Drift prediction of pyroclasts released through the volcanic activity of Fukutoku-Okanoba into the marine environment

Asami, Mitsufumi; Takahashi, Chiori

doi:10.1016/j.marpolbul.2022.114402

Cited by 4 publications

(2 citation statements)

References 25 publications

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“…The pumice clasts drifted and became distributed over a wide area around the islands of Japan and in many places in the East Asia, including Taiwan, Philippines, and Thailand (Yoshida et al, 2022a, b, c). The large amounts of drift pumice filled port areas and hindered vessel navigation, which led to significant economic losses (Maeno et al, 2022;Yoshida et al, 2022a, c;Asami and Takahashi, 2023). The drift pumice is geochemically homogeneous (Yoshida et al, 2022a) and similar to that generated during past eruptions in 1904, 1914, 1986, and 1992(Tsuya, 1937Yoshida et al, 1987;Kato, 1988;Nakano and Kawanabe, 1992;Sun et al, 1998), although the color and texture of the pumice are variable (Yoshida et al, 2022a).…”

Section: Introductionmentioning

confidence: 99%

The nature of the proximal volcaniclastic materials from the 2021 eruption Fukutoku-Oka-no-Ba in the Izu-Bonin arc.

Yoshida¹,

Tamura²,

Sato³

et al. 2023

Preprint

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Fukutoku-Oka-no-Ba is a submarine volcano located at 24°17.1′N/141°28.9′E in the Izu–Bonin–Mariana arc, and is one of the most active volcanoes in Japan. This volcano produced an explosive eruption in August 2021 that generated a large amount of volcaniclastic material, some of which drifted westward to Japan and the coastal area of East Asia as a pumice raft. The pumice clasts that drifted for >1000 km were mostly homogeneous and identical to those produced by past historical eruptions. The clasts have trachytic compositions (SiO2 = 61-63 mass% and Na2O+K2O = 8.6-10.0 mass%) and contain augite, plagioclase, olivine (Mg# ~65), and magnetite, along with a small number of mafic enclaves containing diopside and high-Mg olivine (Mg# ~ 92).We undertook a research cruise to investigate the proximal volcaniclastic materials by dredging. The proximal materials include pumice, weakly vesiculated lapilli, and volcanic rocks, which have trachytic composition (SiO2 contents up to 64.5 mass%). The main minerals in the proximal material are similar to those in the drift pumice, although remnants of mafic magma do not occur in the SiO2-rich samples. The compositional variations of the SiO2-rich proximal samples are due to plagioclase-dominated fractional crystallization, and the higher-SiO2 samples yielded lower temperature and pressure among the studied samples.The petrographic and geochemical characteristics of the proximal and drift ejecta from Fukutoku-Oka-no-Ba suggest the magma reservoir was stratified into two parts. The lower part experienced magma mixing with a limited volume of mafic magma, whereas the upper part underwent plagioclase-dominated fractional crystallization. The accumulation of differentiated high-SiO2 magma in the upper part of the magma reservoir might have increased the pressure in the magma conduit, which then exceeded the critical pressure required for an explosive eruption.

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Section: Introductionmentioning

confidence: 99%

The nature of the proximal volcaniclastic materials from the 2021 eruption Fukutoku-Oka-no-Ba in the Izu-Bonin arc.

Yoshida¹,

Tamura²,

Sato³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…The pumice clasts drifted and became distributed over a wide area around the islands of Japan and in many places in the East Asia, including Taiwan, Philippines, and Thailand (Yoshida, Maruya, & Kuwatani, 2022; Yoshida, Tamura, Sato, Hanyu, et al, 2022; Yoshida, Tamura, Sato, Sangmanee, et al, 2022). The large amounts of drift pumice filled port areas and hindered vessel navigation, which led to significant economic losses (Asami & Takahashi, 2023; Maeno et al, 2022; Yoshida, Tamura, Sato, Hanyu, et al, 2022; Yoshida, Maruya, & Kuwatani, 2022). The drift pumice is geochemically homogeneous (Yoshida, Tamura, Sato, Hanyu, et al, 2022) and has similar compositions to that generated during past eruptions in 1904, 1914, 1986, and 1992 (Kato, 1988; Nakano & Kawanabe, 1992; Sun et al, 1998; Tsuya, 1937; Yoshida et al, 1987), although the color and texture of the pumice are variable (Yoshida, Tamura, Sato, Hanyu, et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

