All Outputs (98)

A reappraisal of explosive–effusive silicic eruption dynamics: syn-eruptive assembly of lava from the products of cryptic fragmentation (2022)
Journal Article
Wadsworth, F. B., Llewellin, E. W., Castro, J. M., Tuffen, H., Schipper, C. I., Gardner, J. E., …Whattam, J. (2022). A reappraisal of explosive–effusive silicic eruption dynamics: syn-eruptive assembly of lava from the products of cryptic fragmentation. Journal of Volcanology and Geothermal Research, 432, https://doi.org/10.1016/j.jvolgeores.2022.107672

Silicic volcanic eruptions range in style from gently effusive to highly explosive, and may switch style unpredictably during a single eruption. Direct observations of subaerial rhyolitic eruptions (Chaiten 2008, Cordón Caulle 2011–2012, Chile) chall... Read More about A reappraisal of explosive–effusive silicic eruption dynamics: syn-eruptive assembly of lava from the products of cryptic fragmentation.

The Influence of Grain Size Distribution on Mechanical Compaction and Compaction Localization in Porous Rocks (2022)
Journal Article
Carbillet, L., Heap, M. J., Baud, P., Wadsworth, F. B., & Reuschlé, T. (2022). The Influence of Grain Size Distribution on Mechanical Compaction and Compaction Localization in Porous Rocks. Journal of Geophysical Research. Solid Earth, 127(11), https://doi.org/10.1029/2022jb025216

The modes of formation of clastic rocks result in a wide variety of microstructures, from poorly-sorted heterogeneous rocks to well-sorted and nominally homogeneous rocks. The mechanical behavior and failure mode of clastic rocks is known to vary wit... Read More about The Influence of Grain Size Distribution on Mechanical Compaction and Compaction Localization in Porous Rocks.

The Evolution of Paleo-Porosity in Basalts: Reversing Pore-Filling Mechanisms Using X-Ray Computed Tomography (2022)
Journal Article
Macente, A., Dobson, K., MacDonald, J., Wadsworth, F., & Vasseur, J. (2022). The Evolution of Paleo-Porosity in Basalts: Reversing Pore-Filling Mechanisms Using X-Ray Computed Tomography. Transport in Porous Media, 145(3), https://doi.org/10.1007/s11242-022-01869-2

Often carrying a high-volume fraction of vesicles, basaltic rocks can be an important reservoir horizon in petroleum systems, and are considered an excellent candidate for CO2 storage by in situ mineral trapping. The frequency of amygdaloidal basalts... Read More about The Evolution of Paleo-Porosity in Basalts: Reversing Pore-Filling Mechanisms Using X-Ray Computed Tomography.

In-conduit capture of sub-micron volcanic ash particles via turbophoresis and sintering (2022)
Journal Article
Farquharson, J. I., Tuffen, H., Wadsworth, F. B., Castro, J. M., Unwin, H., & Schipper, C. I. (2022). In-conduit capture of sub-micron volcanic ash particles via turbophoresis and sintering. Nature Communications, 13, Article 4713. https://doi.org/10.1038/s41467-022-32522-7

Ash emission in explosive silicic eruptions can have widespread impacts for human health, agriculture, infrastructure, and aviation. Estimates of the total grainsize distribution (TGSD) generated during explosive magma fragmentation underpins eruptio... Read More about In-conduit capture of sub-micron volcanic ash particles via turbophoresis and sintering.

Bubble rise in molten glasses and silicate melts during heating and cooling cycles (2022)
Journal Article
Jackson, L. E., Wadsworth, F. B., Mitchell, J., Rennie, C., Llewellin, E. W., Hess, K., & Dingwell, D. B. (2022). Bubble rise in molten glasses and silicate melts during heating and cooling cycles. Journal of the American Ceramic Society, 105(12), 7238-7253. https://doi.org/10.1111/jace.18680

The Hadamard–Rybczynski equation describes the steady-state buoyant rise velocity of an unconfined spherical bubble in a viscous liquid. This solution has been experimentally validated for the case where the liquid viscosity is held constant. Here, w... Read More about Bubble rise in molten glasses and silicate melts during heating and cooling cycles.

Variation of plagioclase shape with size in intermediate magmas: a window into incipient plagioclase crystallisation (2022)
Journal Article
Mangler, M. F., Humphreys, M. C., Wadsowrth, F. B., Iveson, A. A., & Higgins, M. D. (2022). Variation of plagioclase shape with size in intermediate magmas: a window into incipient plagioclase crystallisation. Contributions to Mineralogy and Petrology, 177(6), Article 64. https://doi.org/10.1007/s00410-022-01922-9

Volcanic rocks commonly display complex textures acquired both in the magma reservoir and during ascent to the surface. While variations in mineral compositions, sizes and number densities are routinely analysed to reconstruct pre-eruptive magmatic h... Read More about Variation of plagioclase shape with size in intermediate magmas: a window into incipient plagioclase crystallisation.

