A petrological and geochemical study on time-series samples from Klyuchevskoy volcano, Kamchatka arc

Bergal‐Kuvikas, Olga; Nakagawa, Mitsuhiro; Kuritani, Takeshi; Muravyev, Yaroslav D.; Malik, Nataliya; Klimenko, Elena; Amma-Miyasaka, Mizuho; Matsumoto, Akiko; Shimada, Shunjiro

doi:10.1007/s00410-017-1347-z

Cited by 20 publications

(10 citation statements)

References 54 publications

(76 reference statements)

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“…1 b). Even more indicative is the fact that this decrease was also associated with an evident geochemical change in the products erupted by Klyuchevskoy after 1960 42 (a few years after the unrest of Bezymianny), which has been ascribed to the injection of new type of primary magma that was not produced beneath the volcano previously.…”

Section: Interactions Between Klyuchevskoy Bezymianny and Tolbachikmentioning

confidence: 96%

“…On its way to the surface, the magma is stored at a depth of 15–25 km and then transported further upwards to a shallow (3–5 km deep) peripheral reservoir 24 . During ascent, the magma evolves from high-Mg low-Al basalt to low-Mg high-Al basaltic andesite 42 , making it different from the eruptive products of the other active KVG volcanoes 39 . Eventually, before the conduit reaches the summit crater, numerous radial dikes depart and feed eruptions at the mid- and lower-volcano flanks 21 , 40 .…”

Section: The Klyuchevskoy Volcanic Group (Kvg)mentioning

confidence: 99%

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Thermal remote sensing reveals communication between volcanoes of the Klyuchevskoy Volcanic Group

Coppola

Laiolo

Massimetti

et al. 2021

Sci Rep

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Volcanoes are traditionally considered isolated with an activity that is mostly independent of the surrounding, with few eruptions only (< 2%) associated with a tectonic earthquake trigger. Evidence is now increasing that volcanoes forming clusters of eruptive centers may simultaneously erupt, show unrest, or even shut-down activity. Using infrared satellite data, we detail 20 years of eruptive activity (2000–2020) at Klyuchevskoy, Bezymianny, and Tolbachik, the three active volcanoes of the Klyuchevskoy Volcanic Group (KVG), Kamchatka. We show that the neighboring volcanoes exhibit multiple and reciprocal interactions on different timescales that unravel the magmatic system’s complexity below the KVG. Klyuchevskoy and Bezymianny volcanoes show correlated activity with time-predictable and quasiperiodic behaviors, respectively. This is consistent with magma accumulation and discharge dynamics at both volcanoes, typical of steady-state volcanism. However, Tolbachik volcano can interrupt this steady-state regime and modify the magma output rate of its neighbors for several years. We suggest that below the KVG the transfer of magma at crustal level is modulated by the presence of three distinct but hydraulically connected plumbing systems. Similar complex interactions may occur at other volcanic groups and must be considered to evaluate the hazard of grouped volcanoes.

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Section: Interactions Between Klyuchevskoy Bezymianny and Tolbachikmentioning

confidence: 96%

Section: The Klyuchevskoy Volcanic Group (Kvg)mentioning

confidence: 99%

Thermal remote sensing reveals communication between volcanoes of the Klyuchevskoy Volcanic Group

Coppola

Laiolo

Massimetti

et al. 2021

Sci Rep

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“…In summary, the geochemical difference between the southern Yanbian and northern LHZR mafic intrusions can be interpreted as a result of input of compositionally distinct subducted sediments into the mantle source through the arc magmatic belt. Such geochemical variations of arc basalts can also be found in modern subduction zones, for example, the Kamchatka‐Honshu‐Izu‐Bonin‐Mariana arc systems in the western Pacific (e.g., Bergal‐Kuvikas et al, ; Elliott et al, ; Freymuth et al, ; Hoang et al, ). The continental arc mafic rocks (e.g., in the Kamchatka and Honshu arcs) derived from a mantle wedge enriched by addition of predominantly subducted terrigenous sediments also have higher Th/La and Th/Yb and lower Lu/Hf ratios than those oceanic arc basalts (e.g., in the Izu‐Bonin‐Mariana arcs), which originate from a mantle source metasomatized by subducted pelagic sediments (Figures c and d).…”

