Results 61 to 70 of about 38,766 (189)

Mantle xenoliths in young intraplate volcanism: The mantle beneath the Arabian plate

, 2022
Mantle-derived xenoliths occurrence in volcanic rocks provide an opportunity to study deep mantle structures in specific geological settings. As direct samples of the mantle, xenoliths are information carriers of the lithospheric mantle nature at the ...
Homaidi, Hadi, Al Malallah, Murtadha, Follmann, Jörg, Jägerup, Beatrice, Garcia Paredes, Evelyn, Zivadinovic, Ivana, Van der Zwan, Froukje M.   +6 more
core   +1 more source

Seventeen Million Years of Episodic Volcanism Recorded Within the Geologist Seamounts: Implications for Tectonic Drivers of Intraplate Volcanism

Geochemistry, Geophysics, Geosystems
Upwelling and decompression of mantle plumes is the primary mechanism for large volumes of intraplate volcanism; however, many seamounts do not correlate spatially, temporally, or geochemically with plumes.
Brandon Scott, Kevin Konrad
doaj   +1 more source

OIB‐Type Garnet Amphibolites From the Xuerongzangbu Area, Central Lhasa Terrane, Tibet: Implications for Songduo Paleo‐Tethys Ocean Evolution and Permian Mantle Activity Along North Gondwana

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract Whether the Songduo metamorphic belt represents an in situ Paleo‐Tethyan suture within the Lhasa Terrane or far‐traveled allochthonous high‐pressure slices, and how Permian mantle activity along the North Gondwana margin relates to subsequent Tethyan evolution, remain central questions in Tibetan tectonics.
Yuan‐Bo Ma, Xin Jin, Yu‐Xiu Zhang, Zhi‐Wu Li, Shahbaz Bin Khalid, Ji‐Heng Zhang, Wen‐Guang Yang, Li‐Dong Zhu, Gang Tao, Kai‐Jun Zhang   +9 more
wiley   +1 more source

Thick Underplating and Buoyancy of the Bermuda Swell

Geophysical Research Letters
Bermuda is an intraplate ocean swell that does not conform to traditional mantle plume theory. Unlike other prominent bathymetric swells, such as Hawaii, it lacks age‐progressive volcanism, a deeply rooted mantle plume, and modern volcanism.
William D. Frazer, Jeffrey Park
doaj   +1 more source

Origin of Alkaline Basaltic Intrusive Rocks in an Exhumed Accretionary Complex: Implications for Past Petit‐Spot Volcanism in the Ocean

Geochemistry, Geophysics, Geosystems, 2023
Accreted basaltic rocks are expected to provide information on intraplate volcanism in the oceans. Basaltic rocks, originating from mid‐ocean ridges, plateaus, and seamounts, have been reported from exhumed accretionary complexes. However, basaltic rocks
Ginta Motohashi, Takashi Sano, Kohtaro Ujiie, Madison Frank   +3 more
doaj   +1 more source

Unraveling the Evolution of Silicic Volcanism in a Distributed Volcanic Field: Insights From Harrat Khaybar, Western Saudi Arabia

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 10, October 2026.
Abstract Distributed basaltic volcanic fields commonly host minor but significant silicic magmas, the origin of which remains debated. At Harrat Khaybar (western Saudi Arabia; ca. 1.7 Ma to present), volcanic activity erupted compositions range from alkali olivine basalt to trachyte and comendite.
Abdullah Alohali, Shanaka de Silva, Charles Lewis, Suhail S. Alhejji, Shane J. Cronin, Chris J. Russo   +5 more
wiley   +1 more source

Hafnium isotopic variations in East Atlantic intraplate volcanism [PDF]

Contributions to Mineralogy and Petrology, 2010
The broad belt of intraplate volcanism in the East Atlantic between 25° and 37° N is proposed to have formed by two adjacent hotspot tracks (the Madeira and Canary tracks) that possess systematically different isotopic signatures reflecting different mantle source compositions.
Geldmacher, Jörg, Hoernle, Kaj A., Hanan, Barry, Blichert-Toft, Janne, Hauff, Folkmar, Gill, James B., Schmincke, Hans-Ulrich   +6 more
openaire   +3 more sources

Low-velocity anomaly in the Coral Sea associated with subducting slabs and the Woodlark rift

Communications Earth & Environment
Classical plume models offer insights into intraplate volcanism and seamount chain formation by assuming a cylindrical upwelling of hot materials from the core-mantle boundary.
Ji-hoon Park, Sung-Joon Chang
doaj   +1 more source

Pliocene adakite-like accent of andesites and dacites from the Orlov volcanic field (Sakhalin Island)

Геосистемы переходных зон, 2021
Adakite-like geochemical signature (high Sr/Y ratio at a low Y concentration) is recognized in andesites and dacites, associated with intraplate basalts in the Orlov volcanic field of Sakhalin Island.
Sergei V. Rasskazov, Alexander V. Rybin, Artem V. Degterev, Irina S. Chuvashova, Tatyana A. Yasnygina, Elena V. Saranina   +5 more
doaj   +1 more source

BaSIC: A Bayesian Inversion Model for Basalt Source Investigation and Characterization

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 10, October 2026.
Abstract We present BaSIC: Basalt Source Investigation and Characterization, an open‐source Python based Bayesian inversion method to constrain the source mineralogy of basalts. Using bulk rock geochemistry, the model takes the averages and standard deviations of six elemental ratios (Mn/Fe, Zn/Fe, Mn/Zn, Sc/Zn, Co/Fe, and Ga/Sc) for a given basalt ...
E. H. Cunningham, S. Lambart, E. L. Brown   +2 more
wiley   +1 more source