Results 61 to 70 of about 2,155,550 (190)
Understanding silicic volcanism: Constraints from elasticity and failure of vesicular magma [PDF]
, 2005 Volcanic eruptions are one of the most spectacular and dangerous natural phenomena. Volcanic activity can either be effusive, dominated by quiescent emission of lava or explosive, dominated by the eruption of pyroclastic material.
Scheu, Bettina
core +1 more source
GeosciencesPolymer co-extrusion experiments are described simulating the dynamics of two different magmas (e.g., silicic and mafic having different viscosities) flowing simultaneously in a vertical volcanic pipe or conduit which results in the effusion of composite
Charles R. Carrigan +1 more
doaj +1 more source
Heidegger and Levinas on the phenomenology of the hand: Between work and gesture
The Southern Journal of Philosophy, EarlyView.Abstract This article explores how Heidegger and Levinas develop distinct phenomenological accounts of the hand. Both thinkers refuse to treat the hand as merely an anatomical organ, instead viewing it as an essential dimension of human existence. Yet their interpretations diverge sharply. In the first section, I show how Heidegger grounds the function
Cristian Ciocan
wiley +1 more source
Magma Plumbing During the 2014–2015 Eruption of Fogo (Cape Verde Islands)
Frontiers in Earth Science, 2020 Phenocrysts in volcanic rocks are recorders of magmatic processes that have occurred at depth before and during a volcanic eruption. Our petrological investigations of stratigraphically controlled tephrite and phonotephrite samples from the latest ...
Andreas Klügel +3 more
doaj +1 more source
Fault‐Controlled Permeability: A Key Parameter in Geothermal Electricity Production Assessment
Terra Nova, EarlyView.ABSTRACT Geothermal energy is central to the global green energy transition, but its development has long focused on regions with positive thermal anomalies. Through a semi‐quantitative global‐scale review and spatial analysis of 361 geothermal sites, we show that 56.2% of global geothermal electricity production occurs in regions with thermal ...
Vincent Roche, Gaétan Milesi
wiley +1 more source
Tracking Crystals Evolution in Episodes of Magma Mixing
Applied SciencesPetrology and geochemistry reconstruct from plutons and eruptive products the underground chemical and thermodynamic conditions of magma at the time of crystallization.
Antonella Longo +2 more
doaj +1 more source
Seismic Constraints on the 3‐D Magma Conduit System of Mount Etna
Geochemistry, Geophysics, GeosystemsMount Etna, one of the most active volcanoes in the world, provides an excellent natural laboratory for investigating magma plumbing systems. However, previous models of Etna's volcanic structure have not adequately resolved the distribution of deep ...
Siwen Zhang +8 more
doaj +1 more source
Geosciences, 2020 Magmatic and hydrothermal systems are intimately linked, significantly overlapping through time but persisting in different parts of a system. New preliminary U-Pb and trace element petrochronology from zircon and titanite demonstrate the protracted and ...
Michael A. Stearns +7 more
doaj +1 more source
Progressive Changes in Magma Transport at the Active Serreta Ridge, Azores
Geochemistry, Geophysics, Geosystems, 2019 AbstractVolcanism in the Eastern Azores Plateau occurs at large central volcanoes and along subaerial and submarine fissure zones, resulting from a mantle melting anomaly combined with transtensional stresses. Volcanic structures are aligned WNW‐ESE and NW‐SE, reflecting two tectonic stress fields that control the direction of lateral melt transport ...
R.H.W. Romer +4 more
openaire +6 more sources
Nature CommunicationsThe Oceanus Procellarum region, characterized by its vast basaltic plains and pronounced volcanic activity, serves as a focal point for understanding the volcanic history of the Moon.
Meixia Geng +4 more
doaj +1 more source