Results 21 to 30 of about 92,567 (225)
Quantifying the link between magma ascent dynamics and tilt [PDF]
, 2020 Magma viscosity and its ascent rate are key factors in controlling eruption style. Shear stress exerted on the conduit walls as magma ascends pulls up the surrounding edifice, whilst overpressure pushes the edifice outwards.
Marsden, Luke
core +5 more sources
Magma ascent by porous flow [PDF]
Journal of Geophysical Research: Solid Earth, 1986 Porous flow of buoyant liquid through partially molten rock is regarded as the initial transport process leading to magma segregation in the mantle. Recent work has identified the importance of matrix deformation and compaction in this process. We present finite‐difference calculations based on a generalized form of Darcy's law that includes matrix ...
Scott, David R., Stevenson, David J.
openaire +2 more sources
Degassing during quiescence as a trigger of magma ascent and volcanic eruptions. [PDF]
Sci Rep, 2015 Understanding the mechanisms that control the start-up of volcanic unrest is crucial to improve the forecasting of eruptions at active volcanoes. Among the most active volcanoes in the world are the so-called persistently degassing ones (e.g., Etna ...
Girona T, Costa F, Schubert G.
europepmc +2 more sources
Magma ascent in planetesimals: Control by grain size [PDF]
Earth and Planetary Science Letters, 2019 15 pages, 6 figures, 1 table; associated video file at http://goo.gl/V1UK1i; associated blog post at http://bit.ly ...
Tim Lichtenberg +4 more
openaire +3 more sources
Quantifying magma ascent rates for explosive and effusive eruptions [PDF]
, 2023 Magma ascent rate can control the explosivity and hazard potential of a given eruption but is notoriously difficult to directly determine from erupted samples or geophysical datasets.
Costa, Fidel +2 more
core +1 more source
Magma Ascent Model inputs and results
, 2021 Data for paper titled “Determining the effect of varying magmatic volatile content on lunar magma ascent dynamics” for consideration by the Journal of Geophysical Research: Planets.
Department of Earth and Environmental Sciences +1 more
core +2 more sources
Rapid ascent of rhyolitic magma at Chaitén volcano, Chile [PDF]
Nature, 2009 Rhyolite magma has fuelled some of the Earth's largest explosive volcanic eruptions. Our understanding of these events is incomplete, however, owing to the previous lack of directly observed eruptions. Chaitén volcano, in Chile's northern Patagonia, erupted rhyolite magma unexpectedly and explosively on 1 May 2008 (ref. 2).
Castro, J., Dingwell, D.
openaire +3 more sources
Driven magmatism and crustal thinning of coastal southern China in response to subduction [PDF]
Solid EarthThe late Mesozoic igneous rocks along the coastal South China Block (SCB) exhibit complex parental sources involving a depleted mantle, subducted sediment-derived melt, and melted crust.
J. Su, W. Zhu, G. Li
doaj +1 more source
Seismogenic frictional melting in the magmatic column [PDF]
Solid Earth, 2014 Lava dome eruptions subjected to high extrusion rates commonly evolve from endogenous to exogenous growth and limits to their structural stability hold catastrophic potential as explosive eruption triggers.
J. E. Kendrick +8 more
doaj +1 more source
Geosciences, 2016 Sakurajima in Japan is one of the world’s most active volcanoes. This paper presents the results of a petrological study of the Showa Crater volcanic ash samples ejected from January 2011 to November 2012 from Sakurajima.
Idham Andri Kurniawan +2 more
doaj +1 more source