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V. E. Matiukov
Scientific Station, Russian Academy of Sciences

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Journal article
Published: 27 July 2020 in Journal of Applied Geophysics
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This paper discusses a range of issues related to the interpretation of time variations of geophysical fields as a response of the geophysical environment to lunar-solar tidal influences and seismic events under conditions of submeridional compression. A model linking the mechanism of crack formation and generation of geophysical fields has been proposed. The concept of the energy characteristics of a seismic field of deep underground (endogenous) origin along the seismic wave field observed on the Earth's surface for three mutually perpendicular components has been introduced. The results of field studies of simultaneous recording of a seismic wave field by a three-component gradient system and a magnetotelluric field at monitoring sites of the Bishkek Geodynamic Proving Ground (BGPG in Northern Tien Shan) are presented. The test area is situated in an active intracontinental mountain Central Asian Orogenic Belt with the frequent seismicity. For the experiment purposes, we select the Ukok regime monitoring point in the Kochkor basin of Kyrgyz Tien Shan. Because the location is characterized by low-level of seismic noise and the technical-and-industrial influence. The applicability of such a joint approach in geophysics is discussed. According to the results of the experiments performed, we establish a possible causal relationship between lunar-solar tides and activation of the deep underground (endogenous) source. Based on the correlation analysis of gravitational tidal effects, and the results of magnetotelluric monitoring, the azimuthal dependence of the electrical conductivity of the medium was revealed. We detect characteristic changes in the studied electromagnetic parameters, which we identify as a result of the redistribution of fluids between the fracture systems, were. The joint analysis of data from regime magnetotelluric observations and seismicity distribution confirms the high sensitivity of the method to changes in the stress-strain state of the geological environment. The confinement of seismic events to zones with high gradients of variations of apparent electrical resistivity is shown. The work may be of interest to specialists in the field of Earth Sciences, dealing with the interpretation of experimental data from geophysical test sites.

ACS Style

Anatoly Rybin; Elena Bataleva; Kseniia Nepeina; Vitalii Matiukov; Pavel Alexandrov; Pavel Kaznacheev. Response of cracking processes in variations of geophysical fields. Journal of Applied Geophysics 2020, 181, 104144 .

AMA Style

Anatoly Rybin, Elena Bataleva, Kseniia Nepeina, Vitalii Matiukov, Pavel Alexandrov, Pavel Kaznacheev. Response of cracking processes in variations of geophysical fields. Journal of Applied Geophysics. 2020; 181 ():104144.

Chicago/Turabian Style

Anatoly Rybin; Elena Bataleva; Kseniia Nepeina; Vitalii Matiukov; Pavel Alexandrov; Pavel Kaznacheev. 2020. "Response of cracking processes in variations of geophysical fields." Journal of Applied Geophysics 181, no. : 104144.

Journal article
Published: 16 September 2019 in Seismic Instruments
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For geodynamically active regions of the Earth, the task of geophysical monitoring is very urgent; geodynamic processes act on geophysical properties and fields. A successful solution to the problem of separating a magnetotelluric field into endogenic and exogenic components allows detection of the moment of fissure initiation, but so far without localization of the active area. For such localization (as a first approximation, direction finding), it is possible to monitor the seismoacoustic field, which is also associated with fissuring. The article describes the development and testing of a three-axis gradient system for recording the seismoacoustic field. Its technical support and requirements are considered in detail. The article presents the results of testing the system at fixed stationary points of the Scientific Station of the Russian Academy of Sciences in Bishkek. Such a gradient system gives grounds to separate sources by the direction to them owing to the presence of a vertical and two transverse components.

ACS Style

P. A. Kaznacheev; V. E. Matiukov; P. N. Aleksandrov; K. S. Nepeina. Development of a Three-Axis Gradient System for Seismoacoustic Data Acquisition in Geodynamically Active Regions. Seismic Instruments 2019, 55, 535 -543.

