Results 41 to 50 of about 18,310,087 (195)

Deep into magma plumbing systems: Interrogating the crystal cargo of volcanic deposits

Geology, 2018
Volcanic units and their crystals carry a memory of hidden magma reservoirs. Here, through a statistical assessment of a worldwide compilation of volcanic bulk-rock and associated mineral data, we can quantify the proportion of crystals that appear in disequilibrium with their bulk-rock composition, over a large range of temperature conditions and ...
/Ganne, Jérôme, Bachmann, O., Feng, X.
openaire   +3 more sources

A System Dynamics Approach to Understanding the deep Magma Plumbing System Beneath Dominica (Lesser Antilles) [PDF]

, 2020
To understand the dynamics of magmatic systems, one must first seek to characterize the time-dependent behavior of magma storage and ascent. Herein, we do this through a combination of the Crystal System Approach and careful study of Fe-Mg interdiffusion
Ostorero, Léa, Morgan, Daniel Joseph, Solaro, C, Martel, C, Ostorero, L, Martel, Caroline, Solaro, Clara, Balcone-Boissard, Hélène, Boudon, G, Morgan, DJ, Boudon, Georges, Balcone-Boissard, H   +11 more
core   +1 more source

Seismic imaging and petrology explain highly explosive eruptions of Merapi Volcano, Indonesia

Scientific Reports, 2018
Our seismic tomographic images characterize, for the first time, spatial and volumetric details of the subvertical magma plumbing system of Merapi Volcano. We present P- and S-wave arrival time data, which were collected in a dense seismic network, known
S. Widiyantoro, M. Ramdhan, J.-P. Métaxian, P. R. Cummins, C. Martel, S. Erdmann, A. D. Nugraha, A. Budi-Santoso, A. Laurin, A. A. Fahmi   +9 more
doaj   +1 more source

Estimation of Pre-eruptive Magma Ascent Using a Hydrokinetic Model of Magma Plumbing System

Recent Advances in Exploration Geophysics, 2012
We have developed a hydrokinetic model of magma plumbing system to illustrate pre-eruptive magma migration and accumulation. The pre-eruptive magma flow is not observable but computable using both a magma flow simulation and ground deformation. For this purpose, ground deformation on April 9, 2009 at the Showa crater of Sakurajima Volcano was used ...
S. Minami, M. Iguchi, H. Mikada, T. Goto, J. Takekawa   +4 more
openaire   +2 more sources

Mount Etna: Geochemical signals of magma ascent and unusually extensive plumbing system

, 2003
Five years of gas monitoring from selected sites suggest that Mt Etna’s plumbing system is much more extensive than previously reported. It extends at least 40 km SW from the volcano’s boundary along the NE-SW regional fault, where it discharges about ...
Caracausi, A., Nuccio, P. M., Italiano, F., Paonita, A., Giammanco, S., Pecoraino, G., Rizzo, A., Favara, R.   +7 more
core   +1 more source

Large silicic magma chambers at the Moho depth characterize the multi-level plumbing system of back-arc spreading ridges

, 2023
The plumbing system of volcanoes in crustal convergent settings consists of vertically superimposed, sill-like reservoirs. The shallower reservoirs are generally filled by less dense and SiO2-richer magmas.
Ventura, Guido, Cocchi, Luca, Gennaro, Emanuela, Iezzi, Gianluca, Ventura G., Gennaro E., Cocchi L., Iezzi G.   +7 more
core   +1 more source

A complex magmatic plumbing system beneath the subvolcanic mafic sill intrusions, Gabal Qatrani, Faiyum Depression, NW Desert, Egypt: Evidence from mineral textures, zoning and chemistry

Geosystems and Geoenvironment
Neogene subvolcanic sills of tholeiitic basalt from Gabal Qatrani, Faiyum Depression, NW Desert, Egypt, represent composite intrusions of monogenetic sequences that are related to Red Sea rifting.
Ezz El Din Abdel Hakim Khalaf, Takashi Sano   +1 more
doaj   +1 more source

Lava dome cycles reveal rise and fall of magma column at Popocatépetl volcano

Nature Communications, 2023
Lava domes exhibit highly unpredictable and hazardous behavior, which is why imaging their morphological evolution to decipher the underlying governing mechanisms remains a major challenge. Using high-resolution satellite radar imagery enhanced with deep-
Sébastien Valade, Diego Coppola, Robin Campion, Andreas Ley, Thomas Boulesteix, Noémie Taquet, Denis Legrand, Marco Laiolo, Thomas R. Walter, Servando De la Cruz-Reyna   +9 more
doaj   +1 more source

Evolution of Summit Magma Pressure During the 2018 Caldera Collapse at Kīlauea Volcano

Geophysical Research Letters, Volume 53, Issue 21, 16 November 2026.
Abstract We utilized geodetic data from the 16 May to 4 August 2018 caldera collapse sequence to refine the geometries and pressure evolution of two summit reservoirs at Kīlauea volcano: the shallower Halema‘uma‘u (HMM) and deeper South Caldera (SC) reservoirs.
Eric Berg, Taiyi A. Wang, Elizabeth Wig, Paul Segall, Kyle Anderson   +4 more
wiley   +1 more source

Preferential Orientations of Subjovian Patera and Northern Hemisphere Mountain Populations on Io

Journal of Geophysical Research: Planets, Volume 131, Issue 11, November 2026.
Abstract Io's surface hosts numerous mountains and volcanic paterae generated by processes that occur at depth, including tidal heating and the resultant crustal recycling and subsidence stresses. Global trends in the shape and orientation of surface features could provide insight into these subsurface processes.
C. H. Seeger, K. de Kleer
wiley   +1 more source