Relationships between magmatic properties and eruption magnitude of explosive eruptions at Japanese arc volcanoes during the last one hundred thousand years

Takeuchi, Shingo; Toshida, Kiyoshi; Miura, Daisuke; Ito, Hisatoshi; Uesawa, Shimpei

doi:10.1016/j.jvolgeores.2021.107345

Cited by 3 publications

(3 citation statements)

References 108 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, in comparison to crystal-poor magmas, crystal-rich melts are able to outgas much more easily (at lower γ) for comparable temperature, pressure, and strain rate, confirming the effusive mode of crystal-rich lava-dome emplacement and the unnecessity to invoke dominant outgassing mechanisms other than channelling [Collombet et al, 2021]. From a crystallinity point of view and regardless of melt H 2 O content and magma storage pressure, the gas-permeable nature of the 30-50 vol% crystal-bearing rhyolitic melts investigated in this study agrees with the eruptions of low magnitude reported by [Takeuchi et al, 2021] and the crystallinity-controlled effusive eruptions reported by Popa et al [2021]. Yet, the present experiments highlight the major control of an exsolved volatile phase (20-30 vol%) and low shear (γ < 2) on the permeability development, with consequences on eruptive style that may deviate from those expected from the sole consideration of crystallinity and melt H 2 O content.…”

Section: Implications For Natural Volcanic Systemssupporting

confidence: 87%

Bubble connectivity in experimentally-sheared crystal-bearing silicic melts

Daffos¹,

Martel²,

Arbaret³

et al. 2023

Comptes Rendus. Géoscience

View full text Add to dashboard Cite

show abstract

Section: Implications For Natural Volcanic Systemssupporting

confidence: 87%

Bubble connectivity in experimentally-sheared crystal-bearing silicic melts

Daffos¹,

Martel²,

Arbaret³

et al. 2023

Comptes Rendus. Géoscience

View full text Add to dashboard Cite

show abstract

“…Modal phenocryst contents can be obtained by analyzing thin section images (e.g., Cashman and Marsh, 1988;Allen and McPhie, Frontiers in Earth Science frontiersin.org 2003; Takeuchi et al, 2021). Outcrops and stratigraphic levels of the samples for the phenocryst mode composition analysis were listed in Supplementary Table S2.…”

Section: Petrographic and Mineralogical Analysismentioning

confidence: 99%

Temporal change in eruption style during the basaltic explosive An’ei eruption of the Izu-Oshima volcano, Japan: insights from stratigraphy and chemical composition analyses

Ikenaga,

Maeno,

Yasuda

2023

Front. Earth Sci.

View full text Add to dashboard Cite

Basaltic eruptions sometimes show an explosive and complex nature; thus, clarifying the sequence and controlling parameters is essential for understanding their causes. The An’ei eruption of the Izu-Oshima volcano during 1777–1792 was a complex basaltic eruption producing lava flows, pyroclastic falls, and ash plumes. We reconstructed the transition of the eruption style based on geological data combined with comparisons with data from historical documents and used chemical analyses to develop a magma plumbing model. The An’ei eruption started in August 1777 with scoria ejection. The scoria deposit was classified into Units A–C. Unit A scoria was produced by early weak explosions and more intense subsequent explosions. Unit B scoria marked a return to weak plumes before the summit eruption reached its climactic phase in November 1778 and explosively ejected Unit C scoria. Several lava flows were also effused from the foot of the scoria cone during these periods of scoria ejection. After a 5-year hiatus, the eruption ultimately shifted to persistent, weak ash ejection and pyroclastic surges. The tephra volumes of Units A, B, and C were estimated at 1.9–4.3 × 107, 0.6–4.5 × 106, and 1.3–3.2 × 107 m3, respectively. Associated column heights of 8–11, 3–10, and 9–12 km were obtained for Units A, B, and C, respectively, resulting in sub-Plinian classification. Chemical analyses have shown that the plagioclase phenocryst content increased as the eruption progressed. The transition from relatively weak activity with Strombolian and sub-Plinian explosions, caused by aphyric magma, to short-period activity with more intense sub-Plinian explosions, caused by porphyritic magma, can be explained by evacuation of magma from multiple reservoirs with different contents of plagioclase phenocrysts. Simultaneous lava flows that have different petrological features from those of the scoria eruptions also suggest multiple magma reservoirs and pathways. This view of the temporal change in eruptive style, corresponding to change in magma type, is essential for understanding the eruptive processes of large-scale basaltic eruptions of the Izu-Oshima volcano and contributes to clarifying the nature and hazards of basaltic eruptions which turn into explosive activities in general.

show abstract

“…They identified waxing and waning eruptive activity which, as a function of magma production rate, also has bearing on the eruptive style. An additional similar study also compared petrographic features with the respective eruption rate (Takeuchi et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

Sanbe volcano: Long‐term evolution of an arc magmatic system

Auer

Kamei

Endo³

2022

Island Arc

View full text Add to dashboard Cite

A suite of samples was studied that represents the major explosive eruptions of Sanbe volcano, SW Japan. We demonstrate how rate of magma flux into the Trans‐Crustal Magmatic System (TCMS) presents a major control on the type and style of the subsequently forthcoming eruptions. Erupted products can be separated into two distinct groups. An older group is characterized by highly evolved, high‐K, LILE‐rich rhyolitic magmas, showing a supressed adakitic trace element signature (otherwise characteristic for the young stratovolcanoes in the SW Japan arc) with low Ca, Sr concentrations and a negative Eu anomaly. In contrast, the younger group (dominantly of andesitic—dacitic composition) displays a strong adakitic trace element signature with characteristic steep REE profiles and high Sr concentrations. An Eu anomaly is generally lacking here. The two groups are also distinct in their petrographic features, with the early group being almost aphyric showing simple log linear crystal size distributions and homogeneous, uniform mineral chemistries. In contrast, products of the younger group show complex crystal size distributions with diverse mineral compositions and abundant disequilibrium features. Our study shows that an initial high melt‐production rate allowed dehydration melting of lower crustal rocks leading to the formation of highly evolved K‐rich magmas. These magmas intruded into the shallow crust and produced two large Plinian rhyolitic, caldera forming eruptions. Subsequently the primary magma production rate decreased and the lower crust became too refractory for additional dehydration melting by these lower volume magma batches, causing the conventional adakitic magmatism to produced several additional eruptions of smaller magnitude, mainly of Sub‐Plinian or Pelean styles.

show abstract

Relationships between magmatic properties and eruption magnitude of explosive eruptions at Japanese arc volcanoes during the last one hundred thousand years

Cited by 3 publications

References 108 publications

Bubble connectivity in experimentally-sheared crystal-bearing silicic melts

Bubble connectivity in experimentally-sheared crystal-bearing silicic melts

Temporal change in eruption style during the basaltic explosive An’ei eruption of the Izu-Oshima volcano, Japan: insights from stratigraphy and chemical composition analyses

Sanbe volcano: Long‐term evolution of an arc magmatic system

Contact Info

Product

Resources

About