Reflection of the State of Magmatic Matter and Seismotectonic Features of the Structure of the Avachinsky–Koryaksky and Dzenzur–Zhupanovsky Volcanic Groups of Kamchatka in Terms of Kinematic Parameter VP/VS

Slavina, L.B.; Kuchay, M.S.

Авторы: Slavina L.B., Kuchay M.S.
Журнал: Izvestiya - Atmospheric and Oceanic Physics
Том: 57
Номер: 11
Год издания: 2021
Издательство: Pleiades Publishing, Ltd
Местоположение издательства: Road Town, United Kingdom
Первая страница: 1422
Последняя страница: 1435
Оригинальные версии: ОТРАЖЕНИЕ СОСТОЯНИЯ МАГМАТИЧЕСКОГО ВЕЩЕСТВА И СЕЙСМОТЕКТОНИЧЕСКИХ ОСОБЕННОСТЕЙ СТРОЕНИЯ АВАЧИНСКО-КОРЯКСКОЙ И ДЗЕНЗУР-ЖУПАНОВСКОЙ ГРУПП ВУЛКАНОВ КАМЧАТКИ В КИНЕМАТИЧЕСКОМ ПАРАМЕТРЕ VP/VS
DOI: 10.1134/s0001433821110086
Аннотация: For regional earthquakes, the kinematic parameter VP/VS, an analog of the TAU parameter, was analyzed in order to study the state of magmatic matter, structural features, and seismotectonic position of the Avachinsky–Koryaksky and Dzenzur–Zhupanovsky volcanic groups. The distribution of the parameter over area and depth was investigated; the structure and state of matter of the magma chamber were estimated. The questions about volcanic feeder sources, the relationship, and correlation of volcanic formations with the source layer subducting under Kamchatka (subduction layer) are considered. An idea was obtained about the peculiarities of the distribution of VP/VS of the geological setting, the territory from the southern end of the Central Kamchatka Depression, the Ganalsky Ridge of metamorphic rocks in the northwest, to the coastal slope of the Avachinsky Bay shelf in the southeast. The paper considers the question of the seismotectonic position of the volcano group due to the peculiarities in the structure of this region, in particular the Nalachevskaya dome-ring structure. It is shown that VP/VS carries information on the state of the geological setting of volcanic structures, as well as on the change in its thermodynamic parameters: temperature, pressure, and fluid and gas saturation. The parameter is a marker and can provide information on the intense state of broken structures of the geological setting, can be used to identify areas of compression (compaction) andstretching (dilatation).
Добавил в систему: Славина Лидия Борисовна

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Reflection of the State of Magmatic Matter and Seismotectonic Features of the Structure of the Avachinsky–Koryaksky and Dzenzur–Zhupanovsky Volcanic Groups of Kamchatka in Terms of Kinematic Parameter VP/VSстатья

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