The Permeability of Porous Volcanic Rock Through the Brittle‐Ductile Transition (2022)
Journal Article
Heap, M. J., Meyer, G. G., Noël, C., Wadsworth, F. B., Baud, P., & Violay, M. E. (2022). The Permeability of Porous Volcanic Rock Through the Brittle‐Ductile Transition. Journal of Geophysical Research. Solid Earth, 127(6), https://doi.org/10.1029/2022jb024600

The permeability of volcanic rock controls the distribution of pore fluids and pore fluid pressure within a volcanic edifice, and is therefore considered to influence eruptive style and volcano deformation. We measured the porosity and permeability o... Read More about The Permeability of Porous Volcanic Rock Through the Brittle‐Ductile Transition.

Interparticle and Brownian forces controlling particle aggregation and rheology of silicate melts containing platinum-group element particles (2022)
Journal Article
Pereira, L., Vasseur, J., Wadsworth, F. B., Trixler, F., & Dingwell, D. B. (2022). Interparticle and Brownian forces controlling particle aggregation and rheology of silicate melts containing platinum-group element particles. Scientific Reports, 12(1), Article 9226. https://doi.org/10.1038/s41598-022-12948-1

We study the rheology of silicate melts containing platinum-group element (PGE) particles. They exhibit a shear-thinning behaviour, an intense aggregation tendency, and an anomalously high apparent viscosity in the low shear rate limit, even at very... Read More about Interparticle and Brownian forces controlling particle aggregation and rheology of silicate melts containing platinum-group element particles.

Crowd-sourcing observations of volcanic eruptions during the 2021 Fagradalsfjall and Cumbre Vieja events (2022)
Journal Article
Wadsworth, F. B., Llewellin, E. W., Farquharson, J. I., Gillies, J. K., Loisel, A., Frey, L., …Santabárbara, A. P. (2022). Crowd-sourcing observations of volcanic eruptions during the 2021 Fagradalsfjall and Cumbre Vieja events. Nature Communications, 13(1), https://doi.org/10.1038/s41467-022-30333-4

The Fagradalsfjall1 and Cumbre Vieja eruptions were spectacular and, in the case of Cumbre Vieja, highly destructive. Over their course, the eruptions waxed and waned, fed lava flows, caused numerous felt earthquakes and explosions, localized from cr... Read More about Crowd-sourcing observations of volcanic eruptions during the 2021 Fagradalsfjall and Cumbre Vieja events.

Universal scaling for the permeability of random packs of overlapping and nonoverlapping particles (2022)
Journal Article
Vasseur, J., Wadsworth, F. B., Bretagne, E., & Dingwell, D. B. (2022). Universal scaling for the permeability of random packs of overlapping and nonoverlapping particles. Physical Review E, 105(4), Article L043301. https://doi.org/10.1103/physreve.105.l043301

Constraining fluid permeability in porous media is central to a wide range of theoretical, industrial, and natural processes. In this Letter, we validate a scaling for fluid permeability in random and lattice packs of spheres and show that the permea... Read More about Universal scaling for the permeability of random packs of overlapping and nonoverlapping particles.

Vesiculation of Rhyolitic Melts Under Oscillatory Pressure (2022)
Journal Article
Seropian, G., Kennedy, B. M., Kendrick, J. E., Lavallée, Y., Nichols, A. R., von Aulock, F. W., …Wadsworth, F. B. (2022). Vesiculation of Rhyolitic Melts Under Oscillatory Pressure. Frontiers in Earth Science, 10, Article 812311. https://doi.org/10.3389/feart.2022.812311

Magma ascending in the Earth’s crust can undergo oscillations in pressure, from ultra-low frequency changes associated with tectonics, to relatively higher frequency oscillations associated with seismicity. Seismic waves travelling through shallow ma... Read More about Vesiculation of Rhyolitic Melts Under Oscillatory Pressure.

Supereruption doublet at a climate transition (2021)
Journal Article
Paine, A. R., Wadsworth, F. B., & Baldini, J. U. (2021). Supereruption doublet at a climate transition. Communications Earth & Environment, 2(1), Article 219. https://doi.org/10.1038/s43247-021-00293-6

The force required to operate the plunger on a French press (2021)
Journal Article
Wadsworth, F. B., Vossen, C. E., Heap, M. J., Kushnir, A., Farquharson, J. I., Schmid, D., …Kendrick, J. E. (2021). The force required to operate the plunger on a French press. American Journal of Physics, 89, Article 769. https://doi.org/10.1119/10.0004224

The French press is a popular device for brewing coffee, comprising a cylindrical beaker—or “jug”—fitted with a lid and plunger with a fine wire mesh filter. The plunger is used to drive the solid coffee particles to the bottom of the jug, separating... Read More about The force required to operate the plunger on a French press.

Permeability of packs of polydisperse hard spheres (2021)
Journal Article
Vasseur, J., Wadsworth, F. B., Coumans, J. P., & Dingwell, D. B. (2021). Permeability of packs of polydisperse hard spheres. Physical Review E, 103(6), https://doi.org/10.1103/physreve.103.062613

The permeability of packs of spheres is important in a wide range of physical scenarios. Here, we create numerically generated random periodic domains of spheres that are polydisperse in size and use lattice-Boltzmann simulations of fluid flow to det... Read More about Permeability of packs of polydisperse hard spheres.

