Results 11 to 20 of about 1,472 (257)

Crystal mush processes and crustal magmatism [PDF]

Nature Reviews Earth & Environment
Much of Earth’s magma is stored as extensive crystal mush systems, yet the prevalence of physical processes operating within mushes and their importance in volcanically active regions remain enigmatic. In this Review, we explore the physical properties and key processes of crystal mush systems. The initiation, evolution and decline of volcanic systems,
Madeleine C S Humphreys, Olivier Namur, Wendy A Bohrson   +2 more
exaly   +4 more sources

On the Mechanical Effects of Poroelastic Crystal Mush in Classical Magma Chamber Models [PDF]

Journal of Geophysical Research: Solid Earth, 2018
AbstractImproved constraints on the mechanical behavior of magma chambers is essential for understanding volcanic processes; however, the role of crystal mush on the mechanical evolution of magma chambers has not yet been systematically studied. Existing magma chamber models typically consider magma chambers to be isolated melt bodies surrounded by ...
Yang Liao, S Adam Soule, Meghan Jones
exaly   +5 more sources

The mechanical response of a magma chamber with poroviscoelastic crystal mush [PDF]

Journal of Geophysical Research: Solid Earth, 2020
Abstract Improved understanding of the impact of crystal mush rheology on the response of magma chambers to magmatic events is critical for better understanding crustal igneous systems with abundant crystals. In this study, we extend an earlier model by Liao et al.
Yang liao, Adam Soule, Meghan Jones, Helene Le Mevel   +3 more
openaire   +4 more sources

Crystal Resorption as a Driver for Mush Maturation: an Experimental Investigation [PDF]

Journal of Petrology
Abstract The thermal state of a magma reservoir controls its physical and rheological properties: at storage temperatures close to the liquidus, magmas are dominated by melt and therefore mobile, while at lower temperatures, magmas are stored as a rheologically locked crystal network with interstitial melt (crystal mush).
Martin F Mangler, Madeleine C S Humphreys, Alexander A Iveson, Kari M Cooper, Michael A Clynne, Amanda Lindoo, Richard A Brooker, Fabian B Wadsworth   +7 more
openaire   +4 more sources

Mush microphysics and the reactivation of crystal‐rich magma reservoirs [PDF]

Journal of Geophysical Research: Solid Earth, 2014
AbstractReactivation and eruption of upper crustal crystal‐rich magma reservoirs (“crystal mushes”) following recharge has recently been invoked in numerous volcanic systems worldwide. Over the last few years, several models have been proposed for the reactivation of such mushes prior to or during eruptions.
Andrea Parmigiani, Christian Huber, Olivier Bachmann   +2 more
exaly   +3 more sources

Numerical simulations of the mingling caused by a magma intruding a resident mush

Volcanica
Currently, our ability to interpret the mechanics of magma mingling and mixing is limited by an incomplete understanding of the modes of mixing across all melt fractions and compositions.
Alexandre Carrara, Alain Burgisser, George W. Bergantz   +2 more
doaj   +3 more sources

A General Model for the Permeability of Magma Mush [PDF]

Geochemistry, Geophysics, Geosystems
Percolation through magma mush is a key transport mechanism for melts in the crust and is influenced by the permeability of the crystal framework. Existing models for mush permeability do not account for the range of microstructures that can evolve as ...
Eloïse Bretagne, Fabian B. Wadsworth, Jérémie Vasseur, Katherine E. Schofield, Madeleine C. S. Humphreys, Katherine J. Dobson   +5 more
doaj   +3 more sources

Annual-to-millennial fluctuations in the physical properties of crystal-rich magma storage zones [PDF]

Communications Earth & Environment
Basaltic melts may variably disaggregate macrocrysts (large crystals) from crystal mushes during the assembly of magma bodies beneath ocean-island volcanoes.
Oliver Higgins, Michael J. Stock, Dennis Geist, David A. Neave, Iris Buisman, Benjamin Bernard, Matthew Gleeson   +6 more
doaj   +2 more sources

Lithium mica clasts document magmatic evolution prior to eruption in the macusani volcanic field in peru [PDF]

Scientific Reports
Typically found in rare-metal granites and pegmatites, lithium micas are increasingly considered a resource for lithium as global demand surges. In a recently discovered major lithium resource within the Macusani Volcanic Field in Peru, lithium mica ...
Lisard Torró, Johan Ramirez-Briones, Mercy K. Sanandres-Flores, Loïs Monnier, Cristina Villanova-de-Benavent, Kathleen A. Zanetti, Kevin Konrad, Jean Vallance, Oscar Laurent, Stefano Salvi, Patrice Baby, Joaquín A. Proenza, Olivier Bachmann, Fernando Nieto   +13 more
doaj   +2 more sources

Timescales of storage and recycling of crystal mush at Krafla Volcano, Iceland [PDF]

Contributions to Mineralogy and Petrology, 2016
Processes in upper-crustal magma reservoirs such as recharge, magma mixing, recycling of previously crystallized material, and eruption affect both the physical state and the chemical composition of magmas. A growing body of evidence shows that crystals in intermediate or silicic volcanic rocks preserve records of these processes that may be obscured ...
Cooper, Kari M., Sims, Kenneth W. W., Eiler, John M., Banerjee, Neil   +3 more
openaire   +5 more sources