of the Eurasian plate with the microplates system of this region. In Bulgaria, most earthquakes occur outside high-resistive domains. The tectonic stages are reconstructed for the formation of the northern part of the Antarctic Peninsula in the Mesozoic-Cenozoic. The relationship has been established between the geomagnetic field and climate change, with it being different for the Northern and Southern Hemispheres. The results have been obtained within the framework of 25 international projects and 6 temporary international target teams of S. I. Subbotin Institute of Geophysics, NAS of Ukraine consisting of researchers from 23 countries. The results are presented in 53 publications, 38 of which are indexed in the Web of Scienct database, and 32 papers are published in 20 international journals and special publications of 10 countries with different impact factors (from 0,101 to 4,214), whose average impact factor is 3,341, and the total one is 66,815.

scholarly journals RELATION OF THE MORPHOSTRUCTURE OF THE CREST POSITION OF THE VORONEZH ANTECLISE WITH THE DEEP INHOMOGENEITIES OF THE LITHOSPHERE

2017 ◽  
pp. 13-19
Author(s):  
I. T. Ezhova ◽  
L. I. Nadezhka ◽  
A. I. Tregub
Keyword(s):  
Structural Material ◽  
Spatial Correlation ◽  
Spatial Location ◽  
High Density ◽  
Earth’S Crust ◽  
Voronezh Anteclise ◽  
Density Values ◽  
Structural Plan ◽  
Earth's Crust ◽  
Reduced Density

The morphostructure of an crest part of the Voronezh anteclise is closely related to the neotectonics of the territory. A feature of the newest structure, in contrast to the Paleozoic, Mesozoic and Paleogene structures, is predominantly the submeridional orientation of the interchanging raised and downdip blocks. The following regularities of the degree of the reflection of the deep inhomogeneities in neotectonic and geomorphological characteristics have been revealed. The zones of the reduced density at the top of the mantle have been noted to be corresponded in general by neotectonic blocks with the elevated relief. Areas of the high density values in a number of cases are corresponded by the Neogene-Quaternary blocks of the second rank with the reduced values of relief depth marks. Both of the relationships of the thickness of the earth’s crust and the height of the relief, negative and straight, have been observed. A complete spatial correlation between these parameters has been not observed, but on the whole, the structural plan of the Neogene-Quaternary structural-material complex is consistent with the spatial location of large heterogeneities in the litho sphere.

Three-dimensional Earth’s crust density model of the central part of the Golovanevsk suture zone of the Ukrainian Shield

2018 ◽  
Vol 40 (3) ◽  
pp. 27-53
Author(s):  
V. I. Starostenko ◽  
P. Ya. Kuprienko ◽  
I. B. Makarenko ◽  
A. S. Savchenko ◽  
O. V. Legostaeva
Keyword(s):  
Three Dimensional ◽  
Suture Zone ◽  
Earth’S Crust ◽  
Ukrainian Shield ◽  
Density Model ◽  
Earth's Crust

scholarly journals Density heterogeneity of the Earth’s crust of Ukraine and adjacent territories from three-dimensional gravity modelling

2021 ◽  
Vol 43 (2) ◽  
pp. 45-95
Author(s):  
I.B. Makarenko
Keyword(s):  
Black Sea ◽  
Lower Layer ◽  
Three Dimensional ◽  
Earth’S Crust ◽  
Gravity Models ◽  
Donets Basin ◽  
The Black Sea ◽  
Software Complex ◽  
Earth's Crust ◽  
First Time

The work was performed to study the density heterogeneity of the crust of Ukraine and adjacent regions analyzing detailed 3D gravity models of the following tectonic regions and separate structures: Dnieper-Donets Basin and Donbas, Ingulsky megablock, Golovanivska suture zone, latitudinal zones of fractures of the Ukrainian Shield, Black Sea megadepression and surrounding areas. The models are constructed on the basis of geological, petrophysical and seismic data along geotravers, DSS profiles, the modern WARR methodsand are calculated using the automated software complex for interpretation of potential fields GMT-Auto. As a result, new information was obtained for the density distribution in the whole Earth’s crust.The density distributions construct for the entire crust of Ukraine and adjacent regions at certain depths (surface of the basement, 10, 20, 30 km, Moho discontinuity). The thickness was determined for conditionally distinguished «granite», «diorite», «basalt» layers of the Earth’s crust and crust-mantle mixture within the whole region of the study. Its values are graphically represented by isolines on the respective schematical maps. The resulting density inhomogeneity became the basis for constructing, for the first time in a three-dimensional version, a scheme for the predictive composition of the Earth’s crust with typification according to the power ratios of its constituent layers. The heterogeneity of the present-day consolidated crust of the whole study area is characterized by granitic, granitic-dioritic, dioritic and basaltoid types. To clearly identify the dismemberment of the lower layer of the crust which is considered inseparable by the classification of the DSS method the basaltoid type is divided into 3 subtypes. The subtype 1 with a content of 40—70 % of basalt, subtype 2, where concent-ration of basalt increases to 70—90 % and subtype 3, which is composed only of basalt.It has been established that the basicity of the Earth’s crust of the USh changes from west to east, respectively, from basalt to diorite type. Decrease in crustal basicity is also observed in suture zones, namely from diorite and basaltoid typein Golovanivskii suture to basaltoid and diorite type in the Inguletsko-Kryvorizckii suture and diorite type in the Orikhivsko-Pavlogradskii suture. In the DDB the crustal basicity increases from northwest to southeast in accordance with the segmentation of this feature. The basaltoid type of the crust is predominant in the Black Sea megadepression and adjacent territories. For the first time, a type of crust was identified that does not coincide with the known ones and is characterized by the presence in the section of the «basalt» and «granite» layers (with a zero or very low «diorite» thickness). A similar type of bark is present in the Ingul megablock of the USh, in the northern side zone of the DDB, as well as in the Black Sea megadepression.

Tides in the Earth's Crust

1915 ◽  
Vol 79 (2058supp) ◽  
pp. 382-383
Author(s):  
Alphonse Berget
Keyword(s):  
Earth’S Crust ◽  
Earth's Crust
Sign in / Sign up

Export Citation Format

Share Document