All Outputs (4)

Combined effusive-explosive silicic volcanism straddles the multiphase viscous-to-brittle transition (2018)
Journal Article
Wadsworth, F. B., Witcher, T., Vossen, C. E., Hess, K., Unwin, H. E., Scheu, B., …Dingwell, D. B. (2018). Combined effusive-explosive silicic volcanism straddles the multiphase viscous-to-brittle transition. Nature Communications, 9(1), Article 4696. https://doi.org/10.1038/s41467-018-07187-w

Magma is a viscoelastic fluid that can support fracture propagation when local shear stresses are high, or relax and flow when shear stresses are low. Here we present experiments to confirm this using synthetic and natural magmatic liquids across eru... Read More about Combined effusive-explosive silicic volcanism straddles the multiphase viscous-to-brittle transition.

Upscaling permeability in anisotropic volcanic systems (2018)
Journal Article
Farquharson, J. I., & Wadsworth, F. B. (2018). Upscaling permeability in anisotropic volcanic systems. Journal of Volcanology and Geothermal Research, 364, 35-47. https://doi.org/10.1016/j.jvolgeores.2018.09.002

Permeability is an important input to models of shallow magma ascent. It is a property that can exhibit anisotropy in volcanic magmas, rocks and edifices. Here we show that some important features of permeability anisotropy can be captured by a simpl... Read More about Upscaling permeability in anisotropic volcanic systems.

Disclosing the temperature of columnar jointing in lavas (2018)
Journal Article
Lamur, A., Lavallée, Y., Iddon, F. E., Hornby, A. J., Kendrick, J. E., von Aulock, F. W., & Wadsworth, F. B. (2018). Disclosing the temperature of columnar jointing in lavas. Nature Communications, 9(1), Article 1432. https://doi.org/10.1038/s41467-018-03842-4

Columnar joints form by cracking during cooling-induced contraction of lava, allowing hydrothermal fluid circulation. A lack of direct observations of their formation has led to ambiguity about the temperature window of jointing and its impact on flu... Read More about Disclosing the temperature of columnar jointing in lavas.

Experimental sintering of ash at conduit conditions and implications for the longevity of tuffisites (2018)
Journal Article
Gardner, J. E., Wadsworth, F. B., Llewellin, E. W., Watkins, J. M., & Coumans, J. P. (2018). Experimental sintering of ash at conduit conditions and implications for the longevity of tuffisites. Bulletin of Volcanology, 80(3), Article 23. https://doi.org/10.1007/s00445-018-1202-8

Escape of gas from magma in the conduit plays a crucial role in mitigating explosivity. Tuffisite veins—ash-filled cracks that form in and around volcanic conduits—represent important gas escape pathways. Sintering of the ash infill decreases its por... Read More about Experimental sintering of ash at conduit conditions and implications for the longevity of tuffisites.