scholarly journals Results of the study of the geodynamics of the Ossetian part of the Central Caucasus based on satellite geodesy and regional seismicity data

2021 ◽  
Author(s):  
В.Н. Дробышев ◽  
Х.М. Хубаев ◽  
Х.З. Торчинов
Keyword(s):  
Energy Distribution ◽  
Coordinate System ◽  
Geophysical Methods ◽  
Seismic Energy ◽  
Local Deformation ◽  
Regional Seismicity ◽  
Central Caucasus ◽  
Mathematical Processing ◽  
Geological And Geophysical Methods ◽  
Tectonic Scheme

В результате проведённой работы была получена информация о геодинамическом поведении ос- новных тектонических блоков Земной коры (ЗК) в границах Горной Осетии. Принимая полученную информацию как первичную, в рамках данной работы продемонстрировано несколько методических приёмов по её матема- тической обработке. В частности, приёмы интерполяции дискретно представленных данных позволили вы- полнить построение поля скоростей GPS-пунктов в условной системе координат, проведено сопоставление его с полем распределения сейсмической энергии по территории. Выявленные локальные деформационные аномалии ЗК логично вписываются в тектоническую схему региона, установленную независимыми геологиче- скими и геофизическими методами. As a result of the work carried out, information was obtained on the geodynamic behavior of the main tectonic blocks of the Earth’s crust (GC) within the boundaries of Mountainous Ossetia. Taking the information received as primary, within the framework of this work, several methodological techniques for its mathematical processing are demonstrated. In particular, the methods of interpolation of discretely presented data made it possible to construct the velocity fi eld of GPS points in a conventional coordinate system, and compare it with the fi eld of seismic energy distribution over the territory. The identifi ed local deformation anomalies of the ZK logically fi t into the tectonic scheme of the region, established by independent geological and geophysical methods.

scholarly journals Upper Kama potassium salt deposit tectonic scheme based on physical modeling results and geological and geophysical data

2020 ◽  
pp. 38-46
Author(s):  
Filatov Vladimir ◽  
◽  
Bolotnova Liubov ◽  
Keyword(s):  
Potassium Salt ◽  
Physical Simulation ◽  
Geophysical Methods ◽  
Geological Environment ◽  
Tectonic Structure ◽  
Simulation Data ◽  
Dynamic Events ◽  
Deep Faults ◽  
Geological And Geophysical Methods ◽  
Tectonic Scheme

Introduction. The territory of the Upper Kama potassium salt deposit (UKPSD) which has been actively developed since 1932, is characterized by abnormal technogenic overload on the geological environment. This load destroys the natural balance of the geological environment, the restoration of which is accompanied by hazardous dynamic events, from rockbursts to induced earthquakes of various magnitudes. Dynamic conditions of UKPSD is determined by many factors, among which a significant role is played by tectonic factors. Tectonic structure in the form of tectonic features or criteria (or other equal conditions) are taken into account first of all when fulfilling dynamic zoning of UKPSD territory and predicting the areas of possible manifestation of dynamic events. As soon as structural and tectonic elements of geological environment are characterized by similarity and hierarchy, it is advisable to study the tectonics of the deposit at various scales by corresponding geological and geophysical methods applying physical simulation data. Research methodology. Tectonic structures similarity and hierarchy (with a crack analysed as a copy of a fault), determined the two-stage technique of studying the tectonic structure of UKPSD territory. At the first stage, according to physical simulation data, areas influenced by the deep faults enclosing the Solikamsk depression and UKPSD were reconstructed. At the second stage, analyses was carried out of UKPSD fault strike azimuths determined by geological and geophysical methods. Research results. According to the results of the physical simulation, the dimensions of the area of dynamic impact of all faults enclosing the Solikamsk depression taking into account their kinematic type, and strikes and kinematics of faults within the zone of each fault were determined. Statistical analysis was carried out together with rose diagrams of strike azimuths of faults in the foundation and faults in UKPSD depth determined according to the results of magnetic field local anomalies interpretation, geomorphological data, satellite and aerial images. Summary. Tectonic scheme of UKPSD is not random. It is determined basically by the kinematics of deep faults enclosing UKPSD, and the tectonics of the foundation.

