Multiple edifice failures, debris avalanches and associated eruptions in the Holocene history of Shiveluch volcano, Kamchatka, Russia

Авторы: Belousov A., Belousova M., Voight B.
Журнал: Bulletin of Volcanology
Номер: 61
Год издания: 1999
Издательство: Springer Verlag
Местоположение издательства: Germany
Первая страница: 324
Номер статьи: 342
Аннотация: Investigation of well-exposed volcaniclastic deposits of Shiveluch volcano indicates that large-scalefailures have occurred at least eight times in its history: approximately 10,000, 5700, 3700, 2600, 1600, 1000, 600 BP and 1964 AD. The volcano was stable during the Late Pleistocene, when a large cone was formed(Old Shiveluch), and became unstable in the Holocene when repetitive collapses of a portion of the edifice(Young Shiveluch) generated debris avalanches. The transition in stability was connected with a change incomposition of the erupting magma (increased SiO2 from ca. 55–56% to 60–62%) that resulted in an abruptincrease of viscosity and the production of lava domes.
Добавил в систему: Белоусов Александр Борисович

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