Results 41 to 50 of about 1,425,422 (190)
The origin of Proterozoic massif-type anorthosites: Evidence from interactions between crustal xenoliths and basaltic magma [PDF]
, 1999 Plagioclase-rich reaction zones occur around numerous aluminous crustal xenoliths within a suite of Palaeogene sub-volcanic basic sheets on the Isle of Mull, NW Scotland.
Preston, R.J. +2 more
core +6 more sources
Volcanological challenges to understanding explosive large-scale eruptions
Earth, Planets and Space, 2020 An explosive eruption, associated with the formation of a large ignimbrite sheet and collapsed caldera, is the most severe volcanic disaster on Earth.
Nobuo Geshi
doaj +1 more source
Applied Sciences, 2021 We propose a multi-temporal-scale analysis of ground deformation data using both high-rate tilt and GNSS measurements and the DInSAR and daily GNSS solutions in order to investigate a sequence of four paroxysmal episodes of the Voragine crater occurring ...
Alessandro Bonforte +3 more
doaj +1 more source
Storage conditions of the mafic and silicic magmas at Cotopaxi, Ecuador [PDF]
Journal of Volcanology and Geothermal Research, 2018 The 2015 reactivation of the Cotopaxi volcano urges us to understand the complex eruptive dynamics of Cotopaxi for better management of a potential major crisis in the near future. Cotopaxi has commonly transitioned from andesitic eruptions of strombolian style (lava flows and scoria ballistics) or nuees ardentes (pyroclastic flows and ash falls) to ...
Martel, Caroline +5 more
openaire +3 more sources
Magma mobilization by downward-propagating decompression of the Eyjafjallajökull volcanic plumbing system [PDF]
Detailed observations of the 2010 Eyjafjallajökull eruptions in Iceland show seismic activity propagating vertically through the entire crust during a ten-week period of volcanic unrest comprising multiple eruption episodes.
White, R. S. +4 more
core +1 more source
Frontiers in Earth ScienceIntroductionDike intrusions can assist continental rifting and plate divergence. However, our understanding of the magma dynamics during diking and the architecture of the magma storage that feeds dikes are still limited by temporally and spatially ...
Alessandro La Rosa +8 more
doaj +1 more source
Explosive Activity on Kīlauea's Lower East Rift Zone Fueled by a Volatile‐Rich, Dacitic Melt
Geochemistry, Geophysics, Geosystems, 2022 Magmas with matrix glass compositions ranging from basalt to dacite erupted from a series of 24 fissures in the first 2 weeks of the 2018 Lower East Rift Zone (LERZ) eruption of Kīlauea Volcano.
Penny E. Wieser +9 more
doaj +1 more source
Crustal thickness and magma storage beneath the Ecuadorian arc
Journal of South American Earth Sciences, 2021 Abstract The Northern Andes of Ecuador contain some of the most active volcanic systems in the Andes and extend over a broad region from the Western Cordillera to the Subandean Zone. While it is known that the arc straddles a range of basement compositions, from accreted mafic oceanic terranes in the west to silicic continental terranes in the east ...
Clinton D. Koch +9 more
openaire +2 more sources
DensityX: A program for calculating the densities of magmatic liquids up to 1,627 °C and 30 kbar
Volcanica, 2019 Here we present a standalone program, DensityX, to calculate the densities of hydrous silicate melts (1,000s of samples in a single model run) given pressures, temperatures, and major oxide compositions in wt% in the 10-component system SiO2-TiO2-Al2O3 ...
Kayla Iacovino, Christy B Till
doaj +1 more source