INTERDEPENDENCE IN WORLD‐WIDE OIL EXPLORATION

Geophysics ◽  
1958 ◽  
Vol 23 (2) ◽  
pp. 318-325
Author(s):  
D. C. Ion
Keyword(s):  
World Wide ◽  
Geophysical Methods ◽  
Oil Industry ◽  
Oil Exploration ◽  
Mutual Dependence ◽  
Oil Companies ◽  
The Past ◽  
The World ◽  
Geological And Geophysical Methods ◽  
Early Training

Current exploration for oil is being conducted by governments, major integrated oil companies, independent oil companies and syndicates, all of whom have different interests. The interdependence of the various aspects of exploration, production, transportation, refining and consumption within the oil industry is obvious; but the interdependence of the producing, transit, refining, and consuming countries has only recently been realized by the world. Within the exploration branch of the oil industry the mutual dependence of geological and geophysical methods has become generally accepted over the past thirty years. Good early training and collaboration along the whole chain of exploration can solve many industrial problems, and education can solve the world‐wide problems between countries

Determination of vector Euler parameters

2018 ◽  
Vol 932 (2) ◽  
pp. 2-9 ◽  
Author(s):  
A.A. Kluykov
Keyword(s):  
Geophysical Methods ◽  
Kinematic Parameters ◽  
Euler Parameters ◽  
Tectonic Plates ◽  
Euler Vector ◽  
Kinematic Models ◽  
Fortran Language ◽  
Mathematical Processing ◽  
Good Agreement

Improving the accuracy of points coordinates determination from geodetic networks with the use of modern space geodesy techniques (GPS, SLR, VLBI, DORIS) identified factors that were earlier considered as insignificant. Such factors include the movement of tectonic plates. This made possible the transition from the static coordinate system model to the kinematic one. For the effect of the tectonic plates movement on the points coordinates you must know kinematic parameters of the tectonic plates movement – the Euler vector parameters – angular velocity of the tectonic plates rotation and the poles rotation coordinates (latitude and longitude) of tectonic plates. Many modern kinematic models of tectonic plates are used observations, performed by geophysical methods, to estimate kinematic parameters of the tectonic plates movement. The article presents the algorithm that allows to estimate the parameters of the tectonic plates movement from mathematical processing of geodetic measurements carried out at points distributed over the surface of tectonic plates. Based on the presented algorithm the EULER program was developed in the algorithmic FORTRAN language, which was experimentally tested. The analysis results showed that the parameters of the Euler vector obtained by the EULER program are in good agreement with the results obtained by using ITRF 2005 and ITRF 2008 models.

scholarly journals Geodetic, geophysical and geographical methods in landslide investigation: Luar case study

2020 ◽  
Vol 164 ◽  
pp. 01014
Author(s):  
Vladislav Zaalishvili ◽  
Khisa Chotchaev ◽  
Dmitry Melkov ◽  
Olga Burdzieva ◽  
Boris Dzeranov ◽  
...  
Keyword(s):  
Geophysical Methods ◽  
Reference Object ◽  
Anthropogenic Activity ◽  
Static State ◽  
Natural Processes ◽  
Geodynamic Processes ◽  
Central Caucasus ◽  
Active Landslide

According to the variety and the intensity of dangerous natural processes occurence, the Greater Caucasus can serve as a natural laboratory, where geodynamic processes of a different order proceed continuously. One of the most destructive natural processes are the landslides. A reference object in this regard is the Luar landslide, which has included all the extreme features of landslide structures known in the Central Caucasus, but has not revealed the secrets of its static state, the determination of which is the most important task of the scientific research. An active landslide formed as a result of anthropogenic activity (slope cutting ) is also considered. The mentioned objects were examined by the geodetic and geophysical methods. Appropriate monitoring systems have been created.

scholarly journals Nøvling: An unusual salt structure on the soutbern margin af the Danish Basin

1998 ◽  
Vol 44 ◽  
pp. 139-149
Author(s):  
Ivan Madirazza ◽  
Bo Holm Jacobsen
Keyword(s):  
Geophysical Methods ◽  
Late Glacial ◽  
Flower Structure ◽  
Tectonic Events ◽  
Reflection And Refraction ◽  
Refraction Seismic ◽  
Salt Structure ◽  
Wrench Fault ◽  
Geological And Geophysical Methods ◽  
Glacial Time

