Results 31 to 40 of about 1,425,422 (190)

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, Simon Day, Markus Schmid, Bruno Faria   +3 more
doaj   +1 more source

Fossilized solidification fronts in the Bushveld Complex argue for liquid-dominated magmatic systems

Nature Communications, 2020
Magma storage zones are debated to either be crystal-dominated mush zones or large liquid-dominated magma chambers. Here, the authors discover fossilized solidification fronts of magnetitite in the Bushveld pluton, which indicate nucleation and crystal ...
Willem Kruger, Rais Latypov
doaj   +1 more source

Combining Petrology and Seismology to Unravel the Plumbing System of a Typical Arc Volcano: An Example From Marapi, West Sumatra, Indonesia

Geochemistry, Geophysics, Geosystems, 2021
Marapi in Sumatra is characterized by frequent short‐lived explosions and small eruptions (Volcanic Explosivity Index 1–2) and in the past 250 years, the volcano has erupted >60 times.
D. Nurfiani, X. Wang, H. Gunawan, H. Triastuty, D. Hidayat, S. J. Wei, B. Taisne, C. Bouvet de Maisonneuve   +7 more
doaj   +1 more source

Experimental Simulations of Magma Storage and Ascent [PDF]

, 2017
One of the key issues in utilizing precursor signals of volcanic eruption is to reliably interpret geophysical and geochemical data in terms of magma movement towards the surface. An important first step is to identify where the magma is stored prior to ascent.
Martel, Caroline, Brooker, R., Andújar, Joan, Pichavant, Michel, Scaillet, Bruno, Blundy, J.   +5 more
openaire   +3 more sources

Magma storage at Ocean Islands: insights from Cape Verde [PDF]

, 2021
The Cape Verde archipelago is a group of Ocean Islands in the Central Atlantic that forms two chains of islands trending Northwest and Southwest. Several of the islands are considered to be volcanically active, with frequent eruptions on Fogo. We examine
Abigail K. Barker, Barker, Abigail,, Elin M. Rydeblad, Rydeblad, Elin, Silva, Sónia, Silva, Sónia M. D. M.,, Rydeblad, Elin M.,, Sónia M. D. M. Silva, Barker, Abigail   +8 more
core   +1 more source

Chemical differentiation, cold storage and remobilization of magma in the Earth’s crust [PDF]

Nature, 2018
The formation, storage and chemical differentiation of magma in the Earth's crust is of fundamental importance in igneous geology and volcanology. Recent data are challenging the high-melt-fraction 'magma chamber' paradigm that has underpinned models of crustal magmatism for over a century, suggesting instead that magma is normally stored in low-melt ...
Jackson, MD, Blundy, J, Sparks, RSJ
openaire   +3 more sources

Integrating field, textural, and geochemical monitoring to track eruption triggers and dynamics: a case study from Piton de la Fournaise [PDF]

Solid Earth, 2018
The 2014 eruption at Piton de la Fournaise (PdF), La Réunion, which occurred after 41 months of quiescence, began with surprisingly little precursory activity and was one of the smallest so far observed at PdF in terms of duration (less than 2 days ...
L. Gurioli, A. Di Muro, I. Vlastélic, S. Moune, S. Thivet, M. Valer, N. Villeneuve, N. Villeneuve, G. Boudoire, G. Boudoire, A. Peltier, P. Bachèlery, V. Ferrazzini, N. Métrich, M. Benbakkar, N. Cluzel, C. Constantin, J.-L. Devidal, C. Fonquernie, J.-M. Hénot   +19 more
doaj   +1 more source

New aspects of magma storage and transfer

Comptes Rendus. Géoscience, 2019
Magmatic processes have played, and still play, a key role in the evolution of Earth. Their surface manifestations via explosive eruptions that propel gases and ashes high into the atmosphere, or high-temperature geothermal fields that fuel power plants, continuously remind us that our planet is still active, striving daily to dissipate its internal ...
Scaillet, Bruno, Arbaret, Laurent, Gaillard, Fabrice   +2 more
openaire   +3 more sources

Disequilibrium response to tapping crustal magma reveals storage conditions. [PDF]

Nature
Abstract The conditions under which magma accumulates and is stored are fundamental to unravelling the processes of crust formation, planetary differentiation, geothermal heat recharge and volcanic eruptions.
Birnbaum J, Wadsworth FB, Kendrick JE, Kennedy B, Wallace PA, da Silva MM, Hess KU, Lavallée Y.   +7 more
europepmc   +2 more sources

Time scales and temperatures of crystal storage in magma reservoirs: implications for magma reservoir dynamics [PDF]

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences, 2019
The thermal and therefore physical state of magma bodies within the crust controls the processes and time scales required to mobilize magmas before eruptions, which in turn are critical to hazard assessment. Crystal records can be used to reconstruct magma reservoir histories, and the resulting time and length scales are converging with ...
openaire   +4 more sources