A. Gorbatikov - Academia.edu (original) (raw)

Papers by A. Gorbatikov

Research paper thumbnail of Microseismic Sounding in the Oil & Gas Complex Objects Control Problems

66th EAGE Conference & Exhibition, 2004

Research paper thumbnail of Natural Hazards and Earth System Sciences Geophysical Observatory in Kamchatka region for monitoring of

Abstract. Regular monitoring of some geophysical parameters in association with seismicity has be... more Abstract. Regular monitoring of some geophysical parameters in association with seismicity has been carried out since last year at the Japan-Russian Complex Geophysical Observatory in the Kamchatka region. This observatory was organized in connection with the ISTC project in Russia and was motivated by the results of the FRONTIER/RIKEN and FRONTIER/NASDA research projects in Japan. The main purpose of the observations is to investigate the electromagnetic and acoustic phenomena induced by the lithosphere processes (especially by seismic activity). The seismicity of the Kamchatka area is analyzed and a description of the observatory equipment is presented. At present, the activity of the observatory includes the seismic (frequency range �F = 0.5 − 40 Hz) and meteorological recordings, together with seismo-acoustic (�F = 30 − 1000 Hz) and electromagnetic

Research paper thumbnail of Recherche De Signes Precurseurs De Tremblements De Terre en Moldavie

LA MONOGRAPHIE EST CONSACREE A L'ORGANISATION D'OBSERVATIONS PERMETTANT DE PREVOIR DES PH... more LA MONOGRAPHIE EST CONSACREE A L'ORGANISATION D'OBSERVATIONS PERMETTANT DE PREVOIR DES PHENOMENES SISMIQUES EN MOLDAVIE. ON PRESENTE DES DONNEES CONCERNANT LE SYSTEME D'OBSERVATION. ON DONNE UN BREF APERCU DE LA SISMICITE DU PAYS. ON DECRIT UN SYSTEME AUTOMATIQUE DE COLLECTE, DE STOCKAGE ET DE TRAITEMENT DES DONNEES GEOLOGIQUES ET PHYSIQUES. ON DISCUTE DES PROBLEMES METHODOLOGIQUES D'ANALYSES DE SERIES TEMPORELLES OBTENUES LORS D'OBSERVATIONS FAITES POUR PREVOIR DES PHENOMENES SISMIQUES. ON MONTRE, DANS LE CHAPITRE CONSACRE A CES OBSERVATIONS, QU'IL EST POSSIBLE DE SE SERVIR DE METHODES STATISTIQUES POUR METTRE EN EVIDENCE DES SIGNES PRECURSEURS A LONG TERME DE TREMBLEMENTS DE TERRE. (INV. 19867 - GMS1 - M.MAGNAN).

Research paper thumbnail of A Complexity of the Displacement Along Segments of the Akhtyirskiy Fault

Emergence, Complexity and Computation, 2014

A distinctive features of the Ahtyirskiy fault (Krasnodar, Russia) are its long length and the un... more A distinctive features of the Ahtyirskiy fault (Krasnodar, Russia) are its long length and the unusual geological structure. The fault demarcates the boundary between highlands and flat landform. To study the fault displacement we have applied two methods. The first structural–geo-morphological method reconstructs orientation of the compression/expansion axis in a horizontal plane and thus determines the direction of a horizontal displacement along the fault. In this study the method has been modified by analyzing of individual segments of the Ahtyirskiy fault. Another method is the microseismic sounding that determines a distribution of surface wave characteristics in a vertical plane. We conclude that the displacement along the fault has average direction, which we call the upthrust right-shift. However there are segments that are deformed in a special manner and displacements along them can not be explained via theoretical models. Mainly the fault plane falls to the south direction while its individual parts fall to the north.

