The mechanical behaviour and failure modes of volcanic rocks: a review

MJ Heap, MES Violay - Bulletin of Volcanology, 2021 - Springer
The microstructure and mineralogy of volcanic rocks is varied and complex, and their
mechanical behaviour is similarly varied and complex. This review summarises recent …

Diverse magma storage and major and volatile magma composition: What are the implications on the eruptive style across a volcanic arc? An example of the Lesser …

A Metcalfe, S Moune, JC Komorowski, R Robertson… - Earth-Science …, 2023 - Elsevier
Understanding variations in eruptive style and defining the processes and controls on
different eruption styles is particularly important at arc volcanoes. This is due to the range of …

Towards more realistic values of elastic moduli for volcano modelling

MJ Heap, M Villeneuve, F Albino… - Journal of volcanology …, 2020 - Elsevier
The accuracy of elastic analytical solutions and numerical models, widely used in
volcanology to interpret surface ground deformation, depends heavily on the Young's …

Hydrothermal alteration can result in pore pressurization and volcano instability

MJ Heap, T Baumann, HA Gilg, S Kolzenburg… - …, 2021 - pubs.geoscienceworld.org
The collapse of a volcanic flank can be destructive and deadly. Hydrothermal alteration is
common to volcanoes worldwide and is thought to promote volcano instability by decreasing …

Alteration‐induced volcano instability at la Soufrière de Guadeloupe (eastern Caribbean)

MJ Heap, TS Baumann… - Journal of …, 2021 - Wiley Online Library
Volcanoes are unstable structures that deform laterally and frequently experience mass
wasting events. Hydrothermal alteration is often invoked as a mechanism that contributes …

Hydrothermal alteration of andesitic lava domes can lead to explosive volcanic behaviour

MJ Heap, VR Troll, ARL Kushnir, HA Gilg… - Nature …, 2019 - nature.com
Dome-forming volcanoes are among the most hazardous volcanoes on Earth. Magmatic
outgassing can be hindered if the permeability of a lava dome is reduced, promoting pore …

Three‐dimensional density structure of La Soufrière de Guadeloupe lava dome from simultaneous muon radiographies and gravity data

M Rosas‐Carbajal, K Jourde, J Marteau… - Geophysical …, 2017 - Wiley Online Library
Muon imaging has recently emerged as a powerful method to complement standard
geophysical tools in the understanding of the Earth's subsurface. Muon measurements yield …

Hidden mechanical weaknesses within lava domes provided by buried high-porosity hydrothermal alteration zones

H Darmawan, VR Troll, TR Walter, FM Deegan… - Scientific Reports, 2022 - nature.com
Catastrophic lava dome collapse is considered an unpredictable volcanic hazard because
the physical properties, stress conditions, and internal structure of lava domes are not well …

The tensile strength of hydrothermally altered volcanic rocks

MJ Heap, CE Harnett, FB Wadsworth, HA Gilg… - Journal of Volcanology …, 2022 - Elsevier
The tensile strength of volcanic rocks is an important parameter for understanding and
modelling a wide range of volcanic processes, and in the development of strategies …

The 2018 unrest phase at La Soufrière of Guadeloupe (French West Indies) andesitic volcano: Scrutiny of a failed but prodromal phreatic eruption

R Moretti, JC Komorowski, G Ucciani, S Moune… - Journal of Volcanology …, 2020 - Elsevier
After 25 years of gradual increase, volcanic unrest at La Soufrière of Guadeloupe reached
its highest seismic energy level on 27 April 2018, with the largest felt volcano-tectonic (VT) …