Volcanic Unrest at Taupō Volcano in 2019: Causes, Mechanisms and Implications (2021)
Journal Article
Illsley‐Kemp, F., Barker, S. J., Wilson, C. J., Chamberlain, C. J., Hreinsdóttir, S., Ellis, S., …Wadsworth, F. B. (2021). Volcanic Unrest at Taupō Volcano in 2019: Causes, Mechanisms and Implications. Geochemistry, Geophysics, Geosystems, 22(6), https://doi.org/10.1029/2021gc009803

Taupō volcano, New Zealand, is a large caldera volcano that has been highly active through the Holocene. It most recently erupted ∼1,800 years ago but there have been multiple periods of historic volcanic unrest. We use seismological and geodetic ana... Read More about Volcanic Unrest at Taupō Volcano in 2019: Causes, Mechanisms and Implications.

Pressure-Driven Opening and Filling of a Volcanic Hydrofracture Recorded by Tuffisite at Húsafell, Iceland: A Potential Seismic Source (2021)
Journal Article
Unwin, H. E., Tuffen, H., Phillips, E., Wadsworth, F. B., & James, M. R. (2021). Pressure-Driven Opening and Filling of a Volcanic Hydrofracture Recorded by Tuffisite at Húsafell, Iceland: A Potential Seismic Source. Frontiers in Earth Science, 9, https://doi.org/10.3389/feart.2021.668058

The opening of magmatic hydraulic fractures is an integral part of magma ascent, the triggering of volcano seismicity, and defusing the explosivity of ongoing eruptions via outgassing magmatic volatiles. If filled with pyroclastic particles, these fr... Read More about Pressure-Driven Opening and Filling of a Volcanic Hydrofracture Recorded by Tuffisite at Húsafell, Iceland: A Potential Seismic Source.

Rapid alteration of fractured volcanic conduits beneath Mt Unzen (2021)
Journal Article
Yilmaz, T. I., Wadsworth, F. B., Gilg, H. A., Hess, K., Kendrick, J. E., Wallace, P. A., …Dingwell, D. B. (2021). Rapid alteration of fractured volcanic conduits beneath Mt Unzen. Bulletin of Volcanology, 83(5), Article 34. https://doi.org/10.1007/s00445-021-01450-7

The nature of sub-volcanic alteration is usually only observable after erosion and exhumation at old inactive volcanoes, via geochemical changes in hydrothermal fluids sampled at the surface, via relatively low-resolution geophysical methods or can b... Read More about Rapid alteration of fractured volcanic conduits beneath Mt Unzen.

Mechanical Compaction of Crustal Analogs Made of Sintered Glass Beads: The Influence of Porosity and Grain Size (2021)
Journal Article
Carbillet, L., Heap, M. J., Baud, P., Wadsworth, F. B., & Reuschlé, T. (2021). Mechanical Compaction of Crustal Analogs Made of Sintered Glass Beads: The Influence of Porosity and Grain Size. Journal of Geophysical Research. Solid Earth, 126(4), Article e2020JB021321. https://doi.org/10.1029/2020jb021321

The fundamentals of our understanding of the mechanical compaction of porous rocks stem from experimental studies. Yet, many of these studies use natural materials for which microstructural parameters are intrinsically coupled, hampering the diagnosi... Read More about Mechanical Compaction of Crustal Analogs Made of Sintered Glass Beads: The Influence of Porosity and Grain Size.

The fire resistance of high-strength concrete containing natural zeolites (2020)
Journal Article
Kushnir, A. R., Heap, M. J., Griffiths, L., Wadsworth, F. B., Langella, A., Baud, P., …Utley, J. E. (2021). The fire resistance of high-strength concrete containing natural zeolites. Cement and Concrete Composites, 116, Article 103897. https://doi.org/10.1016/j.cemconcomp.2020.103897

More sustainable and environmentally friendly concretes are essential to reduce the climatic and environmental impact of the growing demand for concrete to fuel urban sprawl. This manuscript reports on an experimental study designed to test the fire... Read More about The fire resistance of high-strength concrete containing natural zeolites.

A model for permeability evolution during volcanic welding (2020)
Journal Article
Wadsworth, F. B., Vasseur, J., Llewellin, E. W., Brown, R. J., Tuffen, H., Gardner, J. E., …Marone, F. (2021). A model for permeability evolution during volcanic welding. Journal of Volcanology and Geothermal Research, 409, https://doi.org/10.1016/j.jvolgeores.2020.107118

Volcanic ash and pyroclasts can weld when deposited hot by pyroclastic density currents, in near-vent fall deposits, or in fractures in volcano interiors. Welding progressively decreases the permeability of the particle packs, influencing a range of... Read More about A model for permeability evolution during volcanic welding.