Ebeko Volcano Activity in 2022: Mechanism and Products of Eruption-Reference-Cited by-同舟云学术

Ebeko Volcano Activity in 2022: Mechanism and Products of Eruption

Published:2023-07-01 Issue:4 Volume:17 Page:3-22
ISSN:0203-0306
Container-title:Вулканология и сейсмология
language:
Short-container-title:Vulkanologiâ i sejsmologiâ

Author:

Kotenko T. A.¹,Smirnov S. Z.²³,Timina T. Y.²

Affiliation:

1. Institute of Volcanology and Seismology FEB RAS

2. Sobolev Institute of Geology and Mineralogy SB RAS

3. Trofimuk Institute of Petroleum Geology and Mineralogy SB RAS

Abstract

The paper provides information about the eruptive activity of the Ebeko volcano in 2022. From January 22 to June 13, phreatic explosions occurred in the crater lake caused by water seeping through the plug formed in the upper part of the magma channel and its boiling. On June 14, Vulcanian explosions began, destroying the lake. The granulometric composition of the ashes has changed in the direction of reducing the particle size. Petrographic and mineralogical-geochemical studies of tephra allow us to define this period as a phreatomagmatic eruption by the presence of fresh juvenile material. It is established that the interaction of magma with the waters of the hydrothermal system of the Ebeko volcano leads to its depletion with alkali metals and enrichment with silica. It is suggested that the formation of amorphous water-containing silica in the form of numerous separations and its subsequent dehydration may contribute to the explosive activity of the volcano.

Publisher

The Russian Academy of Sciences

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