The rheology of two-phase magmas: A review and analysis
We consider the current state of our understanding of the rheology of two-phase magmas,
that is suspensions of either bubbles or crystals in a viscous silicate melt. The discussion is …
that is suspensions of either bubbles or crystals in a viscous silicate melt. The discussion is …
Magma fragmentation
HM Gonnermann - Annual Review of Earth and Planetary …, 2015 - annualreviews.org
Magma fragmentation is the breakup of a continuous volume of molten rock into discrete
pieces, called pyroclasts. Because magma contains bubbles of compressible magmatic …
pieces, called pyroclasts. Because magma contains bubbles of compressible magmatic …
Microstructural controls on the physical and mechanical properties of edifice‐forming andesites at Volcán de Colima, Mexico
MJ Heap, Y Lavallée, L Petrakova… - Journal of …, 2014 - Wiley Online Library
The reliable assessment of volcanic unrest must rest on an understanding of the rocks that
form the edifice. It is their microstructure that dictates their physical properties and …
form the edifice. It is their microstructure that dictates their physical properties and …
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 …
transfer of fluids in the Earth's crust. Here, we employed laboratory experiments to measure …
The role of melt-fracture degassing in defusing explosive rhyolite eruptions at volcán Chaitén
Explosive volcanic eruptions of silicic magma often evolve towards non-explosive emissions
of lava. The mechanisms underlying this transition remain unclear, however, a widely cited …
of lava. The mechanisms underlying this transition remain unclear, however, a widely cited …
The effects of outgassing on the transition between effusive and explosive silicic eruptions
W Degruyter, O Bachmann, A Burgisser… - Earth and Planetary …, 2012 - Elsevier
The eruption style of silicic magmas is affected by the loss of gas (outgassing) during ascent.
We investigate outgassing using a numerical model for one-dimensional, two-phase, steady …
We investigate outgassing using a numerical model for one-dimensional, two-phase, steady …
The influence of porosity and vesicle size on the brittle strength of volcanic rocks and magma
Volcanic rocks and magma display a wide range of porosity and vesicle size, a result of their
complex genesis. While the role of porosity is known to exert a fundamental control on …
complex genesis. While the role of porosity is known to exert a fundamental control on …
Reconstructing magma failure and the degassing network of dome-building eruptions
Volcanic eruptions are regulated by the rheology of magmas and their ability to degas. Both
detail the evolution of stresses within ascending subvolcanic magma. But as magma is …
detail the evolution of stresses within ascending subvolcanic magma. But as magma is …
Deformation experiments of bubble‐and crystal‐bearing magmas: Rheological and microstructural analysis
Simple shear deformation experiments on three‐phase, hydrous, haplogranitic magmas,
composed of quartz crystals (24–65 vol.%), CO2‐rich gas bubbles (9–12 vol.%) and melt in …
composed of quartz crystals (24–65 vol.%), CO2‐rich gas bubbles (9–12 vol.%) and melt in …
Evidence for the development of permeability anisotropy in lava domes and volcanic conduits
The ease at which exsolving volatiles can migrate though magma and outgas influences the
explosivity of a volcanic eruption. Volcanic rocks often contain discrete discontinuities …
explosivity of a volcanic eruption. Volcanic rocks often contain discrete discontinuities …