K–Ar ages of lavas from the pre-caldera stage, Towada volcano, Northeast Japan

崇, 工藤

doi:10.9795/bullgsj.67.209

Cited by 6 publications

(2 citation statements)

References 10 publications

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“…(2007), Ito et al. (2017), and Kudo (2016). Each major eruptive event identified in the stratigraphy was classified as an eruptive episode with an alphabetic symbol from top to bottom (Hayakawa, 1985).…”

Section: Geological Background At Towada Volcanomentioning

confidence: 97%

“…According to Hayakawa (1985), the volcanic activity of Towada volcano can be divided into three stages: pre-caldera (220-61 ka), caldera-forming (61-15.5 ka), and post-caldera (<15.5 ka). These ages were cited from Horiuchi et al (2007), Ito et al (2017), and Kudo (2016). Each major eruptive event identified in the stratigraphy was classified as an eruptive episode with an alphabetic symbol from top to bottom (Hayakawa, 1985).…”

Section: Eruptive and Magmatic Historymentioning

confidence: 99%

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Experimental Constraints on Magma Storage Conditions of Two Caldera‐Forming Eruptions at Towada Volcano, Japan

2022

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Large-scale caldera-forming eruptions can occur in time intervals of tens of thousands to hundreds of thousands of years and discharge more than ∼10 km 3 dense rock equivalent (DRE) magmas, severely damaging infrastructure and threatening human populations. Because these eruptions require a substantial volume of accumulated silicic magma in the crust, locating a large eruptible magma body using geophysical techniques such as seismic tomography, magnetotellurics (MT), and gravimetry is fundamentally important for assessing and mitigating the risks of future serious volcanic hazards. In particular, the depth (i.e., pressure) of magma storage is an important factor that affects the growth of eruptible magma chambers (Huber et al., 2019). It can also be a fundamental parameter for modeling and interpreting the surface displacement relevant to the evolution of huge magmatic systems (Townsend, 2022;Wasser et al., 2021;Weber & Castro, 2017). However, geophysical observations fail to detect large melt-dominated magma bodies beneath the active volcanic systems; most of the observed anomalies are interpreted as uneruptible mushy zones with ≤50% melt (Lees, 2007;Pritchard & Gregg, 2016). Advances in understanding the timescale of magma accumulation have shown that the eruptible

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Section: Geological Background At Towada Volcanomentioning

confidence: 97%

Section: Eruptive and Magmatic Historymentioning

confidence: 99%

Experimental Constraints on Magma Storage Conditions of Two Caldera‐Forming Eruptions at Towada Volcano, Japan

2022

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Newly identified small vulcanian eruptions during the caldera-forming stage of Towada Volcano, Northeast Japan

Kudo

2024

Journal of Volcanology and Geothermal Research

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Geology and Volcanic History of Hachimandake Volcanic Group, the East of Hakkoda Caldera, Northeast Japan

Kudo

Danhara²,

Iwano³

et al. 2020

Journal of Geography(Chigaku Zasshi)

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The stratigraphy and spatio-temporal distribution of the Early Pleistocene volcanic rocks in the east of Hakkoda Caldera, Northeast Japan were revealed. The Hachimandake Volcanic Group (HVG) was newly distinguished in this area. Volcanic activity of the HVG occurred during 2.5⊖1.4 Ma. Basaltic andesite magma erupted from several eruptive centers and formed several small volcanic bodies in the east of the present Hakkoda Caldera. Volcanic activity of the HVG is characterized by repeated outflows of basaltic andesite lava flows, each several meters thick. Volcanic activity of the HVG was notably smaller than that of Minami-and Kita-Hakkoda Volcanic Groups from 1.1 Ma to the present. Dacite to rhyolite pyroclastic flows were found to have occurred simultaneously during HVG activity. Those source vents are unknown.

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K–Ar ages of lavas from the pre-caldera stage, Towada volcano, Northeast Japan

Cited by 6 publications

References 10 publications

Experimental Constraints on Magma Storage Conditions of Two Caldera‐Forming Eruptions at Towada Volcano, Japan

Experimental Constraints on Magma Storage Conditions of Two Caldera‐Forming Eruptions at Towada Volcano, Japan

Newly identified small vulcanian eruptions during the caldera-forming stage of Towada Volcano, Northeast Japan

Geology and Volcanic History of Hachimandake Volcanic Group, the East of Hakkoda Caldera, Northeast Japan

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