scholarly journals Preface

2021 ◽  
Vol 929 (1) ◽  
pp. 011001
Keyword(s):  
Earth Sciences ◽  
Deep Structure ◽  
Special Section ◽  
Earth’S Crust ◽  
General Level ◽  
Research Station ◽  
Research Activity ◽  
Crust And Upper Mantle ◽  
Geological Processes ◽  
Earth's Crust

Abstract VIII International Symposium “PROBLEMS OF GEODYNAMICS AND GEOECOLOGY OF INTRACONTINENTAL OROGENS” (June, 28 – July, 2, 2021; Bishkek, Kyrgyz Republic; online regime via Zoom due to the restrictions associated with the COVID-19 pandemic) was held within the framework of the Year of Science and Technology in Russia and was dedicated to 85th birthday anniversary of Yuri Trapeznikov – the founder and the first director of the Research Station of the Russian Academy of Sciences in Bishkek city (RS RAS). The Symposium became a representative international scientific event held on the basis of the RS RAS and the International Research Center - Geodynamic Proving Ground in Bishkek (IRC-GPG). More than 100 scientists and specialists from seven countries (Russia, Kyrgyzstan, Kazakhstan, Uzbekistan, Tajikistan, Ukraine and Japan) took part in the Symposium with online reports. The basic themes of the Symposium were quite diverse and related to the main directions of fundamental research in the area of Earth sciences: • Deep structure and evolution of the Earth’s crust and upper mantle in the light of modern conceptions of Geodynamics. Instrumental methods of studying of intracontinental orogens lithosphere: heterogeneities, physical nature of boundaries. • Stressed and deformed state of the Earth’s crust, problems of its block structure and selfsimilarity of geodeformation processes. Seismotectonics of intracontinental orogens zones. • Complex monitoring of seismically active zones. Problems of geospheres interaction, including the influence of physical fields on endogenous processes. • Electromagnetic methods in studying of seismically active regions and in monitoring of geodynamic processes. Development of inversion methods of electromagnetic data. • Assessment of seismic risk, regional studies of seismic regime. • Environmental and social consequences of endogenous and exogenous geological processes, prediction of hazardous events (earthquakes, landslides, etc.). Each of the mentioned themes was considered separately during special section. There were about 30 young researchers who took part in the Symposium – this participation allowed them to become involved in the modern scientific achievements in the Earth sciences area, as well as to receive the leading specialists consultations needed for the successful further research activity. The Symposium states that such meetings and forms of scientific and human communication are very useful and contribute to increase the general level and developing various areas of research in the field of Earth sciences. List of ORGANIZING COMMITTEE, Photo, Logos are available in this pdf.

scholarly journals Martin Harold Phillips Bott. 12 July 1926—20 October 2018

2019 ◽  
Vol 67 ◽  
pp. 89-117
Author(s):  
Anthony Brian Watts
Keyword(s):  
Oil And Gas ◽  
Deep Structure ◽  
Oil And Gas Industry ◽  
Magnetic Anomalies ◽  
Earth’S Crust ◽  
Field Methods ◽  
Crust And Upper Mantle ◽  
Geological Interpretation ◽  
Gravity And Magnetic ◽  
Earth's Crust

Martin Bott was a geophysicist who made fundamental contributions to our understanding of gravity and magnetic anomalies and their geological interpretation. His research on the deep structure of the Earth's crust was both pioneering and innovative, and he showed how field geophysical measurements could be used to address geological problems such as the mechanics of granite emplacement, sedimentary basin formation and mountain building. When he began his research, the use of gravity and magnetic anomalies to understand deep crustal structure was in its infancy and largely confined to research laboratories in the oil and gas industry. Four decades later his lifetime efforts have seen the emergence of potential field methods as one of the principal means of constraining the structure, stress state and long-term strength of the Earth's crust and upper mantle in continents and oceans. Martin was an inspiring undergraduate teacher and outstanding supervisor, as reflected by his many research students who went on to prominent leadership positions in academia, government and industry. He leaves a legacy of more than 150 scientific papers in peer-reviewed journals and a lucidly written and beautifully illustrated textbook. As well as his many scientific achievements, Martin was an accomplished mountaineer, a dedicated churchgoer and an avid gardener. He saw no conflict between his science and his enduring Christian faith.

scholarly journals Structure of the Earth crust and upper mantle along seismological profile Mezen–Timan–Pechora (MEZTIMPECH)

LITOSFERA ◽  
2020 ◽  
Vol 20 (4) ◽  
pp. 517-527
Author(s):  
V. V. Udoratin
Keyword(s):  
Upper Mantle ◽  
Deep Structure ◽  
Structural Features ◽  
Earth’S Crust ◽  
Seismic Section ◽  
Crust And Upper Mantle ◽  
Research Results ◽  
The Earth ◽  
Geophysical Surveys ◽  
Earth's Crust

