Stratigraphy, structure and geology of Late Miocene Verkhneavachinskaya caldera with basaltic-andesitic ignimbrites at Eastern Kamchatka

Bergal‐Kuvikas, Olga; Leonov, V. P.; Rogozin, Aleksei; Bindeman, Ilya N.; Kliapitskiy, Evgeniy; Churikova, Tatiana

doi:10.3190/jgeosci.295

Cited by 6 publications

(7 citation statements)

References 33 publications

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“…The Detroit record can more readily pretend to be the most complete documented record of explosive volcanism of Kamchatka because this record consists of about 10 times more eruptions with M ∼ 7.5 than it was known before from the onshore record. On the other hand, the Detroit record cannot be considered complete because many voluminous ignimbrites of Kamchatka (e.g., Bergal‐Kuvikas et al., 2019; Bindeman et al., 2010; Portnyagin et al., 2020) left no visible tephra layer in the Detroit section. Reconstruction of a complete history of Kamchatka volcanism will require integration of all available data from on‐land of off‐shore records.…”

Section: Discussionmentioning

confidence: 99%

“…Pre-Holocene proximal pyroclastic deposits, however, have been affected by glaciations and tectonic activity and consist of complex, partially eroded and often densely vegetated successions, permitting reconstruction of only disparate fragments of the eruptive history. Therefore, terrestrial record of the late Miocene-Pleistocene explosive activity in Kamchatka includes only ∼30 dated ignimbrites (Bergal-Kuvikas et al, 2019;Bindeman et al, 2010Bindeman et al, , 2019Seligman et al, 2014) and a continuous but short (∼30 ka) tephra record from the Central Kamchatka Depression (Ponomareva et al, 2021).…”

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confidence: 99%

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A 6.2 Ma‐Long Record of Major Explosive Eruptions From the NW Pacific Volcanic Arcs Based on the Offshore Tephra Sequences on the Northern Tip of the Emperor Seamount Chain

Ponomareva,

Portnyagin,

Bubenshchikova

et al. 2023

Geochem Geophys Geosyst

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We present a continuous ∼6.2 Ma long record of explosive activity from the Northwest Pacific volcanic arcs based on a composite tephra sequence derived from Ocean Drilling Program Sites 882A and 884B, and core MD01‐2416 on the Detroit Seamount. Geochemical fingerprinting of tephra glass using major and trace element analyses and correlations of tephra layers between the three cores allowed the identification of 119 unique tephras, suggesting eruptions of magnitude (M) of 5.8–7.8. Age estimates for all the identified eruptions were obtained with the help of published and further refined age models for the studied cores, direct 40Ar/39Ar dating of four ash layers, and Bayesian age modeling. The glass compositions vary from low‐ to high‐K2O basaltic andesite to rhyolite and exhibit typical subduction‐related affinity. The majority of the tephras originated from Kamchatka, only a few tephras—from the neighboring Kuril and Aleutian arcs. The glass compositions revealed no temporal trends but made it possible to identify their source volcanic zones in Kamchatka and, in some cases, to determine their source eruptive centers. Our data indicates episodes of explosive activity recorded in the Detroit tephra sequence at ∼6,200, 5,600–5,000, 4,300–3,700 ka, and almost continuous activity since ∼3,000 ka. Within the latter episode, the most active intervals can be identified at 1,700–1,600, 1,150–1,050, and 600–50 ka. Geochemically fingerprinted and dated Detroit tephra sequence form a framework for dating and correlating diverse paleoenvironmental archives across the Northwest Pacific and for studies of geochemical evolution of the adjacent volcanic arcs.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

A 6.2 Ma‐Long Record of Major Explosive Eruptions From the NW Pacific Volcanic Arcs Based on the Offshore Tephra Sequences on the Northern Tip of the Emperor Seamount Chain

Ponomareva,

Portnyagin,

Bubenshchikova

et al. 2023

Geochem Geophys Geosyst

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“…Data was calculated on the report of 2019; c Geological formations of MPZD are based on Geological map (2000), Krohin (1954), Dirksen (2009). The boundary of Karymshina caldera and distribution of ignimbrites of Verkhnaevachinskaya caldera are illustrated using Bergal-Kuvikas et al, 2019;Leonov and Rogozin, 2007. Locations of cinder cone of Khlebalkina island and extrusive dome in Avacha bay are shown using Dmitriev and Ezhov (1977).…”

Section: Discussionmentioning

confidence: 99%

Pleistocene-Holocene Monogenetic Volcanism at Malko-Petropavlovsk Zone of Transverse Dislocations on Kamchatka: Geological Setting, Spatial, Geochemical Paticular Features and Potential Volcanic Hazards