Research paper thumbnail of Структура и современная геодинамика мегантиклинория Большого Кавказа в свете новых данных о глубинном строении

Геотектоника, 2015

С помощью технологии микросейсмического зондирования (ММЗ) были составлены глубинные разрезы вдол... more С помощью технологии микросейсмического зондирования (ММЗ) были составлены глубинные разрезы вдоль двух профилей, пересекающих центральную часть Большого Кавказа в Осетии и северо-западную – в районе г. Туапсе. Выявленные неоднородности литосферы обнаруживают тесную связь с тектоническими деформациями орогенного этапа и молодым вулканизмом. Вдоль профиля в Осетинском секторе Большого Кавказа установлено наличие трех характерных по свойствам и морфологии глубинных объемов в земной коре под горной системой. А именно, наличие субвертикального низкоскоростного объема и двух обрамляющих его с севера и юга субвертикальных высокоскоростных объемов. Низкоскоростной объем расположен в основном под осевой частью мегантиклинория Большого Кавказа, а высокоскоростные – под южным и северным крыльями. Практически под всей структурой ядра складчатого сооружения на глубине примерно 10 км прослеживается выдержанная горизонтальная кровля низкоскоростного тела. В Туапсинском секторе, вблизи западной периклинали мегантиклинория, контрастность низкоскоростного тела существенно меньше. Там наиболее контрастные, узкие низкоскоростные тела приурочены к границе Предкавказского (Западно-Кубанского) прогиба с горным сооружением и с Адыгейским выступом.

Research paper thumbnail of Use of Seismic Methods for Study the Reasons of Building Construction Damage

61st EAGE Conference and Exhibition, 1999

Research paper thumbnail of Imaging the Volcanic Structures Beneath Gran Canaria Island Using New Gravity Data

Journal of Geophysical Research: Solid Earth

From a new gravity data set that covers homogeneously the whole surface of Gran Canaria (Canary I... more From a new gravity data set that covers homogeneously the whole surface of Gran Canaria (Canary Islands, Spain) and marine gravity data in the nearest offshore, we have obtained a Bouguer anomaly gravity map of the island which improves the previous ones. Using these gravity anomalies, we have applied a gravity inversion approach to investigate the structures beneath the surface of Gran Canaria Island and derive a 3D gravity sources model. The geometry of structures with anomalous density values is constrained up to a depth of approximately 20,000 m below the sea level. The interpretation of the density model identified structures related to the different volcanic stages of Gran Canaria. Several deep‐rooted high‐density structures represent the intrusive bodies emplaced in the early formation of Gran Canaria and the magma plumbing system of the Miocene volcanic edifices. A low‐density body in the center of the island may be associated with the syenitic core of the felsic central vol...

Research paper thumbnail of Features of the deep structure of some volcanic islands of the Canary Archipelago from the passive seismo-prospecting method

Trabajo presentado en el 26o UGG General Assembly, celebrado en Praga (Republica Checa) del 22 de... more Trabajo presentado en el 26o UGG General Assembly, celebrado en Praga (Republica Checa) del 22 de junio al 2 de julio.

Research paper thumbnail of Development of the model of El Hierro island (Canary Islands) on a basis of complementary interpretation the results of low-frequency microseismic sounding and gravimetric survey

Research paper thumbnail of Contemporary State of the Elbrus Volcanic Center (The Northern Caucasus)

Pure and Applied Geophysics, 2017

The Elbrus volcanic center is located in southern Russia on the northern slope of the main ridge ... more The Elbrus volcanic center is located in southern Russia on the northern slope of the main ridge of the Greater Caucasus. Current classifications define Elbrus as a dormant volcano that could become active even after millennia of quiescence. In this study, we use two new geophysical methods to assess the contemporary state of the Elbrus volcano. The first method is based on an evaluation of parameters of resonant modes ''reemitted'' by the resonant structure (i.e., volcanic chamber) in response to the excitation of a seismic impact and recorded by a precise laser interferometer-strainmeter. The second method is based on lowfrequency microseismic sounding and allows determination of the deep structure of complicated geological objects. Our study locates the magma chamber at depths of 1-8 km and extended magma source at depths of 15-40 km beneath the Elbrus eastern summit. An unknown magmatic structure, comparable to the Elbrus magmatic structure but currently much colder, was also identified 50 km from Mt. Elbrus. Based on our analysis, we assess the Elbrus volcano to be currently in a quasi-stable state of thermodynamic equilibrium.

