The Structure of the Onega Downthrown Block and Adjacent Geological Objects According to the Microseismic Sounding Method

Данилов, К. Б.

doi:10.1007/s00024-017-1542-x

Cited by 8 publications

(9 citation statements)

References 20 publications

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“…Since transverse waves are "sensitive" to flooding, the weakening of oscillation amplitudes in the middle of the dam indicates the presence of a moisture-saturated region. On the other hand, for the fundamental Rayleigh wave mode, the amplitude of the vertical component of the displacement velocity increases for low-velocity anomalies of the geological environment and decreases for high-velocity ones [42,43]. Note that in Fig.…”

Section: Discussionmentioning

confidence: 85%

The earth-fill dam state express investigation using mechanical vibrations produced by HPP

Antonovskaya

Kapustyan

2022

Frattura Ed Integrità Strutturale

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The usage of mechanical vibrations produced by the hydropower plant (HPP) turbine may be used for seismic sounding of large-scale constructions as the earth-fill dam and its abutment contacts. Such vibrations are monochromatic oscillations on main frequencies and their harmonics produced by turbine. Seismic sensors installed on the dam's crest and inside it, if it possible, and in the area of abutment contacts register microseisms include HPP turbine operation vibrations which may be extracted by seismic data processing, i.e., filtering. We discuss two data processing possibilities: symphonious filter as the hardware one and power spectrum calculation as digital one. We consider the two case of earth-fill dams state investigations. There are the Chiryurt HPP dam (Republic of Dagestan, Russia, 9.5 m high) and the Nurek HPP dam (Tajikistan, 300 m high). We show the possibilities of seismic express investigations using signals of main frequencies produced by HPP turbine for dam sounding. For Chiryurt dam the extra fluid filtering in the central part of the dam was revealed. Nurek dam abutment contact monitoring showed the temporal variation of its stress-strain state associated with deformation variation 10-5-10-6 presumably due to regional seismicity.

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Section: Discussionmentioning

confidence: 85%

The earth-fill dam state express investigation using mechanical vibrations produced by HPP

Antonovskaya

Kapustyan

2022

Frattura Ed Integrità Strutturale

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“…Zones with a higher relative microseism intensity represent an area with relatively reduced velocity properties and vice versa. A more detailed description of the method is presented in Gorbatikov et al (2013), Danilov (2017) and Kugaenko et al (2018).…”

Section: Passive Seismic Methodsmentioning

confidence: 99%

Deep structure of the Verkhnetovskaya kimberlite pipe in the Arkhangelsk diamondiferous province according to passive seismic and radiological methods

Данилов

Yakovlev

Afonin

et al. 2022

Geophysical Prospecting

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The exploration of kimberlite pipes is difficult. However, information about their deep structure is necessary for tasks such as prospecting, exploration and development of kimberlite pipes. Therefore, it is necessary to increase the efficiency of deep structure research. In addition, pipes in different territories differ in their properties. The latter requires the study of the peculiarities of the manifestation of pipes in various areas. The Verkhnetovskaya pipe is the only kimberlite object currently known in the Chernoozerskaya area of the Arkhangelsk diamondiferous province. This indicates the need for a comprehensive study of this pipe. The main reason it is difficult to study the pipes of the Arkhangelsk diamondiferous province is the large overburden thickness. In order to increase the efficiency of prospecting, we used a set of methods: microseismic sounding method, passive seismic interferometry, H/V method, gamma spectrometry and emanation mapping. The analysis showed that a new field measurement technique was tested in this research, resulting in more stable data. The main improvement in field measurements is the determination of the optimal accumulation time of microseism when implementing the microseismic sounding method. In addition, the location of the stations in the implementation of passive interferometry made it possible to minimize the influence of the azimuthal distribution of ambient noise sources. The studies made it possible to construct the geophysical image of the investigated pipe and the surrounding medium. As a result, it was shown that the northwestern side has a vertical structure, while according to the drilling data, the side has a uniform slope. In particular, the presence of previously unknown lateral channels was shown. The proposed methodology made it possible to obtain important information with minimal time and technical costs, confirming the applicability of the proposed methodology in the Chernoozerskaya area.

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“…С другой стороны, в ходе исследований БТТИ было высказано предположение о существовании в коре протяженных сублатеральных магмоводов [Большое…, 1984; Федотов и др., 1991; 2010; 2011; 2014; Флеров и др., 1984; и др.]. Проблема усложняется еще и поступлением на поверхность базальтов контрастного состава: высокомагнезиальных (Mg-базальтов), глиноземистых (Al-базальтов) и их промежуточных разностей, генезис которых в пределах единого центра активности вызывает споры и продолжает активно обсуждаться [Волынец и др., 1978;Ермаков, Геншафт, 1980;Ермаков В.А., Ермаков А.В., 2006;Колосков и др., 2015;2017;Флеров и др., 2015;Churikova et al, 2015б;Portnyagin et al, 2015;Volynets et al, 2015;и др.]. Таким образом, Толбачинскй Дол, типичное поле ареального базальтового вулканизма, представляет интерес как пример сложно построенных геологических сред, для изучения которых должны привлекаться специализированные инструментальные методы.…”

Section: физика землиunclassified

“…В частности, возможность выделять субвертикальные структуры и исследовать объекты с глубинными "корнями" продемонстрирована для грязевых вулканов и кимберлитовых трубок [Собисевич и др., 2008;Горбатиков и др., 2009;Danilov, 2017]. Накапливается опыт исследований магматических аппаратов различных активных вулканических областей: вулканический остров Эль Иерро в Канарском архипелаге [Gorbatikov et al, 2013]…”

Section: физика земли № 3 2018unclassified

ОСОБЕННОСТИ ГЛУБИННОГО СТРОЕНИЯ ЗОНЫ ТРЕЩИННЫХ ТОЛБАЧИНСКИХ ИЗВЕРЖЕНИЙ (КАМЧАТКА, КЛЮЧЕВСКАЯ ГРУППА ВУЛКАНОВ) ПО КОМПЛЕКСУ Геолого-Геофизических ДАННЫХ, "Физика Земли"

et al. 2018

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The Structure of the Onega Downthrown Block and Adjacent Geological Objects According to the Microseismic Sounding Method

Cited by 8 publications

References 20 publications

The earth-fill dam state express investigation using mechanical vibrations produced by HPP

The earth-fill dam state express investigation using mechanical vibrations produced by HPP

Deep structure of the Verkhnetovskaya kimberlite pipe in the Arkhangelsk diamondiferous province according to passive seismic and radiological methods

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