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Sector collapses and large landslides on Late Pleistocene–Holocene volcanoes in Kamchatka, Russia

Ponomareva Vera V., Melekestsev Ivan V., Dirksen Oleg V. (2006) Sector collapses and large landslides on Late Pleistocene–Holocene volcanoes in Kamchatka, Russia // Journal of Volcanology and Geothermal Research. Vol. 158, No. 1-2. pp. 117-138. doi: 10.1016/j.jvolgeores.2006.04.016.

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Abstract

On Kamchatka, detailed geologic and geomorphologic mapping of young volcanic terrains and observations on historical eruptions reveal that landslides of various scales, from small (0.001 km3) to catastrophic (up to 20–30 km3), are widespread. Moreover, these processes are among the most effective and most rapid geomorphic agents. Of 30 recently active Kamchatka volcanoes, at least 18 have experienced sector collapses, some of them repetitively. The largest sector collapses identified so far on Kamchatka volcanoes, with volumes of 20–30 km3 of resulting debris-avalanche deposits, occurred at Shiveluch and Avachinsky volcanoes in the Late Pleistocene. During the last 10,000 yr the most voluminous sector collapses have occurred on extinct Kamen' (4–6 km3) and active Kambalny (5–10 km3) volcanoes. The largest number of repetitive debris avalanches (> 10 during just the Holocene) has occurred at Shiveluch volcano. Landslides from the volcanoes cut by ring-faults of the large collapse calderas were ubiquitous. Large failures have happened on both mafic and silicic volcanoes, mostly related to volcanic activity. Orientation of collapse craters is controlled by local tectonic stress fields rather than regional fault systems. Specific features of some debris avalanche deposits are toreva blocks — huge almost intact fragments of volcanic edifices involved in the failure; some have been erroneously mapped as individual volcanoes. One of the largest toreva blocks is Mt. Monastyr' — a ∼ 2 km3 piece of Avachinsky Somma involved in a major sector collapse 30–40 ka BP. Long-term forecast of sector collapses on Kliuchevskoi, Koriaksky, Young Cone of Avachinsky and some other volcanoes highlights the importance of closer studies of their structure and stability.
Item Type: Article
Title: Sector collapses and large landslides on Late Pleistocene–Holocene volcanoes in Kamchatka, Russia
Language: English
Journal or Publication Title: Journal of Volcanology and Geothermal Research
ISSN Print: 03770273
Uncontrolled Keywords: volcano; sector collapse; landslide; debris avalanche; Kamchatka
Subjects: 3 State scientific and technical information rubricator (ГРНТИ) > 38 ГЕОЛОГИЯ > 38.37 Петрография > 38.37.25 Вулканология
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Bakening
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Avachinsky
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Diky Greben
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Gamchen
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Kambalny
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Kamen
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Khodutka
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Komarov
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Koryaksky
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Bezymianny
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Mutnovsky
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Opala
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Ostry Tolbachik
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Plosky Tolbachik
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Sheveluch
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Spokoiny
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Srednii
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Taunshits
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Ushkovsky
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Vilyuchinsky
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Vysoky
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Klyuchevskoy
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Zarechny
1 Volcanoes > 1.1 Volcanoes of the Kurile-Kamchatka Region > 1.1.1 Kamchatka > Zimina
Depositing User: С.Э. Васильев
Date Deposited: 18 Nov 2013 01:57
Last Modified: 09 Jun 2021 03:13
URI: http://repo.kscnet.ru/id/eprint/1052

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