Research paper thumbnail of A laser deformometer applied to seismic detector metrological characteristics

Measurement Techniques, 1993

A set of standard equipments is considered for reproducing seismic oscillation parameters that ha... more A set of standard equipments is considered for reproducing seismic oscillation parameters that have been developed at the Mendeleev All-Union Metrology Research Institute.

Research paper thumbnail of Examples of Practical Testing of the Method of Microseismic Sensing in the Interests of Studying, Exploration and Development of Hydrocarbon Deposits

New Challenges in Fundamental and Applied Petroleum Geology: Conference Proceedings, 2021

Research paper thumbnail of The microseismic sounding method: Application for the study of the buried diatreme structure

Doklady Earth Sciences, 2009

Research paper thumbnail of Deep Structure of the Northwestern Termination of the Caucasus from New Geological and Geophysical Data

Izvestiya, Physics of the Solid Earth, 2020

Abstract—In 2014–2019, integrated geological and geophysical studies were carried out in the larg... more Abstract—In 2014–2019, integrated geological and geophysical studies were carried out in the largest flexural-rupture and fold-and-fault zones of the Northwest Caucasus (the Anapa, Akhtyr, Moldavanovka, Karabetov, Fanagoria and Azov anticlinal ridges and the Pshekha–Adler, Kerch–Tuzla, and Kerch Strait faults). Microseismic sounding method (MSM) was the main geophysical approach. The MSM studies identified the deep structural features of the Earth’s crust in the study region and made it possible to correlate them with the specific tectonic structures on the surface. The correlation was established by reconciling the results of the MSM studies, the parameters of sedimentary cover section, and crustal discontinuities revealed by drilling and previous studies of the converted waves from the earthquakes. It is found out that the Anapa flexure and longitudinal tectonic zones have the distinct deep roots beneath them. The trans-Caucasian Anapa flexural-rupture zone separates the pericline...

Research paper thumbnail of Deep and shallow structure model of Gran Canaria using mircoseismic sounding and gravity inversion

Research paper thumbnail of Influence of the Contribution of Body Waves to the Result of the Microseismic Sounding Method

Acoustical Physics, 2020

The article presents a numerical study of the formation of the amplitude response in a free surfa... more The article presents a numerical study of the formation of the amplitude response in a free surface from simultaneous scattering of Rayleigh waves and vertically incident longitudinal waves by an embedded contrast velocity inclusion. It has been established that the significant presence of body waves in a microseismic field does not fundamentally change the result of the microseismic sounding method, which is based on the notion of the overwhelming contribution of the fundamental mode of a Rayleigh wave to the formation of the Earth's microseismic field. Cases are considered when a microseismic signal at the same frequency is modeled only by the fundamental mode of the Rayleigh wave, only by a vertically incident longitudinal wave, and by both types of waves simultaneously. Variants of inhomogeneities with different dimensions and velocity properties are considered. The analysis was performed in a (λ, r)-space, in analogy with reconstruction of the structure of the geological setting in the microseismic sounding method, where λ is the wavelength of the fundamental Rayleigh mode and r is the coordinate on the Earth's surface.

Research paper thumbnail of Deep Structure, Volcanic and Seismic Activity Regime in Elbrus Region

Geotectonics, 2018

According to obtained results of profiling by microseismic sounding method along the line in subm... more According to obtained results of profiling by microseismic sounding method along the line in submeridional direction crossing the eastern cone of the Elbrus volcano and a magmatic chamber was found under the Elbrus volcano in the range of depths of 7-13 km below sea level with horizontal size of ≈ 7 km. At the depths of 18-40 km, a narrow linear magmatic focus steeply dipping in the southern direction is deduced, its horizontal size in the cross section is ≈5 km underlain by another magmatic focus at the depths of 45-55 km, penetrating the upper mantle. The found magmatic chamber and earthquake center in the crust section are formed by isometric and linear low-velocity bodies. The sections of two profiles show deep faults correlated with morphological features revealed on the surface. To the south of Tyrnyauz town at the depths of 17-40 km below sea level, a low-speed steeply sinking in the northern direction linear body was found and interpreted as cool volcanic channel approximately at the size of Elbrus. Having carried out geophysical research we obtained data on 7 ancient earthquakes with magnitude M = 6.5-7.0 occurred over past 7000 years in the vicinity of the volcano. In that historic period five strong eruptions of Elbrus volcano had happened. We settled the absence of time commonality in activations of volcanism and seismicity. Currently Elbrus volcano is in a phase of deep seismic abate. In 2004-2017 we have fulfilled geological, geophysical and paleoseismological research that confirms Elbrus is not completely extinct volcano.

