Results 51 to 60 of about 82,590 (220)
Gradual caldera collapse at Bárdarbunga volcano, Iceland, regulated by lateral magma outflow
Science, 2016 Driven to collapse Volcanic eruptions occur frequently, but only rarely are they large enough to cause the top of the mountain to collapse and form a caldera. Gudmundsson et al.
M. Gudmundsson +47 more
semanticscholar +1 more source
Magmatic Densities Control Erupted Volumes in Icelandic Volcanic Systems
Frontiers in Earth Science, 2018 Magmatic density and viscosity exert fundamental controls on the eruptibility of magmas. In this study, we investigate the extent to which magmatic physical properties control the eruptibility of magmas from Iceland's Northern Volcanic Zone (NVZ).
Margaret Hartley +2 more
doaj +1 more source
, 2017 Pressure is one of the key variables that controls magmatic phase equilibria. However, estimating magma storage pressures from erupted products can be challenging. Various barometers have been developed over the past two decades that exploit the pressure-
D. Neave, K. Putirka
semanticscholar +1 more source
On the mechanism of interaction between strong earthquakes and volcanism in subduction zones
Вестник Камчатской региональной ассоциации "Учебно-научный центр". Серия: Науки о Земле, 2022 The relationship between strong earthquakes and powerful volcanism in subduction zones are discussed. It is shown that abnormally strong earthquakes or a group of strong earthquakes and powerful volcanic events or volcanic activation of large areas can ...
Rebetsky Yu.L., Stefanov Yu.P.
doaj +1 more source
Arithmetic and $k$-maximality of the cyclic free magma [PDF]
Arithmetic and k-maximality of the cyclic free magma. Algebra
Universalis, 80:35 (2019)We survey free magmas and we explore the structure of their submagmas. By equipping the cyclic free magma with a second distributive operation we obtain a ringoid-like structure with some primitive arithmetical properties. A submagma is $k$-maximal when there are only $k-1$ submagmas between it and the free magma itself. These two tools, arithmetic and
arxiv +1 more source
Density of magmas at depth [PDF]
Chemical Geology, 2016 Knowing the density of silicate liquids at high pressure is essential to answer questions relevant to the presence of magmas at depth, whether that be in the present Earth or in its earliest times, during differentiation of the planet. Melts have unique physical and chemical properties, which vary as a function pressure, and chemical composition.
openaire +4 more sources
Thick crust, hydrous magmas, and the paradox of voluminous cold magmatism
Volcanica, 2021 Andesites are refined and “cold” magmas compared to their basaltic parents, yet large volumes of andesites are generated at continental arcs. We show that large andesitic plutons are favored when arc crust attains a thickness of ~60 km while mafic ...
Cin-Ty Lee, Boda Liu
doaj +1 more source
Atmosphere-interior exchange on hot rocky exoplanets [PDF]
, 2016 We provide estimates of atmospheric pressure and surface composition on short-period rocky exoplanets with dayside magma pools and silicate vapor atmospheres. Atmospheric pressure tends toward vapor-pressure equilibrium with surface magma, and magma-surface composition is set by the competing effects of fractional vaporization and surface-interior ...
arxiv +1 more source
Silicic magma reservoirs in the Earth’s crust
, 2016 Magma reservoirs play a key role in controlling numerous processes in planetary evolution, including igneous differentiation and degassing, crustal construction, and volcanism.
O. Bachmann, C. Huber
semanticscholar +1 more source
Boulder of orbicular rapakivi in Taivassalo, southwestern Finland [PDF]
Bulletin of the Geological Society of Finland, 1983 A boulder of an orbicular rapakivi was found in Taivassalo, close to the southern contact of the Vehmaa rapakivi area in southwestern Finland. Many features, e.g.
N. Edelman
doaj +1 more source