Fragmentation Processes During Strombolian Explosions Revealed Using Particle Size Distribution Mapping

Colò, L.; Ripepe, Maurizio; Gurioli, Lucia; Harris, Andrew

doi:10.3389/feart.2020.00356

Cited by 4 publications

(1 citation statement)

References 49 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Plastic sheets (e.g. Harris et al 2013;Colo' et al 2020), preexisting cleaned surfaces (e.g., Houghton et al 2013) or buckets (e.g. Yoshimoto et al 2005;Swanson et al 2009;Bustillos et al 2016), have been used to collect sufficient material (within known surface areas) to estimate the magnitude of the event through the mass load per unit area and to obtain a sufficient number of clasts for chemical and textural characterization.…”

Section: Sampling Pyroclastic Deposits For Particle Size Morphologies Surface Features and Internal Textures (Standard)mentioning

confidence: 99%

Standardized analysis of juvenile pyroclasts in comparative studies of primary magma fragmentation; 1. Overview and workflow

et al. 2021

Self Cite

View full text Add to dashboard Cite

Juvenile pyroclasts, especially in the ash size range, provide important information on primary fragmentation processes, i.e. initial explosive magma fragmentation, and on the state of the magma both prior to and at the point of fragmentation and quenching. There exists an extensive body of literature focusing on the quantification of juvenile particle morphology (shape), internal textures and surface features spanning several decades, however a standardized method has yet to emerge for comparative studies. No community-wide consensus currently exists (i) regarding the most representative size fraction(s) to be examined, (ii) on sample preparation procedures (such as whether to use whole particle silhouettes or 2D cross-sections), (iii) on imaging techniques and image acquisition parameters, or (iv) on the optimal morphometric parameters to measure. Lack of a standardized method precludes robust comparison between different studies and laboratories. We propose here a preliminary "best practices" and workflow for characterization of juvenile pyroclasts, for comparative studies of primary fragmentation. If the community follows such a standardized method, it will become possible to accumulate a large volume of consistent data on juvenile pyroclasts from a range of eruption styles, fragmentation mechanisms, and magma compositions. This will ultimately allow deeper insights into the full panoply of magma-to-pyroclast processes that drive particle-producing volcanic eruptions. One or more "fragmentation diagrams" may eventually be developed to allow different types of magmatic and phreatomagmatic explosive eruptions to be distinguished based on their products.

show abstract

Section: Sampling Pyroclastic Deposits For Particle Size Morphologies Surface Features and Internal Textures (Standard)mentioning

confidence: 99%

Standardized analysis of juvenile pyroclasts in comparative studies of primary magma fragmentation; 1. Overview and workflow

et al. 2021

Self Cite

View full text Add to dashboard Cite

show abstract

Fragmentation behavior of young pyroclasts from Mt. Pelée, Martinique

Huebsch,

Kueppers,

Carazzo

et al. 2023

Bull Volcanol

View full text Add to dashboard Cite

The stratovolcano Mt. Pelée, Martinique, exhibits eruptive styles ranging from dome formation to sustained, highly violent explosive activity. Historical eruptions have produced lava domes and pyroclastic density currents, collectively termed Peléan activity. In pre-colonial times, several Plinian eruptions took place. Here, we explore physical controls on the proportions of fine particles produced—i.e., the fragmentation efficiency—during primary fragmentation. Samples were collected from ignimbrites from the 1929–1932 and 1902–1905 Peléan eruptions and the P1 (1300 CE), P2 (280 CE), and P3 (79 CE) Plinian eruptions. All samples are andesitic in bulk composition and contain a rhyolitic groundmass glass. The Peléan materials are more crystalline and less porous than their Plinian counterparts, a consequence of more extensive outgassing during dome formation. Representative blocks were cored and experimentally fragmented following rapid decompression (> 1 GPa·s−1 from initial pressure between 5 and 20 MPa). Dry sieving allowed for determining grain size distributions, from which the fractal dimensions, Df, were calculated as a quantification of fragmentation efficiency. Our results indicate different behaviors for Peléan and Plinian samples. While fragmentation efficiency is positively correlated with applied potential energy for Peléan samples, this relationship is not observed for the Plinian samples, possibly due to syn-fragmentation gas escape above a certain porosity. The rapid decompression experiments were designed to minimize secondary fragmentation by shear along the walls or impact while preserving the entirety of produced materials. Thus, our experimental grainsize data are physically linked to sample textures and overpressure. By comparison with natural pyroclastic products—commonly incompletely preserved—we can approach quantitatively constraining the energetic conditions underlying individual eruptions.

show abstract

Clustering-enhanced Lattice discrete particle modeling for quasi-brittle fracture and fragmentation analysis

Lyu,

Troemner,

Lale

et al. 2024

Comput Mech

View full text Add to dashboard Cite

Fragmentation Processes During Strombolian Explosions Revealed Using Particle Size Distribution Mapping

Cited by 4 publications

References 49 publications

Standardized analysis of juvenile pyroclasts in comparative studies of primary magma fragmentation; 1. Overview and workflow

Standardized analysis of juvenile pyroclasts in comparative studies of primary magma fragmentation; 1. Overview and workflow

Fragmentation behavior of young pyroclasts from Mt. Pelée, Martinique

Clustering-enhanced Lattice discrete particle modeling for quasi-brittle fracture and fragmentation analysis

Contact Info

Product

Resources

About