Ages of calderas, large explosive craters and active volcanoes in the Kuril-Kamchatka region, Russia

Braitseva, O A; Мелекесцев, И. В.; Пономарева, В. В.; Sulerzhitsky, L. D.

doi:10.1007/bf00300984

Cited by 62 publications

(103 citation statements)

References 10 publications

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“…This conclusion is supported by analyses of time distribution of dated Holocene collapses (Fig. 3), of which 13 occurred on 8 volcanoes between 1100 and 1900 yr BP, coinciding with a period of enhanced volcanic activity on Kamchatka (Braitseva et al, 1995). Any other time interval of similar duration gives no more than 5 collapse events on 3 volcanoes.…”

Section: Discussionmentioning

confidence: 63%

“…Both collapses took place most likely during the last glacial interstadial (30-40 ka BP) roughly at the same period as many Late Pleistocene collapse calderas (Braitseva et al, 1995). Both sector collapses likely were not followed by large explosive eruptions, so they were probably caused by factors other than magmatic activity.…”

Section: Discussionmentioning

confidence: 94%

“…4A, B). It is believed to have resulted from a single event which formed a 9 km-wide crater ∼ 30,000 14 C yr BP Braitseva et al, 1995) or ∼ 10,000 yr BP (Belousov et al, 1999). The aspect of the crater, open to the south, was controlled by a system of normal faults with vertical displacements of ∼ 500 m ( Fig.…”

Section: Volcanoes Of the Central Kamchatka Depressionmentioning

confidence: 99%

“…2 and 5). All the high volcanoes of Kliuchevskoi group were constructed during the Late Pleistocene or the Holocene (Melekestsev et al, 1974;Braitseva et al, 1995). The group's vigorous magma output during the Holocene accounts for more than half of Kamchatka's volcanic activity (Melekestsev, 1980).…”

Section: Volcanoes Of the Central Kamchatka Depressionmentioning

confidence: 99%

“…7A, B; Piip, 1956), was once a summit of Plosky Blizhny volcano (4057 a.s.l.) and was displaced likely during the caldera collapse on adjacent Plosky Dalny volcano ∼ 8600 14 C yr BP (Braitseva et al, 1995). Judging from the position of the flank vents which drained the magma before the caldera collapse (Melekestsev et al, 1974), a magma-conducting fissure zone crossed Plosky Blizhny volcano and undermined it.…”

Section: Volcanoes Of the Central Kamchatka Depressionmentioning

confidence: 99%

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

Пономарева

Мелекесцев

Dirksen

2006

Journal of Volcanology and Geothermal Research

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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 km 3 ) to catastrophic (up to 20-30 km 3 ), 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 km 3 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 km 3 ) and active Kambalny (5-10 km 3 ) 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 km 3 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.

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Section: Discussionmentioning

confidence: 63%

Section: Discussionmentioning

confidence: 94%

Section: Volcanoes Of the Central Kamchatka Depressionmentioning

confidence: 99%

Section: Volcanoes Of the Central Kamchatka Depressionmentioning

confidence: 99%

Section: Volcanoes Of the Central Kamchatka Depressionmentioning

confidence: 99%

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

Пономарева

Мелекесцев

Dirksen

2006

Journal of Volcanology and Geothermal Research

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Basic description and some notes on the evolution of seven sympatric morphs of Dolly Varden Salvelinus malma from the Lake Kronotskoe Basin

Маркевич

Есин

Anisimova

2018

Ecology and Evolution

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The study examines the basic morphological and ecological features of Dolly Varden from Lake Kronotskoe (Russia, Kamchatka). Seven valid morphs different in head proportions, feeding, timing, and place of spawning have been determined in this ecosystem. The basic morphometric characteristics clearly separate Lake Kronotskoe morphs from each other, as well as from its potential ancestor (Dolly Varden). According to CVA analysis, the most notable morphological characteristics determining the mouth position are the length of a lower jaw and rostrum. Furthermore, five of seven morphs inhabit different depth zones of the lake and feed on different food resources. Our data suggest that reproductive isolation may be maintained by temporal/spatial isolation for two morphs with lacustrine spawning, and by spatial isolation only for the rest of the morphs with riverine spawning. The sympatric diversity of the Lake Kronotskoe charrs is exceptionally wide, and there are no other examples for seven sympatric morphs of genus Salvelinus to coexist within a single ecosystem. This study puts forward a three‐step hypothetical model of charr divergence in Lake Kronotskoe as a potential ground for future studies.

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Mantle and crustal sources of magmatic activity of Klyuchevskoy and surrounding volcanoes in Kamchatka inferred from earthquake tomography

Koulakov

Shapiro

Sens‐Schönfelder

et al. 2020

Preprint

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Klyuchevskoy and surrounding volcanoes in central Kamchatka form the Northern Group of Volcanoes (NGV), which is an area of particularly diverse and intensive Pleistocene-Holocene volcanism. In this study, we present a new seismic tomographic model of the crust and uppermost mantle beneath NGV based on local earthquake data recorded by several permanent and temporary seismic networks including a large-scale experiment that was conducted in 2015-2016 by an international scientific consortium. Having an unprecedented resolution for this part of Kamchatka, the new model reveals many features associated with the present and past volcanic activity within the NGV. In the upper crust, we found several prominent high-velocity anomalies interpreted as traces of large basaltic shield volcanoes, which were hidden by more recent volcanic structures and sediments. We interpret the mantle structure to reflect asthenospheric flow up through a slab window below the Kamchatka-Aleutian junction that feeds the entire NGV. The interaction of the hot asthenospheric material with fluids released from the slab determines the particular volcanic activity within the NGV. We argue that the eastern branch of the Central Kamchatka Depression, which is associated with a prominent low-velocity anomaly in the uppermost mantle, was formed as a recent rift zone separating the NGV from the Kamchatka Eastern Ranges.

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Ages of calderas, large explosive craters and active volcanoes in the Kuril-Kamchatka region, Russia

Abstract: The ages of most of calderas,

Cited by 62 publications

References 10 publications

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

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

Basic description and some notes on the evolution of seven sympatric morphs of Dolly Varden Salvelinus malma from the Lake Kronotskoe Basin

Mantle and crustal sources of magmatic activity of Klyuchevskoy and surrounding volcanoes in Kamchatka inferred from earthquake tomography

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