Results 71 to 80 of about 3,902 (147)

Magma Paths of the Karthala and La Grille Volcanoes (Grande Comore) Revisited: New Evidence From Geomorphology and Geochemistry

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.
Abstract Grande Comore, the westernmost island within the Madagascar Comoros Volcanic (MCV) chain, hosts two juxtaposed basaltic volcanoes, Karthala and La Grille, with contrasting lava geochemical signatures and eruption frequencies. Their formation and dynamics have been explained either by a mantle plume or, more recently, as part of a ...
François J. P. Lötter, Nicolas Villeneuve, Andrea Di Muro, Nils Lenhardt, Laurent Michon, Pascale Besson, Hamid Soulé   +6 more
wiley   +1 more source

Eocene Lamproitic Magmatism in Gangdese: Melting Sub‐Arc Lithospheric Mantle and Implications for the Early Cenozoic Magmatic “Flare Up” in Southern Tibet

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.
Abstract The role of sub‐arc mantle lithosphere in the build‐up of a batholith is an outstanding issue that is still not well resolved. Lamproite is a mantle‐derived magmatic rock that provides a window to learn the composition and the enrichment processes of subcontinental lithospheric mantle (SCLM).
Y. H. Tian, L. S. Zeng, L. H. Zhao, L. L. Yan, G. X. Li   +4 more
wiley   +1 more source

3‐D Modeling of Differential Exhumation of Ultrahigh‐Pressure Metamorphic Rocks Driven by Increasing Plate Divergence

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.
Abstract Petrological and seismic constraints suggest differential sampling depth for ultrahigh pressure (UHP) metamorphic rocks exposed in different segments of the fossil subduction zone of the Western Alps. However, the mechanisms for the observed differential exhumation remain to be understood. Here, we account for the continental margin subduction
Xinxin Wang, Liang Zhao, Marco G. Malusà, Weiqiang Ji, Jie Yuan   +4 more
wiley   +1 more source

A Thermodynamic Framework for Turing‐Type Instabilities in Porous Media: Part I Theory

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.
Abstract Pattern formation in geological materials is commonly described using analogies to Turing‐type reaction–diffusion systems, yet a unifying thermodynamic explanation remains elusive. Here we develop a multiscale, thermodynamically consistent framework for pattern‐forming instabilities in porous media undergoing coupled thermo–hydro–mechanical ...
Klaus Regenauer‐Lieb, Manman Hu, Qingpei Sun, Chong Liu, Zhennan Zhu, Victor Calo   +5 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

Heat Advection During Exhumation Can Explain High Temperatures Along the Subduction Plate Interface

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.
Abstract The pressure–temperature (P−T) $(P-T)$ evolution of subduction zone plate interfaces governs metamorphism, fluid migration, deformation, and seismicity. Temperature estimates from natural rocks are frequently higher than those predicted by subduction models, particularly for P< $P< $ 2.5 GPa.
Stefan M. Schmalholz
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

Geochemical Analysis of Diachronous V‐Shaped Ridges and Troughs That Flank the Reykjanes Ridge South of Iceland

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.
Abstract It is recognized that mantle plumes play a direct role in generating regional uplift and producing immense volumes of basaltic magmatism, both of which can influence paleoclimate. The Icelandic Plume, beneath the North Atlantic Ocean, is of particular importance due to its size and position at a significant paleoceanographic gateway.
Nicky White, Chia‐Yu Tien, Callum Pearman, John Maclennan, Bramley Murton, Expedition 395 Scientists   +5 more
wiley   +1 more source

Cenozoic Subduction Polarity Reversal Within the Celebes Sea Inferred From Teleseismic Tomography

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.
Abstract Sulawesi and Borneo are tectonically complex islands with multistage subduction histories stretching back through the Cenozoic. Seismic studies have played an important role in helping to unravel this history, with spatial distributions of earthquakes tracking actively subducting slabs. In contrast, old or relict aseismic slabs are illuminated
Y. Li, N. Rawlinson, S. Pilia, L. Kesumastuti, C. Lü, S. Widiyantoro, T. Hao   +6 more
wiley   +1 more source

Comparing Slab Viscous Dissipation Under Slab Distributed Weakening and Slab Segmentation Scenarios

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 3, March 2026.
Abstract Subduction of cold, dense oceanic lithosphere is a key driver of plate tectonics and mantle convection. However, how much gravitational potential energy is internally dissipated by slab deformation during subduction remains debated and largely depends on the mechanisms of slab weakening.
Wenfa Zhou, Jiashun Hu, Keqing Li, Ting Yang   +3 more
wiley   +1 more source