Section: Discussionmentioning

confidence: 94%

Roles of Subducted Pelagic and Terrigenous Sediments in Early Jurassic Mafic Magmatism in NE China: Constraints on the Architecture of Paleo‐Pacific Subduction Zone

Zhao

Guo

et al. 2019

JGR Solid Earth

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The role of subducted sediments in arc magmatism has been widely documented. However, identifying the sedimentary provenance (e.g., pelagic vs. terrigenous) input in subduction systems is difficult because of the wide compositional range of sedimentary components and the complex magmatic evolution of arcs. Here we report zircon U‐Pb‐Hf‐O isotopes and whole‐rock elemental and Sr‐Nd‐Hf isotopic compositions of four Early Jurassic subduction‐related mafic intrusions from the Yanbian area, NE China. These rocks show typical trace element and isotopic features of arc magmas. In combination with the published data, we discover two distinct elemental‐isotopic arrays of the Early Jurassic mafic rocks across the arc magmatic belt. Such geochemical variations are mainly attributed to variable subducted sediment input into the mantle wedge instead of crustal contamination or assimilation during magmatic evolution. The mantle source for the southern Yanbian mafic rocks was enriched by addition of a crustal component dominated by terrigenous sediments, whereas that for the northern Lesser Hinggan‐Zhangguangcai Range, mafic rocks was modified by another crustal component comprising mainly pelagic sediments. The results can be best interpreted if the southern part was a continental arc as opposed to an oceanic arc in the north, which is analogous to the modern Kamchatka‐Honshu‐Izu‐Bonin‐Mariana arc systems in the western Pacific. Our reconstructed architecture, based mainly on the geochemical data, further suggests that the Khanka‐Jiamusi‐Buleya Massif was probably sinistrally and northwardly displaced to the present position after Mesozoic subduction of the Paleo‐Pacific Ocean.

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“…In order to estimate magma compositions in the deep magma reservoir we used “Petrolog” software 45 . Reverse crystallization from a more evolved magma (sample 12KY-108-1, 1987 AD eruption 46 ) was performed. The starting pressure is set to atmospheric level and magma is H 2 O-saturated.…”

Section: Methodsmentioning

confidence: 99%

Deep long period volcanic earthquakes generated by degassing of volatile-rich basaltic magmas

et al. 2020

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Deep long-period (DLP) earthquakes observed beneath active volcanoes are sometimes considered as precursors to eruptions. Their origin remains, however, unclear. Here, we present a possible DLP generating mechanism related to the rapid growth of gas bubbles in response to the slow decompression of over-saturated magma. For certain values of the gas and bubble content, the elastic deformation of surrounding rocks forced by the expanding bubbly magma can be fast enough to generate seismic waves. We show that amplitudes and frequencies of DLP earthquakes observed beneath the Klyuchevskoy volcano (Kamchatka, Russia) can be predicted by our model when considering pressure changes of~10 7 Pa in a volume of~10 3-10 4 m 3 and realistic magma compositions. Our results show importance of the deep degassing in the generation of volcanic seismicity and suggest that the DLP swarms beneath active volcanoes might be related to the pulses of volatile-rich basaltic magmas rising from the mantle.

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A petrological and geochemical study on time-series samples from Klyuchevskoy volcano, Kamchatka arc

Cited by 20 publications

References 54 publications

Thermal remote sensing reveals communication between volcanoes of the Klyuchevskoy Volcanic Group

Thermal remote sensing reveals communication between volcanoes of the Klyuchevskoy Volcanic Group

Roles of Subducted Pelagic and Terrigenous Sediments in Early Jurassic Mafic Magmatism in NE China: Constraints on the Architecture of Paleo‐Pacific Subduction Zone

Deep long period volcanic earthquakes generated by degassing of volatile-rich basaltic magmas

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