Results 31 to 40 of about 392,695 (199)
Frontiers in Earth Science, 2018 Volcanic eruptions occur when a conduit forms to connect a crustal magma reservoir to Earth’s surface. Conduit formation is generally assumed to be a ‘bottom–up’ process and a major driver of precursory volcanic seismicity, which is the most commonly ...
Diana C. Roman, Katharine V. Cashman
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Comptes Rendus. Géoscience, 2022 The “Fani Maoré” eruption off the coasts of Mayotte has been intensively monitored by applying methods similar to those used for subaerial eruptions. Repeated high-resolution bathymetric surveys and dredging, coupled with petrological analyses of time ...
Berthod, Carole +30 more
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The mechanics of shallow magma reservoir outgassing [PDF]
Geochemistry, Geophysics, Geosystems, 2017 AbstractMagma degassing fundamentally controls the Earth's volatile cycles. The large amount of gas expelled into the atmosphere during volcanic eruptions (i.e., volcanic outgassing) is the most obvious display of magmatic volatile release. However, owing to the large intrusive:extrusive ratio, and considering the paucity of volatiles left in intrusive
A. Parmigiani +4 more
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Unraveling the Physics of the Yellowstone Magmatic System Using Geodynamic Simulations
Frontiers in Earth Science, 2018 The Yellowstone magmatic system is one of the largest magmatic systems on Earth, and thus an ideal location to study magmatic processes. Whereas previous seismic tomography results could only image a shallow magma reservoir, a recent study using more ...
Georg S. Reuber +5 more
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Terrestrial, Atmospheric and Oceanic Sciences, 2021 The white ignimbrite layer on top of volcanic sequences in the Coastal Range is the youngest eruption of the northern Luzon Arc in the Taiwan region. A gabbroic enclave was coexisting with the andesitic ignimbrite in this sequence. This study reports the
Yu-Ming Lai +5 more
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Frontiers in Earth Science, 2021 Magma reservoir recharge is widely recognised as a precursor of eruptive activity. However, the causative relationships between reservoir rejuvenation and surface observables such as gravitational potential field changes and ground deformation are still ...
Katie Males, Jo Gottsmann, Jo Gottsmann
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Imaging a magma plumbing system from MASH zone to magma reservoir [PDF]
Earth and Planetary Science Letters, 2017 The Puna Plateau of the Central Andes is a well-suited location to investigate the processes associated with the tectono-magmatic development of a Cordilleran system. These processes include long-lived subduction (including shallow and steep phases), substantial crustal thickening, the emplacement of large volumes of igneous rocks, and probably ...
Jonathan R. Delph +4 more
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Composition and Petrology of a Mush-Bearing Magma Reservoir beneath Tenerife [PDF]
Journal of Petrology, 2022 AbstractDeciphering the dynamics of sub-volcanic magmatic processes requires a detailed understanding of the compositional and textural relationships between melt and crystals. To examine these relationships, we investigated material from one of the largest caldera-forming explosive eruptions on the ocean island of Tenerife, the 312-ka Fasnia event ...
Horn, EL +4 more
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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.
Parmigiani, Andrea +2 more
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