The N~vling salt structure is located on the southern margin of the Danish Zechstein Basin. The present study of this structure is based on a detailed gravity survey, reflection and refraction seismic data, and well information. Apart from the exploratory well NØvling-l, and a shallower well Herning-l, a number of wells, mainly 20-30 m deep, were drilled in this general area (by the Geological Survey of Denmark). Through this combined study using geological and geophysical methods it is possible to distinguish several stages in the development of the N~vling structure. It is shown that these stages are closely related to faulting at the base Zechstein level. The faulting, which apparently started as normal faulting in the Triassic, triggered the first salt movements from the deeper parts of the basin to this peripheral area. The faulting was reactivated during the late Jurassic, resulting in the formation of a salt pillow. The tectonic regime changed in the post-Paleocene tertiary when transpressional movements along a prominent basement wrench fault became dominant. This ultimately resulted in the formation of a positive flower structure and the uplifting of the Saale Quatemary surface. At shallow depths the salt became dissolved creating a topographic depression above the flower structure. The present depression was formed at the beginning of the last late glacial time. Quatemary landforms in the N~vling area are therefore greatly influenced by recent tectonic events.

scholarly journals Analysis of changes in the coordinates of the “Tavaksay” geodynamic polygon

2021 ◽  
Vol 310 ◽  
pp. 03002
Author(s):  
Erkin Mirmakhmudov ◽  
Vahidjon Niyazov ◽  
Vazira Makhamatova ◽  
Nozima Muminova
Keyword(s):  
Coordinate System ◽  
Covariance Matrix ◽  
Local Deformation ◽  
Time Interval ◽  
Navigation Systems ◽  
Laser Measurements ◽  
Deformation Processes ◽  
Spatial System ◽  
Gnss Measurements

This article presents the results of GNSS and laser measurements at the “Tavaksay” geodynamic polygon. Describes the classical methods for determining the change in coordinates based on triangulation and leveling. Ways to improve the accuracy of local microplate tectonics using navigation systems are outlined here.The coordinates of the benchmarks were calculated in the rectangular GaussKruger coordinate system and the spatial system B, L, H for CK42 and WGS84.The trilateration method for determining the distances between points of the geodynamic network is analyzed. An assessment of the accuracy of the coordinates of points and the distances between them, depending on the number of measurement cycles, has been made.The accuracy of the trilateration and GNSS method for this network is graphically presented. The diagonal elements of the covariance matrix of GNSS measurements are investigated. It is proposed to make homogeneous GNSS and laser measurements at the tops of the hills at a certain time interval to study local deformation processes.

scholarly journals DETECTION ZONES OF DISJUNCTIVE DISLOCATIONS FOR THE TERRITORY OF NORTHERN SAKHALIN BY DATA OF SPACE SURVEYS

2021 ◽  
Vol 4 (1) ◽  
pp. 79-85
Author(s):  
Olesya V. Kuptsova ◽  
Alexey A. Verkhoturov ◽  
Vyacheslav A. Melkiy
Keyword(s):  
Oil And Gas ◽  
Geophysical Methods ◽  
Sakhalin Island ◽  
Landsat 8 ◽  
Electromagnetic Spectrum ◽  
Industrial Facilities ◽  
The North ◽  
Geological And Geophysical Methods ◽  
Gas Bearing ◽  
Spectral Channels

The article presents results of the research of disjunctive dislocations of the earth's crust in northern part of the Sakhalin Island by analyzing the fields of lineaments, which identified on basis of satellite surveys using the LEFA software package. The object of research was chosen not by chance: eastern part of territory of the north of Sakhalin Island is quite well studied by geological and geophysical methods in order to identify oil and gas-bearing structures, as well as in connection with the close attention to it after catastrophic Neftegorsk earthquake on May 28, 1995. The result of work of the predecessors made it possible for verify the reliability of results obtained and assess of prospects to using automated decryption technologies to identify seismically active zones. The purpose of work was to create maps of active fault zones on studied territory. In process of the work, the SRTM data and Landsat-8 satellite images for 2015-2020, obtained in eight spectral channels, were analyzed using algorithms for detecting the location of lineaments based on methods of mathematical processing of images using different algorithms. It was revealed that images obtained in the red, infrared zones of the electromagnetic spectrum (4, 5, 6, 7), and the panchromatic channel (8) are most informative for identifying disjunctive disorders. Based on the data obtained, maps of disjunctive disorders of Sakhalin Island on scale of 1: 500,000 compiled. The article has certain novelty due to fact that the LEFA technological techniques were first used for research the geologically complex structures of Northern Sakhalin. The main results of the work will be useful in choosing places for construction of economic and industrial facilities, as well as in the exploration, search and operation of mineral deposits.

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