Research paper thumbnail of Deep structure of the Anapa flexural-rupture zone, Western Caucasus

Геотектоника, 2019

In the period from 2007 to 2017 complex geological and geophysical studies were carried out in th... more In the period from 2007 to 2017 complex geological and geophysical studies were carried out in the three largest flexural-rupture fault zones in the North-West Caucasus (Anapa, Akhtyrka and Moldavan). The micro-seismic sounding (MSM) was used as the main geophysical method. Studies with the help of MSM allowed us to identify the features of the deep structure of the earth’s crust in the study area and to associate them with specific tectonic structures on the surface.The binding was carried out by harmonizing the results of the MSM and the parameters of the section of the sedimentary cover and crustal boundaries according to the drilling data and the work previously performed by the reflected wave method (MOVZ). It was found that the Anapa flexure and longitudinal tectonic zones have clear deep roots, and also separate the pericline of the North-Western Caucasus from the Taman Peninsula and from the lowered blocks of the Northern slope of the folded system.Faults in the study area a...

Research paper thumbnail of Model of the Deep Structure of the Elbrus Volcano in the Light of New Geophysical Data

Doklady Earth Sciences, 2018

A geophysical section by the method of microseismic sounding is obtained along the profile that c... more A geophysical section by the method of microseismic sounding is obtained along the profile that completely crosses the Elbrus volcano in the area of its eastern summit. The peculiarities of the deep structure and edifice of the Elbrus volcano are revealed.

Research paper thumbnail of The Velocities of Modern Horizontal Movements in the Central Sector of the Greater Caucasus According to GPS Observations and Their Relationship to Tectonics and Deep Structure of the Earth's Crust

Доклады академии наук, 2018

Research paper thumbnail of Microseismic Sounding in the Oil & Gas Complex Objects Control Problems

66th EAGE Conference & Exhibition, 2004

Research paper thumbnail of Natural Hazards and Earth System Sciences Geophysical Observatory in Kamchatka region for monitoring of

Abstract. Regular monitoring of some geophysical parameters in association with seismicity has be... more Abstract. Regular monitoring of some geophysical parameters in association with seismicity has been carried out since last year at the Japan-Russian Complex Geophysical Observatory in the Kamchatka region. This observatory was organized in connection with the ISTC project in Russia and was motivated by the results of the FRONTIER/RIKEN and FRONTIER/NASDA research projects in Japan. The main purpose of the observations is to investigate the electromagnetic and acoustic phenomena induced by the lithosphere processes (especially by seismic activity). The seismicity of the Kamchatka area is analyzed and a description of the observatory equipment is presented. At present, the activity of the observatory includes the seismic (frequency range �F = 0.5 − 40 Hz) and meteorological recordings, together with seismo-acoustic (�F = 30 − 1000 Hz) and electromagnetic

Research paper thumbnail of Recherche De Signes Precurseurs De Tremblements De Terre en Moldavie

LA MONOGRAPHIE EST CONSACREE A L'ORGANISATION D'OBSERVATIONS PERMETTANT DE PREVOIR DES PH... more LA MONOGRAPHIE EST CONSACREE A L'ORGANISATION D'OBSERVATIONS PERMETTANT DE PREVOIR DES PHENOMENES SISMIQUES EN MOLDAVIE. ON PRESENTE DES DONNEES CONCERNANT LE SYSTEME D'OBSERVATION. ON DONNE UN BREF APERCU DE LA SISMICITE DU PAYS. ON DECRIT UN SYSTEME AUTOMATIQUE DE COLLECTE, DE STOCKAGE ET DE TRAITEMENT DES DONNEES GEOLOGIQUES ET PHYSIQUES. ON DISCUTE DES PROBLEMES METHODOLOGIQUES D'ANALYSES DE SERIES TEMPORELLES OBTENUES LORS D'OBSERVATIONS FAITES POUR PREVOIR DES PHENOMENES SISMIQUES. ON MONTRE, DANS LE CHAPITRE CONSACRE A CES OBSERVATIONS, QU'IL EST POSSIBLE DE SE SERVIR DE METHODES STATISTIQUES POUR METTRE EN EVIDENCE DES SIGNES PRECURSEURS A LONG TERME DE TREMBLEMENTS DE TERRE. (INV. 19867 - GMS1 - M.MAGNAN).

