Garnet petrochronology reveals the lifetime and dynamics of phonolitic magma chambers at Somma-Vesuvius

Wotzlaw, Jörn‐Frederik; Bastian, Lena; Guillong, Marcel; Forni, Francesca; Laurent, Oscar; Neukampf, Julia; Sulpizio, Roberto; Chelle-Michou, Cyril

doi:10.1126/sciadv.abk2184

Cited by 2 publications

(2 citation statements)

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“…The continuous activation of the melt floats up and down the rheological locking window. In this process, the magma continuously differentiates, changes in composition, and finally ejects from the surface in the form of highly differentiated magma (Wotzlaw et al, 2022). The pulsed volcanic eruption state underwent during this period indicates underground magma chamber activity reflected on the surface.…”

Section: Possible Cause Of Volcanic-sedimentary Rhythm-dynamic Evolut...mentioning

confidence: 99%

“…No qualitative and quantitative studies on the dynamic evolution process of the near-surface magmatic chambers have been conducted. Previous studies have shown that the dynamic evolution process of the magma chamber have a certain rhythm (Hofmann, 2012;Wotzlaw et al, 2022), by using time series signal analysis technology to correlate the response of volcanic accumulation rhythm to volcanic eruption dynamics comprehensively.…”

Section: Introductionmentioning

confidence: 99%

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Early Cretaceous Volcanic Edifice Activity in the Sulu Orogenic Belt: Evidences From Volcanic-Sedimentary Rhythm Characteristics in Lingshan Island, Eastern Shandong Province, China

et al. 2022

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A rhyolitic tuff-mudstone interbedded rock outcrop with a good rhythm is found in the Yangjiaodong area of Lingshan Island, eastern Shandong Province. The volcanic eruption dynamics process was investigated by using the rhythm of volcanic accumulation method. Combined with the geologic setting of the study area, the parameter deposition rate is 6.5 m/Ma, and the mudstone compaction factor is 0.3 because the study area is the Ri-Qing-Wei Basin, which is the volcanic back-arc basin with insufficient source supply. Based on this, the time span of the analyzed sample was calculated to be 2.24 Ma, which represents the duration of this eruption event. We used software called Acycle to finish this research. The result shows cyclicity of 2.296, 5.78, 8.475, and 15.625 kyr and the scales of 2.17, 2.94, 3.12, and 18.87 m repeatability. Considering that magma eruption is affected by changing melt conditions, the crystallinity, water content, temperature, and pressure are comprehensively considered “activation conditions” to predict the dynamic process within the near-surface magma chamber, which is characterized using a pulsed volcanic eruption model.

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Section: Possible Cause Of Volcanic-sedimentary Rhythm-dynamic Evolut...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Early Cretaceous Volcanic Edifice Activity in the Sulu Orogenic Belt: Evidences From Volcanic-Sedimentary Rhythm Characteristics in Lingshan Island, Eastern Shandong Province, China

et al. 2022

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Magma accumulation underneath Laacher See volcano from detrital zircon in modern streams

Schmitt

Gerdes

et al. 2022

JGS

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The detrital zircon grains from two catchments in the East Eifel Volcanic Field consist of crystals sourced from proximal deposits of Quaternary trachytic–phonolitic volcanic centres, Hocheifel Paleogene trachytic rocks and the Paleozoic basement. The outcrop patterns indicate the derivation of a significant detrital zircon population from deposits of the c. 13 ka Lower and Upper Laacher See Tephra. Intercalated Middle Laacher See Tephra, consisting of valley-filling ignimbrites, by contrast, is a minor zircon source despite thick ignimbrite deposits in one of the catchments. This reflects zircon undersaturation in the hotter and less evolved phonolite tapped from deeper parts of the magma reservoir as the eruption unfolded, as well as fewer antecrysts recycled from the plutonic carapace. A previously unrecognized zircon age population of c. 63 ka, mostly derived from Lower Laacher See Tephra, marks the onset of the presence of evolved magma at the top of the reservoir. Correlative Hf and O isotopic analysis reveals significant crustal interactions during phonolite differentiation in a shallow reservoir, with the assimilation of cogenetic, but hydrothermally modified, plutonic margins. Raman spectra indicate that magmatically heated crustal zircon xenocrysts are absent. Detrital zircon can thus provide more integrated insights into the evolution of Quaternary magma systems than the punctuated sampling of volcanic or cogenetic plutonic rocks. Supplementary material: Data tables presenting U–Th, U–Pb, O–Hf and Raman geochronology results are available at https://doi.org/10.6084/m9.figshare.c.6123823

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Garnet petrochronology reveals the lifetime and dynamics of phonolitic magma chambers at Somma-Vesuvius

Abstract: Magma chambers feeding hazardous Plinian eruptions of Somma-Vesuvius have been present throughout most of the volcano’s lifetime.

Cited by 2 publications

References 99 publications

Early Cretaceous Volcanic Edifice Activity in the Sulu Orogenic Belt: Evidences From Volcanic-Sedimentary Rhythm Characteristics in Lingshan Island, Eastern Shandong Province, China

Early Cretaceous Volcanic Edifice Activity in the Sulu Orogenic Belt: Evidences From Volcanic-Sedimentary Rhythm Characteristics in Lingshan Island, Eastern Shandong Province, China

Magma accumulation underneath Laacher See volcano from detrital zircon in modern streams

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