scholarly journals Features of the Tien Shan newest orogen morphostructure

LITOSFERA ◽  
2021 ◽  
Vol 21 (6) ◽  
pp. 747-774
Author(s):  
M. G. Leonov ◽  
E. S. Przhiyalgovskii ◽  
A. K. Rybin ◽  
G. G. Shchelochkov
Keyword(s):  
Reference Points ◽  
Tien Shan ◽  
Earth’S Crust ◽  
Linear Wave ◽  
Tectonic Structure ◽  
Centrally Symmetric ◽  
Earth's Crust ◽  
Concentrated Deformation ◽  
Granite Basement ◽  
Symmetric Structures

Research subject. The concept of morphostructure implies the presence of a relationship between the relief forms of segments of the Earth’s crust and their structural and material content. This article describes the geological ensembles of the Tien Shan orogen, the tectonic structure and modern relief of which differ in their parameters from the general morphostructural plan and which, therefore, belong to the category of morphostructural anomalies. Materials and methods. The data presented in the article were obtained in the course of field structural-geological and morphostructural study of key segments of the Tien Shan orogen, as well as an analysis of materials from previous research, including the results of geophysical sounding of the Earth’s crust and geodesical monitoring of relative modern movements of reference points on the surface.Results. The article demonstrates that, against the background of the general linear-wave morphostructure of the Tien Shan orogen, there are areas whose relief and tectonic structure do not agree with the general tectonic plan of the mountain. Wi thin the considered region, different types of morphostructural anomalies are identified and described, reflecting the speci fics of the evolution and geotectonic position of individual volumes of upper-crust rock complexes: zones of concentrated deformation and tectonic joining; centrally symmetric structures formed on the site of paleoatolls; neotectonic protrusions  of the granite basement; trans-regional zone of the Talaso-Ferghana Fault and other structures. Conclusion. The formation of morphostructural anomalies is associated with the presence of non-trivial geodynamic environments operating against the background of the tectonic regime common to the Tien Shan. The modern morphostructure of the Tien Shan is the result of interference between various geodynamic regimes and settings: a regime common to the entire territory of the orogen and particular regimes that manifest themselves sporadically and are reflected in the modern relief.

scholarly journals System for Collecting, Processing, Visualization, and Storage of the MT-Monitoring Data

Data ◽  
2019 ◽  
Vol 4 (3) ◽  
pp. 99 ◽  
Author(s):  
Elena Bataleva ◽  
Anatoly Rybin ◽  
Vitalii Matiukov
Keyword(s):  
Practical Importance ◽  
Active Regions ◽  
Tien Shan ◽  
Earth’S Crust ◽  
Management Tool ◽  
Research Station ◽  
Depth Range ◽  
Integrated Monitoring ◽  
Geodynamic Processes ◽  
Earth's Crust

On the basis of the Research Station of the Russian Academy of Sciences in Bishkek, a unique scientific infrastructure—a complex geophysical station—is successfully functioning, realizing a monitoring of geodynamic processes, which includes research on the network of points of seismological, geodesic, and electromagnetic observations on the territory of the Bishkek Geodynamic Proving Ground located in the seismically active zone of the Northern Tien Shan. The scientific and practical importance of monitoring the geodynamical activity of the Earth’s crust takes place not only in seismically active regions, but also in the areas of the location of particularly important objects, mining, and hazardous industries. Therefore, it seems highly relevant to create new software and hardware to study geodynamic processes in the earth’s crust of seismically active zones, based on integrated monitoring of the geological environment in the widest possible depth range. The use of modern information technology in such studies provides an effective data management tool. The considering system for collecting, processing, and storing monitoring electromagnetic data of the Bishkek geodynamic proving ground can help overcome the scarcity of experimental data in the field of Earth sciences.

scholarly journals Analysis of the features of the spatio-temporal distribution of geoelectric inhomogeneities in the Earth’s crust and seismic events

2021 ◽  
Vol 254 ◽  
pp. 02003
Author(s):  
Elena Bataleva
Keyword(s):  
Temporal Distribution ◽  
Physical Nature ◽  
Tien Shan ◽  
Earth’S Crust ◽  
Seismic Events ◽  
Magnetotelluric Data ◽  
Geological Conditions ◽  
Spatio Temporal ◽  
Earth's Crust ◽  
The Relationship

