Results 61 to 70 of about 858 (191)

Weathering of the Emeishan Large Igneous Province Enhanced the Nutrient Flux to the Oceans and Led to Late Permian Climate Cooling

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract Mafic continental large igneous provinces (LIPs) erupted rapidly and may have overwhelmed Earth's atmospheric and biospheric systems. However, the exact balance and interplay between short‐term climate warming caused by CO2 emissions and long‐term cooling due to LIP weathering remains poorly understood.
Kunyue Ling, Hanjie Wen, Shengtao Gong, Ce Chen, Shengjiang Du, Runsheng Yin   +5 more
wiley   +1 more source

Subduction Initiation Volcanism Leading to Development of the Talkeetna Arc, Lower Shuyak Formation, Kodiak Archipelago, Alaska

Tectonics, Volume 45, Issue 4, April 2026.
Abstract Our understanding of subduction initiation remains limited by the difficulty of making direct observations of geologically recent examples. In the geologic record, supra‐subduction zone ophiolites are often interpreted to record syn‐initiation slab rollback and upper plate extension. Unfortunately, many ophiolites are decoupled from records of
B. M. Keough, M. P. Eddy, K. D. Ridgway, W. Crain   +3 more
wiley   +1 more source

Lithostratigraphy, geology and geochemistry of the volcanic rocks of the Vaigat Formation on Disko and Nuussauaq, Paleocene of West Greenland, Chemical analyses, supplementary data.

Geological Survey of Denmark and Greenland Bulletin, 2017
Supplementary data to GEUS Bulletin 39 Lithostratigraphy, geology and geochemistry of the volcanic rocks of the Vaigat Formation on Disko and Nuussuaq, Paleocene of West Greenland.
Asger Ken Pedersen, Lotte Melchior Larsen, Gunver Krarup Pedersen   +2 more
doaj  

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

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

Origins of compositional heterogeneity in olivine-hosted melt inclusions from the Baffin Island picrites

, 2015
The Baffin Island picrites are highly magnesian (< 22 wt% MgO) olivine tholeiites, erupted through felsic continental crust. Plots of most major and minor element oxides against MgO for the lavas define very tight trends consistent with modification of ...
Kaminska, M, Kamenetsky, Vadim S, Francis, Don, Yaxley, Gregory, Norman, Marc   +4 more
core   +1 more source

Substitution of Fe3+ into anorthite in oxidized, Al‐deficient ferrobasaltic systems with implications for the petrogenesis of angrite meteorites

Meteoritics &Planetary Science, Volume 61, Issue 3, Page 427-443, March 2026.
Abstract Angrite meteorites are critically silica‐undersaturated igneous rocks with high Ca/Al and Fe/Mg, along with depletion in volatile lithophile elements Na and K such that they crystallize anorthite along with olivine and calcic pyroxene. The anorthite in angrites contains substantial Fe, and in NWA 1670 and NWA 1296, it is present at major ...
Seann J. McKibbin, Dominique Tanner, Hugh St. C. O'Neill   +2 more
wiley   +1 more source

Evolution of the Source Mineralogy and Lithospheric Controls on Magmatism During the Northeast Atlantic Continental Breakup

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 2, February 2026.
Abstract The mid‐Norwegian Margin, part of the North Atlantic Igneous Province (NAIP), is a well‐studied volcanic rifted margin formed during the breakup between Greenland and Eurasia ∼56 Ma, with the largest accumulation of magmatic material hosted by the Vøring Margin section.
Emily H. Cunningham, Sarah Lambart, Pengyuan Guo, Sayantani Chatterjee, Christian Tegner, Autumn Hartley, Ashley M. Morris, Sverre Planke, Christian Berndt, Carlos A. Alvarez Zarikian, Peter Betlem, Henk Brinkhuis, Marialena Christopoulou, Eric C. Ferré, Irina Y. Filina, Joost Frieling, Dustin T. Harper, Morgan T. Jones, Jack Longman, John M. Millett, Geoffroy T. F. Mohn, Reed P. Scherer, Natalia Varela, Weimu Xu, Stacy L. Yager   +24 more
wiley   +1 more source

Copper isotope evidence for recycled crustal sulfides in deep mantle plume source

Communications Earth & Environment
Earth’s crustal materials are recycled into the mantle through subduction, but the depth and nature of recycled components remain debated. Here we report copper (Cu) isotope evidence for the involvement of recycled crustal materials in a deep-mantle ...
Junhua Yao, Wei Yuan, Zhengrong Wang, Frédéric Moynier, Wei-Guang Zhu, Ya-Dong Wu, Yuchen An, Jiubin Chen   +7 more
doaj   +1 more source

Viscosity of Dry and Hydrous Diopside Melts at High Pressures: Implications for Upper Mantle Magma Dynamics

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 12, December 2025.
Abstract Viscosity of silicate melts governs magma transport and influences mantle dynamics, yet effects of pressure and water on melt viscosity remain poorly understood. Here, we report in situ falling‐sphere viscosity measurements on diopside (Di) melts with 0–3 wt.% H2O along the liquidus up to 7 GPa and 2103 K using synchrotron X‐ray radiography ...
Qi Chen, Bin Zhao, Tony Yu, Aaron Wolfgang Ashley, Yanbin Wang   +4 more
wiley   +1 more source