Results 111 to 120 of about 92,567 (225)

Deep Origin and Shallow Launch for the Etna 122 B.C. Mafic Plinian Eruption

Geochemistry, Geophysics, Geosystems
Basaltic Plinian eruptions challenge our understanding of explosive volcanism. The 122 B.C. Plinian eruption of Etna ranks among the most powerful mafic explosive events known. Here, we combine volatile barometry of 122 B.C.
M. Gavrilenko, E. Gazel, K. Dayton, A. Barth, T. Plank, E. G. Huggins, B. Houghton   +6 more
doaj   +1 more source

Characterizing Incoming Cocos Plate Structure Outboard of the Guerrero Gap and Adjacent Segments Offshore Mexico: Implications for Along‐Strike Variations in Megathrust Slip Behavior

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 9, September 2026.
Abstract Megathrust slip behavior in subduction zones can vary along‐strike, yet the mechanisms driving this variability remain uncertain. The Middle America trench offshore Mexico provides an ideal setting to investigate the structural controls on megathrust slip behavior.
Davis Hagemeier, Anne Bécel, Tanner Acquisto, Víctor M. Cruz‐Atienza, Brandon Shuck, Donna J. Shillington, Shuoshuo Han, Brian Boston, Jorge A. Real, Yoshihiro Ito, Grace Ward   +10 more
wiley   +1 more source

Centrifuge experiments with magmatic systems : from melt segregation to pluton emplacement [PDF]

, 2011
In this thesis, laboratory investigations have been conducted to investigate several processes occurring during the melt segregation (crystal settling and compaction processes), as well as during emplacement of plutons.
Forien, Mélanie
core  

Building the Andean Crust at ∼35°S: Arc Geochemistry Reveals Cretaceous Thinning and Rapid Neogene Thickening

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract Quantification of the timing and mechanisms of crustal thickening in Cordilleran orogenic hinterlands remains challenging. We address this in the Andes using whole‐rock geochemistry and zircon petrochronology from a >70 Myr volcanic record in the Tinguiririca valley of Chile (∼35° ${}^{\circ}$S), which captures a pivotal transition from ...
Chance B. Ronemus, Caden J. Howlett, Peter G. DeCelles, Barbara Carrapa, Andrés Echaurren, Matías Barrionuevo, Jesse G. Mosolf, Michelle L. Foley, Mihai N. Ducea   +8 more
wiley   +1 more source

Implications of Thermal Weakening and Magma Compressibility for Volcano Monitoring

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract Magmatic intrusion and volcanic deformation are traditionally approximated with an inflating cavity in an elastic halfspace. Various analytical models predict surface displacement as a function of pressure or volume change, depth, and elastic crustal properties.
A. Spang, A. Piccolo, M. Gerbault, B. J. P. Kaus, M. Thielmann   +4 more
wiley   +1 more source

The role of magma ascent rates and viscosity in explosive and dome eruptions (Kelud volcano, Indonesia)

International audienceMagma ascent rate can control the hazard potential of an eruption, but it is difficult to directly determine. Here we investigate the variations in timescales and rates of magma ascent for the three most recent explosive and ...
Costa, Fidel, Humaida, Hanik, Utami, Sri Budhi   +2 more
core   +1 more source

Improved Half‐Space Cooling Model Reconciles Bathymetry and Thermal Evolution of the Southwest Subbasin, South China Sea

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract The bathymetry of marginal sea basins commonly deviates from depths calculated by classical lithospheric cooling models, yet the controlling mechanisms remain debated. Here, using 19 seismic profiles and corrected local heat‐flow data, we apply an improved half‐space cooling model within a two‐stage reconstruction to reassess thermal ...
Penggao Fang, Weiwei Ding
wiley   +1 more source

Thermo‐Mechanical Controls on Central‐Vent Caldera Collapse

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 9, September 2026.
Abstract Large‐scale magmatic systems are associated with catastrophic caldera‐forming eruptions, posing hazards to millions near active volcanoes. Despite occurring across a range of sizes, the physics driving caldera collapse remain incompletely understood. While large calderas have received considerable attention, moderately sized calderas (∼5–10 km)
Pascal S. Aellig, Albert de Montserrat, Boris J. P. Kaus   +2 more
wiley   +1 more source

Platinum-bearing chromite layers are caused by pressure reduction during magma ascent. [PDF]

Nat Commun, 2018
Latypov R, Costin G, Chistyakova S, Hunt EJ, Mukherjee R, Naldrett T.   +5 more
europepmc   +1 more source

Brine Entrainment During Ice Shell Growth on Icy Worlds

Journal of Geophysical Research: Planets, Volume 131, Issue 9, September 2026.
Abstract The role of ocean composition in governing ice shell growth and ocean longevity on icy satellites remains poorly constrained. To address this, we develop a thermomechanical model of small to mid‐sized icy worlds that simulates ice shell growth from a saline ocean, explicitly quantifying brine entrainment through a parameterization of reactive ...
Nina Gilkyson, Christian Huber, Erica Nathan, Jacob Buffo   +3 more
wiley   +1 more source