Results 81 to 90 of about 4,071 (179)

Middle Cretaceous Andean‐Type Arc Evolution in the Sanandaj–Sirjan Zone (Shalair Valley), Iraq: New Geochronological and Geochemical Constraints

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 6, June 2026.
Abstract The middle Cretaceous granitoid plutons of the Shalair Valley, situated in northeastern Iraq, constitute a principal magmatic component of the Sanandaj–Sirjan Zone within the northwestern segment of the Zagros Orogenic Belt. Among these plutons, the equigranular Aulan body (AG) and the porphyritic Laladar body (LG) were crystallized at 111.0 ± 
Imad Kadhim Abdulzahra, Yoshihiro Asahara, Yousif Mohammad, Ayten Hadi   +3 more
wiley   +1 more source

The Seismic Signature of the Atlantis Massif Oceanic Detachment Fault Determined From Crystallographic Preferred Orientation and Microstructure

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 6, June 2026.
Abstract At slow‐spreading mid‐ocean ridges large scale detachment faults partly accommodate the spreading process. The mafic and ultramafic rocks at the ridges are infiltrated by water and change their mineralogy. Subsequently or contemporaneously to these reactions, detachment faulting takes place.
R. Kuehn, J. H. Behrmann, J. Kossak‐Glowczewski, B. Leiss, M. Stipp   +4 more
wiley   +1 more source

Complex Shear‐Wave Splitting Behavior in the Northern Andes and Possible Implications for Mantle Flow Around the Caldas Tear

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 6, June 2026.
Abstract We investigate shear‐wave splitting of SKS and SKKS phases from teleseismic earthquakes to study the anisotropic structure of the lithosphere and upper mantle beneath the Colombian Andes. This area is shaped by complex interactions between the subducting Nazca and Caribbean plates beneath the South American plate. A recent broadband deployment
Christopher J. W. Carchedi, Lara Wagner, Gaspar Monsalve, David S. Avellaneda‐Jiménez, Steven Golden   +4 more
wiley   +1 more source

Mapping normal faults on the outer slope of the western Kuril Trench based on recent seismic reflection and bathymetric data

Earth, Planets and Space
To obtain novel information regarding normal faults that could cause tsunamis and large earthquakes on the outer slopes of the Kuril Trench, recently acquired multichannel seismic reflection (MCS) and bathymetric data are processed in this study to ...
Tetsuo No, Shuichi Kodaira, Kentaro Imai, Koichiro Obana, Gou Fujie, Yasuyuki Nakamura, Kazuya Shiraishi, Ryo Miura, Masao Nakanishi   +8 more
doaj   +1 more source

Geodynamics [PDF]

Science, 1973
openaire   +2 more sources

Along‐Strike Seismic Structure of the Andreanof Aleutian Arc Segment and Implications for the Formation of Continental Crust

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 6, June 2026.
Abstract Crust formed in volcanic arcs is accreted to continents over geologic time, serving as the source material for new continental crust in Earth's present and recent past. Geochemically, arcs are found to be significantly more mafic than bulk continental crust.
Hannah F. Mark, Daniel Lizarralde, Donna J. Shillington, Valeria Cortés‐Rivas, Mark D. Behn   +4 more
wiley   +1 more source

Infrasound reveals detailed eruptive processes at Nyiragongo volcano and enhances monitoring capabilities during unrest periods

Communications Earth & Environment
Eruptions at continental basaltic volcanoes can take and combine various forms, including lava lakes, lava flows and fountaining, explosions or structural collapses.
Julien Barrière, Adrien Oth, Jelle Assink, Nicolas d’Oreye, Läslo Evers   +4 more
doaj   +1 more source

The Case for a Completely Solid Martian Mantle—No Basal Magma Layer Extant

Journal of Geophysical Research: Planets, Volume 131, Issue 6, June 2026.
Abstract Recent results from the Mars InSight mission suggested the existence of a molten silicate layer atop the core‐mantle boundary. Geophysical modeling of this layer suggested that it must be denser than the overlying mantle but less dense than the core, and have either a viscosity similar to that of the overlying solid mantle or a strong chemical
Megan S. Duncan, Scott D. King, Mathew B. Weller   +2 more
wiley   +1 more source

Arc Heat Flow and Magmatic Heat Budgets

Reviews of Geophysics, Volume 64, Issue 2, June 2026.
Abstract We evaluate hydrothermal heat loss from 11 volcanic‐arc segments (∼6,000 km of arc length, ∼10% of the global total), motivated by the observation that much magmatic heat ultimately crosses the land surface as heated aqueous fluid. Heat loss takes place by volcanic eruption, geothermal heat conduction to the surface, fumarolic (vapor ...
S. E. Ingebritsen, Kazuki Sawayama, Yuri Taran, Giovanni Chiodini, Tsuneomi Kagiyama, Hiroshi Shinohara, Julie V. Rowland, Benjamin A. Black   +7 more
wiley   +1 more source

Foreland Flexure and Lower Crustal Flow as Controls on Cenozoic Subsidence Anomalies in the Zengmu (Sarawak) Basin, South China Sea

Tectonics, Volume 45, Issue 6, June 2026.
Abstract While the evolution of individual passive marginal and foreland basins is well understood, the subsidence pattern of passive margins near convergence zones—where thrust loading overprints earlier extension and the typical wedge and foredeep are obscured—remains poorly understood.
Penggao Fang, Weiwei Ding, Zhibing Feng, Zhongxian Zhao   +3 more
wiley   +1 more source