Research paper thumbnail of A Complexity of the Displacement Along Segments of the Akhtyirskiy Fault

Emergence, Complexity and Computation, 2014

A distinctive features of the Ahtyirskiy fault (Krasnodar, Russia) are its long length and the un... more A distinctive features of the Ahtyirskiy fault (Krasnodar, Russia) are its long length and the unusual geological structure. The fault demarcates the boundary between highlands and flat landform. To study the fault displacement we have applied two methods. The first structural–geo-morphological method reconstructs orientation of the compression/expansion axis in a horizontal plane and thus determines the direction of a horizontal displacement along the fault. In this study the method has been modified by analyzing of individual segments of the Ahtyirskiy fault. Another method is the microseismic sounding that determines a distribution of surface wave characteristics in a vertical plane. We conclude that the displacement along the fault has average direction, which we call the upthrust right-shift. However there are segments that are deformed in a special manner and displacements along them can not be explained via theoretical models. Mainly the fault plane falls to the south direction while its individual parts fall to the north.

Research paper thumbnail of Структура и современная геодинамика мегантиклинория Большого Кавказа в свете новых данных о глубинном строении

Геотектоника, 2015

С помощью технологии микросейсмического зондирования (ММЗ) были составлены глубинные разрезы вдол... more С помощью технологии микросейсмического зондирования (ММЗ) были составлены глубинные разрезы вдоль двух профилей, пересекающих центральную часть Большого Кавказа в Осетии и северо-западную – в районе г. Туапсе. Выявленные неоднородности литосферы обнаруживают тесную связь с тектоническими деформациями орогенного этапа и молодым вулканизмом. Вдоль профиля в Осетинском секторе Большого Кавказа установлено наличие трех характерных по свойствам и морфологии глубинных объемов в земной коре под горной системой. А именно, наличие субвертикального низкоскоростного объема и двух обрамляющих его с севера и юга субвертикальных высокоскоростных объемов. Низкоскоростной объем расположен в основном под осевой частью мегантиклинория Большого Кавказа, а высокоскоростные – под южным и северным крыльями. Практически под всей структурой ядра складчатого сооружения на глубине примерно 10 км прослеживается выдержанная горизонтальная кровля низкоскоростного тела. В Туапсинском секторе, вблизи западной периклинали мегантиклинория, контрастность низкоскоростного тела существенно меньше. Там наиболее контрастные, узкие низкоскоростные тела приурочены к границе Предкавказского (Западно-Кубанского) прогиба с горным сооружением и с Адыгейским выступом.

Research paper thumbnail of Use of Seismic Methods for Study the Reasons of Building Construction Damage

61st EAGE Conference and Exhibition, 1999

Research paper thumbnail of Imaging the Volcanic Structures Beneath Gran Canaria Island Using New Gravity Data

Journal of Geophysical Research: Solid Earth

From a new gravity data set that covers homogeneously the whole surface of Gran Canaria (Canary I... more From a new gravity data set that covers homogeneously the whole surface of Gran Canaria (Canary Islands, Spain) and marine gravity data in the nearest offshore, we have obtained a Bouguer anomaly gravity map of the island which improves the previous ones. Using these gravity anomalies, we have applied a gravity inversion approach to investigate the structures beneath the surface of Gran Canaria Island and derive a 3D gravity sources model. The geometry of structures with anomalous density values is constrained up to a depth of approximately 20,000 m below the sea level. The interpretation of the density model identified structures related to the different volcanic stages of Gran Canaria. Several deep‐rooted high‐density structures represent the intrusive bodies emplaced in the early formation of Gran Canaria and the magma plumbing system of the Miocene volcanic edifices. A low‐density body in the center of the island may be associated with the syenitic core of the felsic central vol...