The paper presents the results of experiments carried out at the regime points of magnetotelluric monitoring both on the territory of the Bishkek geodynamic test site (Northern Tien Shan) and on a series of monitoring profiles in various geological conditions. Previous studies indicate the relationship of variations in the electromagnetic and seismic fields, lunisolar tidal effects, seismic regime with the processes of fracturing. The purpose of this work is to establish the features of the relationship between the spatio-temporal distribution of seismicity and the distribution of geoelectric inhomogeneities in the Earth’s crust (fault-block tectonics of the region). Based on the analysis of the results of the interpretation of magnetotelluric data (2D inversion) and new detailed seismotomographic constructions, the verification of geoelectric models was carried out, the analysis of the distribution of hypocenters of seismic events was carried out. Special attention was paid to the confinement of earthquakes to listric fault structures. The relationship between the distribution of the hypocenters of seismic events and the spatial position of the electrical conductivity anomalies is confirmed by the authors explanation of the physical nature of the identified conducting structures, based on hypotheses of fluidization and partial melt of the Earth’s crust.

scholarly journals Stress-strain state of the earth’s crust of the Central Asian mountain belt: distant effect of the tectonic impact of the Indo-Eurasian collision

2021 ◽  
Vol 929 (1) ◽  
pp. 012003
Author(s):  
M M Buslov
Keyword(s):  
Central Asia ◽  
Sedimentary Basins ◽  
Tien Shan ◽  
Earth’S Crust ◽  
High Mountain ◽  
Mountain Ranges ◽  
Central Asian ◽  
Sayan Region ◽  
Earth's Crust ◽  
Cenozoic Sediments

Abstract In recent decades, extensive geological, geophysical and geochronological data have been obtained that characterize in detail the results of the distant tectonic impact of the Indo-Eurasian collision on the lithosphere of Central Asia, which led to the formation of the mountain systems of the Pamirs, Tien Shan, Altai-Sayan region and Transbaikalia from the Late Paleogene (about 25 million years ago). It has been established that the formation of the structure of Central Asia occurred as a result of the transmission of deformations from the Indo-Eurasian collision over long distances according to the “domino principle” through the rigid structures of Precambrian microcontinents located among the Paleozoic-Mesozoic folded belts. The study of peneplain surfaces deformed into simple folds on high-mountain plateaus surrounded by rugged mountain ranges made it possible to reveal the parameters of the deformations of the earth’s crust, the interrelationship of the formation of relief and sedimentary basins. Apatite track dating data, structural and stratigraphic analyses of Late Cenozoic sediments in the basins prove a period of intense tectonic activation the entire lithosphere of Central Asia from the Indian continent to the Siberian platform starting from the Pliocene (about 3.5 million years). As a result of reactivation of the heterogeneous basement of Central Asia, high seismicity was manifested, which is concentrated mainly along the border of the microcontinents (Central Tianshan, Junggar and Tuva-Mongolian) and the Siberian craton, as well as in the zones of articulation of regional faults.

scholarly journals The Reference System in Determining the Parameters of Horizontal Deformations of the Earth's Crust on Geodynamic Polygons

2019 ◽  
Vol 8 (2S11) ◽  
pp. 3867-3871
Keyword(s):  
Initial Data ◽  
Reference System ◽  
Related Problem ◽  
Physical Nature ◽  
Theory Of Elasticity ◽  
Reference Points ◽  
Earth’S Crust ◽  
Measuring Instruments ◽  
Data Errors ◽  
Earth's Crust

The article is devoted to the choice of the reference system and the related problem of initial data errors while determining the features of the earth's crustal deformations, determined at the geodynamic polygons (GDP) by the differences of the equalized coordinates of network points between the geodetic measurements epochs. It is shown that the problem is not eliminated in the transition to satellite measuring instruments. In determining the geometric component of the earth's crust deformations, it is recommended to take into account the physical nature of its origin. To ensure the uniformity of the reference system for all geodesic measurements epochs on the local GDPs it is recommended to use the free geodetic networks equalization device without reference points. The deformation components obtained according to the theory of elasticity should be recognized the priority features of the earth's crust deformations on such GDPs.

Deformation of the Earth’s crust in the Northern Tien Shan according to the earthquake focal data and satellite geodesy

2010 ◽  
Vol 46 (3) ◽  
pp. 230-243 ◽  
Author(s):  
A. D. Kostyuk ◽  
N. A. Sycheva ◽  
S. L. Yunga ◽  
L. M. Bogomolov ◽  
Y. Yagi
Keyword(s):  
Tien Shan ◽  
Satellite Geodesy ◽  
Earth’S Crust ◽  
Earth's Crust ◽  
Northern Tien Shan

Regularities of the deformations of the earth's crust at the joint of the Pamirs and Tien-Shan

1975 ◽  
Vol 29 (1-4) ◽  
pp. 429-438 ◽  
Author(s):  
A.K. Pevnev ◽  
T.V. Guseva ◽  
N.N. Odinev ◽  
G.V. Saprykin
Keyword(s):  
Tien Shan ◽  
Earth’S Crust ◽  
Earth's Crust
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