All Outputs (5)

Particle migration due to non-uniform laminar flow (2024)
Journal Article
Koenders, M. A. C., & Petford, N. (2024). Particle migration due to non-uniform laminar flow. Fluid Dynamics Research, 56(5), Article 055508. https://doi.org/10.1088/1873-7005/ad8516

Using methods of granular mechanics in the quasi-static limit, with inter-particle interactions derived from the lubrication limit, the intensity of velocity fluctuations in the slurry is associated with fluctuations in the local distribution of inte... Read More about Particle migration due to non-uniform laminar flow.

Confocal microscopy 3D imaging and bioreactivity of La Palma volcanic ash particles (2023)
Journal Article
Wertheim, D., Coldwell, B., Miyashita, L., Gill, I., Crust, S., Giddens, R., Pérez, N. M., Petford, N., & Grigg, J. (2023). Confocal microscopy 3D imaging and bioreactivity of La Palma volcanic ash particles. Science of the Total Environment, 899, Article 165647. https://doi.org/10.1016/j.scitotenv.2023.165647

In September 2021 an eruption began of Cumbre Vieja, La Palma (Spain) that lasted 3 months. Previous studies have shown that volcanic ash particles can be associated with adverse effects on human health however, the reasons for this are unclear. Part... Read More about Confocal microscopy 3D imaging and bioreactivity of La Palma volcanic ash particles.

3D imaging of volcanic ash using the confocal microscope; a comparison of natural fragments and experimentally vesiculated volcanic glass (2023)
Journal Article
Gillmore, G. K., Wertheim, D., Mcintosh, I. M., Petford, N., & Gill, I. (2023). 3D imaging of volcanic ash using the confocal microscope; a comparison of natural fragments and experimentally vesiculated volcanic glass. Natural Hazards, 116(3), 4021-4036. https://doi.org/10.1007/s11069-023-05823-3

Identifying the microstructural characteristics of volcanic ash particles is key in developing our understanding of their production, transport and impact. Volcanic glass in ash clouds can damage aircraft engines, surfaces and coatings, and if inhale... Read More about 3D imaging of volcanic ash using the confocal microscope; a comparison of natural fragments and experimentally vesiculated volcanic glass.

How are silicic volcanic and plutonic systems related? Part 1: A review of geological and geophysical observations, and insights from igneous rock chemistry (2022)
Journal Article
Clemens, J. D., Bryan, S. E., Mayne, M. J., Stevens, G., & Petford, N. (2022). How are silicic volcanic and plutonic systems related? Part 1: A review of geological and geophysical observations, and insights from igneous rock chemistry. Earth-Science Reviews, 235, Article 104249. https://doi.org/10.1016/j.earscirev.2022.104249

Silicic volcanic and plutonic rocks (SiO 2 ≥ 66 wt%) are generally viewed as being either compositional equivalents or complementary to each other. However, consideration of the geological, geophysical and chemical evidence suggests that silicic volc... Read More about How are silicic volcanic and plutonic systems related? Part 1: A review of geological and geophysical observations, and insights from igneous rock chemistry.

How are silicic volcanic and plutonic systems related? Part 2: Insights from phase-equilibria, thermodynamic modelling and textural evidence (2022)
Journal Article
Petford, N. (2022). How are silicic volcanic and plutonic systems related? Part 2: Insights from phase-equilibria, thermodynamic modelling and textural evidence. Earth-Science Reviews, 235, Article 104250. https://doi.org/10.1016/j.earscirev.2022.104250

Thermodynamic modelling shows that, although high-silica rhyolitic melts can form through fractionation of
low-silica rhyolitic magmas the complementary cumulates do not have compositions similar to natural plutonic
granites. Rather than being gran... Read More about How are silicic volcanic and plutonic systems related? Part 2: Insights from phase-equilibria, thermodynamic modelling and textural evidence.