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 …

An overview of the large-magnitude (VEI 4) eruption of Merapi in 2010

Subandriyo, R Gertisser, N Aisyah, H Humaida… - … , Eruptive Activity, and …, 2023‏ - Springer
The VEI 4 eruption in 2010 was the worst volcanic disaster at Merapi in 80 years. The
unusual size and dynamics of the eruption, the rapid acceleration of events and the large …

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 …

Exploring the scale-dependent permeability of fractured andesite

MJ Heap, BM Kennedy - Earth and Planetary Science Letters, 2016‏ - Elsevier
Extension fractures in volcanic systems exist on all scales, from microscopic fractures to
large fissures. They play a fundamental role in the movement of fluids and distribution of …

[HTML][HTML] The evolution of pore connectivity in volcanic rocks

M Colombier, FB Wadsworth, L Gurioli, B Scheu… - Earth and planetary …, 2017‏ - Elsevier
Pore connectivity is a measure of the fraction of pore space (vesicles, voids or cracks) in a
material that is interconnected on the system length scale. Pore connectivity is …

Thermal stressing of volcanic rock: microcracking and crack closure monitored through acoustic emission, ultrasonic velocity, and thermal expansion

L Griffiths, MJ Heap, O Lengliné, P Baud… - Journal of …, 2024‏ - Wiley Online Library
Microcracking due to thermal stresses affects the mechanical and flow properties of rocks,
which is significant for thermally dynamic environments such as volcanoes and geothermal …

The permeability of fractured rocks in pressurised volcanic and geothermal systems

A Lamur, JE Kendrick, GH Eggertsson, RJ Wall… - Scientific reports, 2017‏ - nature.com
The connectivity of rocks' porous structure and the presence of fractures influence the
transfer of fluids in the Earth's crust. Here, we employed laboratory experiments to measure …

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 multidisciplinary approach to quantify the permeability of the Whakaari/White Island volcanic hydrothermal system (Taupo Volcanic Zone, New Zealand)

MJ Heap, BM Kennedy, JI Farquharson… - Journal of Volcanology …, 2017‏ - Elsevier
Our multidisciplinary study aims to better understand the permeability of active volcanic
hydrothermal systems, a vital prerequisite for modelling and understanding their behaviour …