Research paper thumbnail of Features of the deep structure of some volcanic islands of the Canary Archipelago from the passive seismo-prospecting method

Trabajo presentado en el 26o UGG General Assembly, celebrado en Praga (Republica Checa) del 22 de... more Trabajo presentado en el 26o UGG General Assembly, celebrado en Praga (Republica Checa) del 22 de junio al 2 de julio.

Research paper thumbnail of Development of the model of El Hierro island (Canary Islands) on a basis of complementary interpretation the results of low-frequency microseismic sounding and gravimetric survey

Research paper thumbnail of Contemporary State of the Elbrus Volcanic Center (The Northern Caucasus)

Pure and Applied Geophysics, 2017

The Elbrus volcanic center is located in southern Russia on the northern slope of the main ridge ... more The Elbrus volcanic center is located in southern Russia on the northern slope of the main ridge of the Greater Caucasus. Current classifications define Elbrus as a dormant volcano that could become active even after millennia of quiescence. In this study, we use two new geophysical methods to assess the contemporary state of the Elbrus volcano. The first method is based on an evaluation of parameters of resonant modes ''reemitted'' by the resonant structure (i.e., volcanic chamber) in response to the excitation of a seismic impact and recorded by a precise laser interferometer-strainmeter. The second method is based on lowfrequency microseismic sounding and allows determination of the deep structure of complicated geological objects. Our study locates the magma chamber at depths of 1-8 km and extended magma source at depths of 15-40 km beneath the Elbrus eastern summit. An unknown magmatic structure, comparable to the Elbrus magmatic structure but currently much colder, was also identified 50 km from Mt. Elbrus. Based on our analysis, we assess the Elbrus volcano to be currently in a quasi-stable state of thermodynamic equilibrium.

Research paper thumbnail of A laser deformometer applied to seismic detector metrological characteristics

Measurement Techniques, 1993

A set of standard equipments is considered for reproducing seismic oscillation parameters that ha... more A set of standard equipments is considered for reproducing seismic oscillation parameters that have been developed at the Mendeleev All-Union Metrology Research Institute.

Research paper thumbnail of Examples of Practical Testing of the Method of Microseismic Sensing in the Interests of Studying, Exploration and Development of Hydrocarbon Deposits

New Challenges in Fundamental and Applied Petroleum Geology: Conference Proceedings, 2021

Research paper thumbnail of The microseismic sounding method: Application for the study of the buried diatreme structure

Doklady Earth Sciences, 2009

Research paper thumbnail of Deep Structure of the Northwestern Termination of the Caucasus from New Geological and Geophysical Data

Izvestiya, Physics of the Solid Earth, 2020

Abstract—In 2014–2019, integrated geological and geophysical studies were carried out in the larg... more Abstract—In 2014–2019, integrated geological and geophysical studies were carried out in the largest flexural-rupture and fold-and-fault zones of the Northwest Caucasus (the Anapa, Akhtyr, Moldavanovka, Karabetov, Fanagoria and Azov anticlinal ridges and the Pshekha–Adler, Kerch–Tuzla, and Kerch Strait faults). Microseismic sounding method (MSM) was the main geophysical approach. The MSM studies identified the deep structural features of the Earth’s crust in the study region and made it possible to correlate them with the specific tectonic structures on the surface. The correlation was established by reconciling the results of the MSM studies, the parameters of sedimentary cover section, and crustal discontinuities revealed by drilling and previous studies of the converted waves from the earthquakes. It is found out that the Anapa flexure and longitudinal tectonic zones have the distinct deep roots beneath them. The trans-Caucasian Anapa flexural-rupture zone separates the pericline...