Object of study. The article was devoted to investigation of the depth structure of the Earth’s crust and upper mantle along the Mezen–Timan–Pechora seismic profile (MEZTIMPECH), crossing the southern parts of the Mezen syneclise, the Timan ridge and the Pechora syneclise. Total profile length was 525 km. Materials and methods. In the course of writing the article, the data obtained by performing seismic surveys using the earthquake exchange wave method were used. The processing involved seismic data using the methods of deep seismic sounding, reflected waves, a common depth point, a correlated method of refracted waves, and materials from well geophysical surveys. In interpreting the research results, generalizing models of the deep structure of the territory were employed. Research results. As a result of the interpretation of the records of the method of exchange waves of earthquakes and the subsequent mathematical modeling, a geological and geophysical section was constructed to a depth of about 100 km and a number of seismic boundaries were identified. The pivotal boundaries of the exchange were: Ф0 – the surface of the Riphean folded basement, Ф – the surface of the pre-Riphean crystalline basement, M – the surface of Mohorovich, identified with the roof of the upper mantle. Additionally, horizons K1–K4 – in the crust of the Earth, M1, M2 – in the upper mantle were traced. Four regional geoblocks were distinguished in the seismic section, differing in depth of the basement surface, the Moho sectionand the underlying structural features of the consolidated crust: the Kirov-Kazhim aulacogen, the Vychegda depression, the Timan ridge and the Pre-Ural downfold. Conclusions. The results of deep seismic studies reflected regional features of the structure of the Earth’s crust and were the basis for the construction of tectonic models of large geological objects.

scholarly journals Deep structure and metallogeny of the earth's crust

1989 ◽  
Vol 20 (2) ◽  
pp. 37
Author(s):  
V.A. Erkhow
Keyword(s):  
Crustal Structure ◽  
Upper Mantle ◽  
Deep Structure ◽  
Earth’S Crust ◽  
Magnetic Data ◽  
Crust And Upper Mantle ◽  
Geophysical Field ◽  
Deep Crust ◽  
Deep Crustal Structure ◽  
Earth's Crust

Considerable experience with integrated geological and geophysical studies has enabled definition of deep crustal structures and, within limits, composition and processes within the deep crust, and to determine their association with metallogeny in the USSR.By means of seismic experiments, stratification of the Earth's crust and the upper mantle to a depth of about 100 km has been revealed. Numerous heat flow data have been compiled. Magneto-telluric soundings made it possible to determine the position of conductive strata in the crust and upper mantle for a number of areas. Gravity surveys coupled with the results of seismic profiling enabled the finding of a number of empirical laws that are useful for investigation into the deep crust. Magnetic data analysis has enabled evaluation of the magnetic layering of the deep crust. Kimberlite and ore provinces can be considered examples of these concepts.For more detailed studies of deep crustal structure the territory of the USSR is the subject of a system of regional investigation of the deep crust and upper mantle. This system is based principally upon a network of interconnected regional profiles (geotraverses) tied to deep and superdeep boreholes. The system includes predicted geophysical observations to control investigation of the geophysical field data. The geotraverse network is the basis for detailed studies within the bounds of petroleum and ore provinces.The most accurate data obtained allows the formation of a crustal model and reveals empirical relationships with metallogeny.Based on the deep crustal structure data a regional oregenesis prediction map has been made. The endogenous mineralization prediction was based on special features of the upper layering of the crust and on data relating to deep crustal permeability zones.

scholarly journals A model of the deep structure of the Earth’s crust and upper mantle in the area of the Karymshinsky gold-ore cluster according to geophysical data (South Kamchatka)

Georesursy ◽  
2020 ◽  
Vol 22 (1) ◽  
pp. 63-72
Author(s):  
Alexandr G. Nurmukhamedov ◽  
Mikhail D. Sidorov ◽  
Yury F. Moroz
Keyword(s):  
Upper Mantle ◽  
Deep Structure ◽  
Hydrothermal Systems ◽  
Earth’S Crust ◽  
The South ◽  
Converted Wave ◽  
Crust And Upper Mantle ◽  
Gold Ore ◽  
Dominant Feature ◽  
Earth's Crust

In the South of Kamchatka, modern geodynamic processes are actively taking place. A deep geological and geophysical model of the structure of the Earth’s crust and upper mantle along the regional profile of the Apacha Village-Mutnaya Bay in the zone of Tolmachevsky active magmatic center is presented. The profile passes near the South-Western border of the Karymshinskaya volcano-tectonic structure (VTS) and crosses the Ahomtenskaya VTS. The model created on the basis of integrated interpretation of materials of the earthquake converted-wave method (ECWM), gravity and magnetotelluric sounding (MTS). The thickness of the Earth’s crust along the profile varies from 30-33 km at the edges reaching 44-46 km, in its central part. The dominant feature of the model is a high-density formation – a block of the Earth’s crust, saturated with intrusions of the main and ultrabasic composition. The formation of the block is associated with a permeable zone between the crust and the upper mantle. In the block correlation of seismic boundaries is disturbed and in a density model the area with massive heterogeneity is allocated. A significant increase in depth to the M-Boundary in the center of the model is explained by the presence of a “bloated” transition layer between bark and mantle in this place. The thickness of the layer is about 10 km, and the density of the mantle reaches 3.4 g/cm3. It is assumed that this is a site of eklogization of breeds in a zone of paleosubduction of oceanic lithosphere under a continental. The area is favorable for the accumulation of meteor waters, which are in contact with high-temperature environment and postmagmatic solutions of intrusions, which leads to the formation of hydrothermal systems. The genetic connection of Karymshinsky gold-ore cluster with the intrusive array of medium-sour composition, allocated in the zone of the Tolmachevsky active Magmatic Center is shown.

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