The proximal volcaniclastic materials of Fukutoku‐Oka‐no‐Ba in the Izu‐Bonin arc show contrasting characteristics to the drift pumice of the 2021 eruption

Yoshida,

Tamura,

Sato

et al. 2023

Island Arc

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Fukutoku‐Oka‐no‐Ba is a submarine volcano located at 24°17.1′ N/141°28.9′ E in the Izu–Bonin arc, and is one of the most active volcanoes in Japan. This volcano produced an explosive eruption in August 2021 that generated a large amount of volcaniclastic material, some of which drifted westward to Japan and the coastal area of East Asia as a pumice raft. The pumice clasts that drifted for >1000 km were mostly homogeneous and identical to those produced by past historical eruptions. The clasts have trachytic compositions (SiO2 = 61–63 mass% and Na2O + K2O = 8.6–10.0 mass%) and contain augite, plagioclase, olivine (Mg# ~65), and magnetite, along with a small number of mafic enclaves containing diopside and high‐Mg olivine (Mg# ~ 92). We undertook a research cruise to investigate the proximal volcaniclastic materials by dredging. The proximal materials include pumice, weakly vesiculated lapilli, and volcanic blocks, which have trachytic composition (SiO2 contents up to 64.5 mass%). The main minerals in the proximal material are similar to those in the drift pumice, although remnants of mafic magma do not occur in the SiO2‐rich samples. The petrographic and geochemical characteristics of the proximal and drift ejecta from Fukutoku‐Oka‐no‐Ba suggest the magma reservoir was stratified into two parts. The major part experienced magma mixing with a limited volume of mafic magma, whereas the other part was more differentiated. The differentiated high‐SiO2 magma accumulated in the upper part of the magma reservoir and avoided the mixing with and feed of volatile from the mafic magma, then were pushed out from the volcanic vent without extensive bubbling to sunk in the proximal area.

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Simulated distributions of pumice rafts in Japan following eruptions at volcanic islands and submarine volcanoes

Nishikawa

Kuwatani

Tada

et al. 2023

Prog Earth Planet Sci

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Voluminous pumice rafts produced by the 2021 phreatomagmatic eruption of Fukutoku-Oka-no-Ba, a submarine volcano located in the Izu-Bonin Islands, reached many Japanese ports and islands, damaging fisheries and hindering marine traffic and trade. This event emphasized the necessity for governments and stakeholders to develop plans in advance and prepare disaster mitigation measures before an eruption. To investigate when and to what extent pumice might intersect trade routes and arrive at islands after future eruptions, we conducted particle tracking simulations of eruptions at major volcanic islands and submarine volcanoes near Japan using the velocity field from the ocean reanalysis dataset. Seven major volcanoes that have produced pumice rafts in the past century were selected: the submarine volcano NNE of Iriomote Island, Izu-Tobu Volcanoes, Miyakejima, Bayonnaise Rocks, Nishinoshima, Kaitoku Seamount, and Fukutoku-Oka-no-Ba. We partly reproduced the distribution of pumice arrivals recorded after the 1986 Fukutoku-Oka-no-Ba eruption, demonstrating the potential effectiveness of the simulations. We report likely pumice raft arrivals and drifting durations for the investigated eruptive scenarios, which may aid future risk assessments for pumice arrivals.

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Drift prediction of pyroclasts released through the volcanic activity of Fukutoku-Okanoba into the marine environment

Cited by 4 publications

References 25 publications

The nature of the proximal volcaniclastic materials from the 2021 eruption Fukutoku-Oka-no-Ba in the Izu-Bonin arc.

The nature of the proximal volcaniclastic materials from the 2021 eruption Fukutoku-Oka-no-Ba in the Izu-Bonin arc.

The proximal volcaniclastic materials of Fukutoku‐Oka‐no‐Ba in the Izu‐Bonin arc show contrasting characteristics to the drift pumice of the 2021 eruption

Simulated distributions of pumice rafts in Japan following eruptions at volcanic islands and submarine volcanoes

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