Research paper thumbnail of Deep and shallow structure model of Gran Canaria using mircoseismic sounding and gravity inversion

Research paper thumbnail of Influence of the Contribution of Body Waves to the Result of the Microseismic Sounding Method

Acoustical Physics, 2020

The article presents a numerical study of the formation of the amplitude response in a free surfa... more The article presents a numerical study of the formation of the amplitude response in a free surface from simultaneous scattering of Rayleigh waves and vertically incident longitudinal waves by an embedded contrast velocity inclusion. It has been established that the significant presence of body waves in a microseismic field does not fundamentally change the result of the microseismic sounding method, which is based on the notion of the overwhelming contribution of the fundamental mode of a Rayleigh wave to the formation of the Earth's microseismic field. Cases are considered when a microseismic signal at the same frequency is modeled only by the fundamental mode of the Rayleigh wave, only by a vertically incident longitudinal wave, and by both types of waves simultaneously. Variants of inhomogeneities with different dimensions and velocity properties are considered. The analysis was performed in a (λ, r)-space, in analogy with reconstruction of the structure of the geological setting in the microseismic sounding method, where λ is the wavelength of the fundamental Rayleigh mode and r is the coordinate on the Earth's surface.

Research paper thumbnail of Deep Structure, Volcanic and Seismic Activity Regime in Elbrus Region

Geotectonics, 2018

According to obtained results of profiling by microseismic sounding method along the line in subm... more According to obtained results of profiling by microseismic sounding method along the line in submeridional direction crossing the eastern cone of the Elbrus volcano and a magmatic chamber was found under the Elbrus volcano in the range of depths of 7-13 km below sea level with horizontal size of ≈ 7 km. At the depths of 18-40 km, a narrow linear magmatic focus steeply dipping in the southern direction is deduced, its horizontal size in the cross section is ≈5 km underlain by another magmatic focus at the depths of 45-55 km, penetrating the upper mantle. The found magmatic chamber and earthquake center in the crust section are formed by isometric and linear low-velocity bodies. The sections of two profiles show deep faults correlated with morphological features revealed on the surface. To the south of Tyrnyauz town at the depths of 17-40 km below sea level, a low-speed steeply sinking in the northern direction linear body was found and interpreted as cool volcanic channel approximately at the size of Elbrus. Having carried out geophysical research we obtained data on 7 ancient earthquakes with magnitude M = 6.5-7.0 occurred over past 7000 years in the vicinity of the volcano. In that historic period five strong eruptions of Elbrus volcano had happened. We settled the absence of time commonality in activations of volcanism and seismicity. Currently Elbrus volcano is in a phase of deep seismic abate. In 2004-2017 we have fulfilled geological, geophysical and paleoseismological research that confirms Elbrus is not completely extinct volcano.

Research paper thumbnail of Deep structure of the Anapa flexural-rupture zone, Western Caucasus

Геотектоника, 2019

In the period from 2007 to 2017 complex geological and geophysical studies were carried out in th... more In the period from 2007 to 2017 complex geological and geophysical studies were carried out in the three largest flexural-rupture fault zones in the North-West Caucasus (Anapa, Akhtyrka and Moldavan). The micro-seismic sounding (MSM) was used as the main geophysical method. Studies with the help of MSM allowed us to identify the features of the deep structure of the earth’s crust in the study area and to associate them with specific tectonic structures on the surface.The binding was carried out by harmonizing the results of the MSM and the parameters of the section of the sedimentary cover and crustal boundaries according to the drilling data and the work previously performed by the reflected wave method (MOVZ). It was found that the Anapa flexure and longitudinal tectonic zones have clear deep roots, and also separate the pericline of the North-Western Caucasus from the Taman Peninsula and from the lowered blocks of the Northern slope of the folded system.Faults in the study area a...

Research paper thumbnail of Model of the Deep Structure of the Elbrus Volcano in the Light of New Geophysical Data

Doklady Earth Sciences, 2018

A geophysical section by the method of microseismic sounding is obtained along the profile that c... more A geophysical section by the method of microseismic sounding is obtained along the profile that completely crosses the Elbrus volcano in the area of its eastern summit. The peculiarities of the deep structure and edifice of the Elbrus volcano are revealed.

Research paper thumbnail of The Velocities of Modern Horizontal Movements in the Central Sector of the Greater Caucasus According to GPS Observations and Their Relationship to Tectonics and Deep Structure of the Earth's Crust

Доклады академии наук, 2018