Results 21 to 30 of about 10,162 (248)
Frontiers in Earth Science, 2023 The Himalayan leucogranites provide a good opportunity to investigate the crustal evolution of the southern Qinghai-Tibet Plateau. In this study, we present zircon U-Pb and monazite U-Th-Pb ages, zircon Hf isotopes and whole-rock Sr-Nd-Pb isotopes and ...
Zuowen Dai +7 more
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Geochemistry, Geophysics, Geosystems, 2023 Giant volcanic eruptions have the potential to overturn civilizations. Yet, the driving mechanism and timescale over which batholithic magma reservoirs transition from non‐eruptible crystal mush to mobile melt‐dominated stages and our capacity to detect ...
G. Weber, J. Blundy, D. Bevan
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Progressive underplating of mafic material at mid-crustal depth beneath Ischia volcano, Italy
Communications Earth & Environment, 2023 The destructive (Mw 3.9) earthquake of 21 August 2017 re-opened the question on where magma resides at the Ischia island volcano. The peculiar complexity of the seismic source initiated the debate on the involvement of fluid-related processes, but the ...
Irene Bianchi +3 more
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Time scales of crystal mixing in magma mushes [PDF]
Geophysical Research Letters, 2016 AbstractMagma mixing is widely recognized as a means of producing compositional diversity and preconditioning magmas for eruption. However, the processes and associated time scales that produce the commonly observed expressions of magma mixing are poorly understood, especially under crystal‐rich conditions.
Schleicher, Jillian M. +3 more
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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 +3 more
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Crystal Shape Control on the Repacking and Jamming of Crystal‐Rich Mushes
Geophysical Research Letters, 2022 AbstractThe rheology of crustal mushes is a crucial parameter controlling melt segregation and magma flow. However, the relations between mush dynamics and crystal size and shape distribution remain poorly understood because of the complexity of melt‐crystal and crystal‐crystal interactions.
Susana Hoyos +3 more
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Volcanic eruptions from ghost magma chambers [PDF]
, 2008 Recent studies have proposed that magma reservoirs crystallized to a virtually rigid crystal-mush can be partially remelted by diffusion of hot fluids. We show that for a crystal mush with the composition of a K-trachyte from the Campanian Ignimbrite (CI)
BATTAGLIA, MAURIZIO +3 more
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Vertically extensive and unstable magmatic systems:a unified view of igneous processes [PDF]
, 2017 Volcanoes are an expression of their underlying magmatic systems. Over the past three decades, the classical focus on upper crustal magma chambers has expanded to consider magmatic processes throughout the crust.
Cashman, Katharine V. +2 more
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On the mechanical effects of poroelastic crystal mush in classical magma chamber models [PDF]
, 2018 Author Posting. © American Geophysical Union, 2018. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Journal of Geophysical Research: Solid Earth 123(
Jones, Meghan +2 more
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Frontiers in Earth Science, 2021 The Aso-4 caldera-forming event (86.4 ± 1.1 ka, VEI-8) is the second largest volcanic eruption Earth experienced in the past 100 ka. The ignimbrite sheets produced during this event are some of the first ever described compositionally zoned pyroclastic ...
Franziska Keller +3 more
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