High-Performance Computing of 3D Magma Dynamics, and Comparison With 2D Simulation Results

Garg, Deepak; Papale, Paolo

doi:10.3389/feart.2021.760773

Cited by 4 publications

(4 citation statements)

References 72 publications

(112 reference statements)

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“…Three dimensional setups similar to those shown here yield very similar results in terms of buoyancy‐driven convective dynamics: time scales of the gravitational instability are slightly different, but the overall dynamics follows similar patterns to those shown here (Garg & Papale, 2022). Domain size has an effect on the growth rate of Rayleigh‐Taylor instabilities (Bellman & Pennington, 1954; Montagna et al., 2015), as well as on the times over which pressure disturbances are propagated along the whole domain.…”

Section: Resultssupporting

confidence: 79%

“…The code has been recently further developed to improve numerical stability (Garg et al., 2018a), include free surface dynamics (Garg et al., 2018b), fluid‐structure interaction dynamics (Garg et al., 2021), and fully 3D dynamics (Garg & Papale, 2022). The reader interested in further details of the mathematics, the numerical methods, and the code stability and performance is addressed to such papers.…”

Section: Methodsmentioning

confidence: 99%

“…Further complexities not included in the present analysis include the presence of crystals and mushy regions, particularly in the deep magmatic system; the existence of multiple intermediate storage regions connected through complex dyke systems hardly resembling an individual, km long, vertical one as in the present idealization; the 3D nature of the real world. The role of the assumptions made here, including three-dimensionality, domain size and shape, boundary and initial conditions for the simulations, have been discussed in Papale et al (2017), Garg et al (2019), and Garg and Papale (2022).…”

Section: Overall System Dynamicsmentioning

confidence: 99%

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Dynamics of Magma Chamber Replenishment Under Buoyancy and Pressure Forces

et al. 2023

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Section: Resultssupporting

confidence: 79%

Section: Methodsmentioning

confidence: 99%

Section: Overall System Dynamicsmentioning

confidence: 99%

See 1 more Smart Citation

Dynamics of Magma Chamber Replenishment Under Buoyancy and Pressure Forces

et al. 2023

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“…The code has been recently further developed to improve numerical stability (Garg et al, 2018a), include free surface dynamics (Garg et al, 2018b), fluid-structure interaction dynamics (Garg et al, 2021), and fully 3D dynamics (Garg & Papale, 2022). The reader interested in further details of the mathematics, the numerical methods, and the code stability and performance, is addressed to such papers.…”

Section: Methodsmentioning

confidence: 99%

Dynamics of magma chamber replenishment under buoyancy and pressure forces

Longo

Garg

Papale

et al. 2022

Preprint

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Active magma chambers are periodically replenished upon a combination of buoyancy and pressure forces driving upward motion of initially deep magma. Such periodic replenishments concur to determine the chemical evolution of shallow magmas, they are often associated to volcanic unrests, and they are nearly ubiquitously found to shortly precede a volcanic eruption. Here we numerically simulate the dynamics of shallow magma chamber replenishment by systematically investigating the roles of buoyancy and pressure forces, from pure buoyancy to pure pressure conditions and across combinations of them. Our numerical results refer to volcanic systems that are not frequently erupting, for which magma at shallow level is isolated from the surface (â\eurooeclosed conduitâ\euro? volcanoes). The results depict a variety of dynamic evolutions, with the pure buoyant endmember associated with effective convection and mixing and generation of no or negative overpressure in the shallow chamber, and the pure pressure end-member translating into effective shallow pressure increase without any dynamics of magma convection associated. Mixed conditions with variable extents of buoyancy and pressure forces illustrate dynamics initially dominated by overpressure, then, over the longer term, by buoyancy forces. Results globally suggest that many shallow magmatic systems may evolve during their lifetime under the control of buoyancy forces, likely triggered by shallow magma degassing. That naturally leads to long-term stable dynamic conditions characterized by periodic replenishments of partially degassed, heavier magma by volatile-rich fresh deep magma, similar to those reconstructed from petrology of many shallow-emplaced magmatic bodies.

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A multi-methodological approach to record dynamics and timescales of the plumbing system of Zaro (Ischia Island, Italy)

Pelullo,

Chakraborty,

Montagna

et al. 2024

Contrib Mineral Petrol

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Determining the time spans of processes related to the assembly of eruptible magma at active volcanoes is fundamental to understand magma chamber dynamics and assess volcanic hazard. This information can be recorded in the chemical zoning of crystals. Nevertheless, this kind of study is still poorly employed for the active volcanoes of the Neapolitan area (Southern Italy), in particular, for Ischia island where the risk is extremely high and this information can provide the basis for probabilistic volcanic hazard assessment. For these reasons, we acquired chemical composition on clinopyroxene crystals erupted at Ischia during the Zaro eruption (6.6 ± 2.2 ka) and performed numerical simulations of the input of mafic magma into a trachytic reservoir, in order to investigate various aspects of pre-eruptive dynamics occurring at different timescales. This event emplaced a ~ 0.1 km3 lava complex, in which the main trachytic lava flows host abundant mafic to felsic enclaves. Previous petrological investigation suggested that mafic magma(s) mixed/mingled with a trachytic one, before the eruption. In this work, the clinopyroxene zoning patterns depict the growth of crystals in different magmatic environments, recording sequential changes occurred in the plumbing system before the eruption. The evolution of the plumbing system involved a hierarchy of timescales: a few hours for magma mingling caused by mafic recharge(s) and likely occurred multiple times over a decade during which a dominant magmatic environment was sustained before the eruption. Such timescales must be considered in volcanic hazard assessment at Ischia and similar active volcanoes in densely populated areas.

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High-Performance Computing of 3D Magma Dynamics, and Comparison With 2D Simulation Results

Cited by 4 publications

References 72 publications

Dynamics of Magma Chamber Replenishment Under Buoyancy and Pressure Forces

Dynamics of Magma Chamber Replenishment Under Buoyancy and Pressure Forces

Dynamics of magma chamber replenishment under buoyancy and pressure forces

A multi-methodological approach to record dynamics and timescales of the plumbing system of Zaro (Ischia Island, Italy)

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