Results 71 to 80 of about 23,662 (266)

Petrography and petrology of the Hawaii Scientific Drilling Project lavas: Inferences from olivine phenocryst abundances and compositions [PDF]

, 1996
The Mauna Loa (ML) and Mauna Kea (MK) lavas recovered by the Hawaii Scientific Drilling Project (HSDP) include aphyric to highly olivine-phyric basalts.
Alves, Sophie, Baker, Michael B., Stolper, Edward M.   +2 more
core   +1 more source

Mathematical Modeling of Measured Recalescence Velocities

Mathematical Methods in the Applied Sciences, Volume 49, Issue 2, Page 977-988, 30 January 2026.
ABSTRACT A moving‐boundary problem of synchronous directional and volumetric solidification in undercooled liquid drops is formulated and solved. Directional solidification is caused by the temperature gradient along the spatial direction, whereas volumetric growth of new phase elements is caused by the melt undercooling ahead of the phase transition ...
Dmitri V. Alexandrov, Eugenya V. Makoveeva, Alexandra E. Glebova, Liubov V. Toropova   +3 more
wiley   +1 more source

Shallow Magmatic System of Arxan Volcano Revealed by Ambient Noise Tomography with Dense Array

Applied Sciences
The Arxan Volcanic Field (AVF) is an active volcanic region in Northeast Asia, and its last eruption occurred approximately 2000 years ago. Its eruption mechanism remains unknown.
Lijuan Qu, You Tian, Cai Liu, Hongli Li
doaj   +1 more source

Plagioclase as evidence of magmatic evolution in the Zafarqand porphyry copper deposit, NE Isfahan

Journal of Economic Geology, 2018
Introduction Chemical and textural zoning patterns preserved in plagioclase phenocrysts can provide useful information on parameters that constrains the changing melt compositions in the magma systems.
Maryam Aminoroayaei Yamini , Faramarz Tutti, Mohammad Reza Aminoroayaei Yamini, Jamshid Ahmadian   +3 more
doaj   +1 more source

The Boycott effect in magma chambers [PDF]

Geophysical Research Letters, 2004
We investigate the plausibility of the stratified Boycott effect as a source of layering in magma chambers. Crystal settling within the magma chamber will generate buoyant fluid near the sloping sidewalls whose vertical ascent may be limited by the ambient stratification associated with vertical gradients in SiO2.
F. Blanchette, T. Peacock, J. W. M. Bush
openaire   +1 more source

Seismological Evidence of Multiple Crustal Magma Reservoirs Beneath Mt. Wrangell in Southcentral Alaska

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract Recent studies have challenged the classical view of magma chambers as ephemeral, melt‐rich bodies confined to shallow depths beneath arc volcanoes at subduction zones. Instead, increasing evidence supports the existence of long‐lived, vertically extensive magmatic systems with persistent partial melts within the crust. Nevertheless, the depth
Qili Andy Dai, Haiying Gao, Sahria Nayon, Zane Michael Cleghorn, Cong Li   +4 more
wiley   +1 more source

Numerical Modeling Of Pressure Source Of Sinabung Volcano Based On GPS Data In 2011-2012 Using Particle Swarm Optimization (PS0)

Computational and Experimental Research in Materials and Renewable Energy, 2020
Mogi Model with particle swarm optimization (PSO) scheme have been applied to the local GPS data of Sinabung Volcano during 2011 to 2012 to receive subsurface parameters as pressure sources in terms of misfit and inversion model parameter.
Ratih Kumalasari, Wahyu Srigutomo, Irwan Meilano, Hendra Gunawan   +3 more
doaj   +1 more source

Abnormally Large Magma Flux Does Not Lead to Eruption in Subduction Zone Calderas: The 2022–2023 Episode of Uplift of Aniakchak Crater (Aleutians)

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract Observations of ground deformation provide insights on the triggering mechanisms of eruptions. At Aniakchak Crater (Aleutians) InSAR measured ∼ ${\sim} $72 cm of uplift in less than 7 months between 2022 and 2023. The uplift can be explained by the inflation of a point pressure source at a depth of 3.2 km.
Francisco Delgado
wiley   +1 more source

Volcano remote sensing with ground-based spectroscopy [PDF]

, 2005
The chemical compositions and emission rates of volcanic gases carry important information about underground magmatic and hydrothermal conditions, with application in eruption forecasting.
Burton M.R, Daag A.S, O'Dwyer M, Sparks R.S.J, Stoiber R.E, Symonds R.B   +5 more
core   +1 more source

Characterization of Crustal Deformation During the May 2021 Nyiragongo Eruption Using InSAR and GNSS Data

Geophysical Research Letters, Volume 53, Issue 1, 16 January 2026.
Abstract We analyze Interferometric Synthetic Aperture Radar (InSAR) and Global Navigation Satellite System (GNSS) data to characterize ground deformation and dike opening associated with the May 2021 Nyiragongo eruption. Despite documented eruptions in 1977 and 2002, Nyiragongo's magmatic system and its interaction with regional rifting remain poorly ...
D. Murekezi, A. Newman, C. Wauthier, C. J. Ebinger, P. Lundgren, J. Gonzalez Santana, T. Niyitegeka, G. Nyandwi, T. Habiyakare, J. Uwiduhaye   +9 more
wiley   +1 more source