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 …

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 …

Induced polarization as a tool to assess alteration in geothermal systems: a review

A Revil, M Gresse - Minerals, 2021 - mdpi.com
The mineral alteration patterns in high-to low-temperature geothermal fields affect the
induced polarization (electrical conductivity and chargeability) properties of volcanic rocks …

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 …

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 …

A fractal model for the electrical conductivity of water-saturated porous media during mineral precipitation-dissolution processes

F Rembert, D Jougnot, L Guarracino - Advances in Water Resources, 2020 - Elsevier
Precipitation and dissolution are prime processes in carbonate rocks and being able to
monitor them is of major importance for aquifer and reservoir exploitation or environmental …

Three‐dimensional electrical conductivity and induced polarization tomography of a rock glacier

PA Duvillard, A Revil, Y Qi… - Journal of …, 2018 - Wiley Online Library
Three‐dimensional electrical resistivity and induced polarization data were collected on an
unstable Alpine rock glacier in Val Thorens (Vanoise massif, France). In addition to these …

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 …

Influence of alteration on the mechanical behaviour and failure mode of andesite: implications for shallow seismicity and volcano monitoring

SP Mordensky, MJ Heap, BM Kennedy, HA Gilg… - Bulletin of …, 2019 - Springer
Volcanoes often host hydrothermal systems that alter the host rock. To understand the
influence of alteration on mechanical behaviour of edifice-forming rock, we performed a …