AMA Style

P. A. Kaznacheev, V. E. Matiukov, P. N. Aleksandrov, K. S. Nepeina. Development of a Three-Axis Gradient System for Seismoacoustic Data Acquisition in Geodynamically Active Regions. Seismic Instruments. 2019; 55 (5):535-543.

Chicago/Turabian Style

P. A. Kaznacheev; V. E. Matiukov; P. N. Aleksandrov; K. S. Nepeina. 2019. "Development of a Three-Axis Gradient System for Seismoacoustic Data Acquisition in Geodynamically Active Regions." Seismic Instruments 55, no. 5: 535-543.

Data descriptor
Published: 14 July 2019 in Data
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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.

ACS Style

Elena Bataleva; Anatoly Rybin; Vitalii Matiukov. System for Collecting, Processing, Visualization, and Storage of the MT-Monitoring Data. Data 2019, 4, 99 .

AMA Style

Elena Bataleva, Anatoly Rybin, Vitalii Matiukov. System for Collecting, Processing, Visualization, and Storage of the MT-Monitoring Data. Data. 2019; 4 (3):99.

Chicago/Turabian Style

Elena Bataleva; Anatoly Rybin; Vitalii Matiukov. 2019. "System for Collecting, Processing, Visualization, and Storage of the MT-Monitoring Data." Data 4, no. 3: 99.

Journal article
Published: 29 May 2014 in Geophysical Journal International
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We present the crustal resistivity structure of the Pamir and Southern Tian Shan orogenic belts at the northwestern promontory of the India–Asia collision zone. The magnetotelluric (MT) data were recorded along a roughly north–south trending, 350 km long corridor from the Pamir Plateau in southern Tajikistan across the Pamir frontal ranges, the Alai Valley and the southwestern Tian Shan to Osh in the Kyrgyz part of the Fergana Basin. In total, we measured at 178 sites, whereof 26 combine broad band and long period recordings. One of the most intriguing features of the 2-D and 3-D inversion results is a laterally extended zone of high electrical conductivity below the Pamir Plateau, with resistivities below 1 Ωm, starting at a depth of ∼10–15 km. The high conductivity can be explained with the presence of partially molten rocks at middle to lower crustal levels, possibly related to ongoing migmatization and/or middle/lower crustal flow underneath the Southern Pamir. This interpretation is consistent with a low velocity zone found from local earthquake tomography, relatively high vp/vs ratios, elevated surface heat flow, and thermomechanical modelling suggesting that melting temperatures are reached in the felsic middle crust. In the upper crust of the Pamir and Tian Shan, the Palaeozoic–Mesozoic suture zones appear as electrically conductive, whereas the compact metamorphic rocks of the Muskol-Shatput Dome of the Central Pamir are highly resistive. The intra-montane basin of the Alai Valley—sandwiched between the Pamir and Tian Shan—exhibits a generally conductive upper crust that bifurcates into two conductors at depth. One of them connects to the active Main Pamir Thrust, which is absorbing most of today's convergence between the Pamir and the Tian Shan. Several deeper zones of high conductivity in the middle and lower crust of Central and Northern Pamir likely record fluid release due to metamorphism associated with active continental subduction/delamination.

ACS Style

P. Sass; O. Ritter; Lothar Ratschbacher; J. Tympel; Vitalii Matiukov; A. K. Rybin; V. Yu. Batalev. Resistivity structure underneath the Pamir and Southern Tian Shan. Geophysical Journal International 2014, 198, 564 -579.

AMA Style

P. Sass, O. Ritter, Lothar Ratschbacher, J. Tympel, Vitalii Matiukov, A. K. Rybin, V. Yu. Batalev. Resistivity structure underneath the Pamir and Southern Tian Shan. Geophysical Journal International. 2014; 198 (1):564-579.

Chicago/Turabian Style

P. Sass; O. Ritter; Lothar Ratschbacher; J. Tympel; Vitalii Matiukov; A. K. Rybin; V. Yu. Batalev. 2014. "Resistivity structure underneath the Pamir and Southern Tian Shan." Geophysical Journal International 198, no. 1: 564-579.