Bergal‐Kuvikas

Bindeman²,

Чугаев

et al. 2021

Preprint

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Based on government statistical data ~80% of the local Kamchatkan population (~250 ka people) live in the major cities on the coastal line of Avacha Gulf . It is the main transport seaway to Kamchatka , and and important Asia - North America air transport corridor. The Avacha Gulf is located in the Malko-Petropavlovsk zone of transverse dislocations (MPZ) on the extension of deep transform fault on the boundary between various ly aged slabs. Most of monogenetic cinder cones chaotic distributed in relation to the trench and belong to the long-living rupture zones of MPZ. Some of the monogenetic volcanoes are parasitic cones on the slopes of Koryaksky and Avachinsky stratovolcanoes and related with their magma plumbing systems. We here present new results of the geochemical and isotopic stud ies of monogenetic volcanism in MPZ. Based on whole rock and trace element geochemistry, Sr-Nd-Pb isotopic ratios of monogenetic volcanism, magmas were shown to sample the enriched mantle source with dominance decompression melting without significant inputs of the slab`s components. Calculations of the P, T conditions suggest magma residence of monogenetic cinder cones on the Moho boundary. That correlates with the geophysical observation of crustal discontinuity under the MPZ. Monogenetic cinder cones have an active magma plumbing system because during the Holocene time were several periods of activations. Presented results show necessary install continuous monitoring of environment changing around the Avacha Gulf and more serious attention from government and science. A more detailed investigation of MPZ will help degrease potential risks of eruptions from monogenetic volcanoes for human and infrastructures.

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“…Характерно чередование базальтов повышенной щелочности с базальтами известково-щелочной серии [31]. Нижняя возрастная граница раннего этапа по палеонтологическим данным определяется поздним миоценом [5] и согласуется с новыми Ar-Ar датировками андезибазальтовых игнимбритов 5.8-5.6 млн лет [56]. Верхняя -четко не определена, но по имеющимся данным этот этап включает весь плиоцен [2], а, возможно, и ранний плейстоцен [33].…”

Section: восточная камчаткаunclassified

“…2 -позднемиоцен-плиоценовые вулканиты: позднемиоценовые базальты щапинской свиты [5]; среднемиоценовые габброиды и позднемиоценовые базальтоиды района г. Корниловской восточных отрогов Baлангинского хребта [6]; позднемиоценовые щелочные габброиды и трахидолериты Кроноцкого перешейка, р. Мал. Чажма и п-ова Камчатский Мыс [38][39][40]; позднемиоцен-плиоценовые адакиты и Nb-обогащенные базальты Восточной Камчатки [3]; андезибазальтовые и андезитовые игнимбриты (5.78-5.58 млн лет) Верхнеавачинской кальдеры [56]. б -Южная Камчатка (309 анализов): 1 -позднеплейстоцен-голоценовые (Q 3-4 ) толеитовые базальты и трахиандезиты вулк.…”

Section: обсуждение результатов исследованийunclassified

Late Miocene-Pliocene Transform Margin of Kamchatka

Ханчук

Grebennikov

2021

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Testing of the geochemical compositions of the Late Cenozoic volcanites of Kamchatka on new discriminant diagrams confirmed the idea of the existence of different geodynamic regimes at this time. It is shown that the Late Miocene (~6 Ma)-Pliocene volcanites of Eastern Kamchatka and the Central Kamchatka Depression, as well as the Late Pliocene (~3.5 Ma)-Holocene alkaline, calcareous-alkaline, and adakite volcanites of the central part of the Middle Ridge are similar to the volcanites of the transform margins of the Pacific type. At the same time, the Miocene–Holocene volcanites of Southern Kamchatka, the Miocene-Early Pliocene volcanites of the Middle Ridge, and the Pleistocene–Holocene volcanites of Eastern Kamchatka are similar to the volcanites of the convergent margins. In the central part of Kamchatka (from the coast to the Middle Ridge), at the end of the Miocene-Pliocene, during the collision of the Kronotsky terrane of the island arc and the slip of the Pacific plate, magmatic complexes typical of the transform margin were formed in this area. The geochemistry of the transform margin volcanites is due to the upwelling of the subslab asthenosphere both into the collision zone and into the zone of the volcanic arc of the Middle Ridge, after the rupture and subsequent separation of the Komandor-Kronotsky microplate slab.

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Stratigraphy, structure and geology of Late Miocene Verkhneavachinskaya caldera with basaltic-andesitic ignimbrites at Eastern Kamchatka

Cited by 6 publications

References 33 publications

A 6.2 Ma‐Long Record of Major Explosive Eruptions From the NW Pacific Volcanic Arcs Based on the Offshore Tephra Sequences on the Northern Tip of the Emperor Seamount Chain

A 6.2 Ma‐Long Record of Major Explosive Eruptions From the NW Pacific Volcanic Arcs Based on the Offshore Tephra Sequences on the Northern Tip of the Emperor Seamount Chain

Pleistocene-Holocene Monogenetic Volcanism at Malko-Petropavlovsk Zone of Transverse Dislocations on Kamchatka: Geological Setting, Spatial, Geochemical Paticular Features and Potential Volcanic Hazards

Late Miocene-Pliocene Transform Margin of Kamchatka

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