Results 41 to 50 of about 411 (170)

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

Depositional and stratigraphic evolution of a Permian megalake system: Implications for seiche‐influenced models

The Depositional Record, Volume 12, Issue 2, April 2026.
During the Late Permian, the rise of the Gondwanides Belt trapped marine waters, giving birth to a vast megalake. This lake shifted between overfilled, balanced‐fill and underfilled stages that are recorded by high‐frequency accommodation changes, while meteorological seiches shaped the sedimentary dynamic and produced heterolithic beds.
B. Christofoletti, L. V. Warren, F. G. Varejão, M. G. Rodrigues, M. G. Simões, D. V. Palcu, M. L. Assine   +6 more
wiley   +1 more source

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

Climax of Late Paleoproterozoic Rift‐Related Magmatism in the Columbia Supercontinent: Insights From a 1.77–1.76 Ga Large Igneous Province of the Dunhuang Block, Northwest China

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract Widespread mafic magmatism at ca. 1.8–1.7 Ga across fragments of the Columbia supercontinent records a transition in the Earth's supercontinent cycle. The paleogeographic position of the Dunhuang Block in northwestern China within Columbia, and its role in this tectonic reorganization, remain controversial.
Masumeh Sargazi, Chuan‐Lin Zhang, Xian‐Tao Ye, Zhi‐Hao Song, Hong‐Ran Wang   +4 more
wiley   +1 more source

Focused Mantle Upwelling Beneath the Southeastern Asian Basalt Province Revealed by Seismic Surface Wave Tomography

Geophysical Research Letters
Following the termination of seafloor spreading in the South China Sea (SCS) basin, abundant intraplate volcanism widely spreads in the Indochina block, SCS basin, and Leiqiong area, forming the Southeastern Asian Basalt Province (SABP).
Xingli Fan, Zhen Guo, Ling Chen, Qi‐Fu Chen, Ting Yang, Chuntao Liang   +5 more
doaj   +1 more source

Asthenospheric flow through the Izanagi-Pacific slab window and its influence on dynamic topography and intraplate volcanism in East Asia

Frontiers in Earth Science, 2022
The tectonics of East Asia are notoriously complex. Consisting of an intricate patchwork of microplates and accreted terranes, even the Cenozoic tectonic history of the region remains controversial, and many differing reconstructions have been proposed ...
Hamish Brown, Lorenzo Colli, Hans-Peter Bunge   +2 more
doaj   +1 more source

Tracking Deep Magma Migration Through Diffuse CO2 Degassing: Insights From Piton de la Fournaise Volcano (2013–2023)

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract Volcano monitoring requires identifying and distinguishing physico‐chemical processes at various depths within magma plumbing systems and their links to volcanic activity. Long‐term monitoring of deep magma reservoirs, extending down to tens of kilometers, is crucial even though signals from these depths are often altered or attenuated before ...
B. Bénard, A. Di Muro, A. Finizola, A. Peltier, V. Ferrazzini, I. Vlastelic, P. Besson, V. Famin, R. Gusset, K. Mussard, P. Kowalski, P. Boissier, C. Brunet, F. Lauret, N. Desfete, C. Griot, M. Liuzzo, S. Gurrieri, G. Giudice, F. Grassa, M. Longo   +20 more
wiley   +1 more source

Active Plume, Abandoned Ridge, or Ancient Slab? olivine‐Hosted Melt Inclusions Record the Mantle Melting Conditions Below the East Pacific Revillagigedo Archipelago, Mexico

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 4, April 2026.
Abstract The voluminous active volcanoes of the Revillagigedo Islands of Socorro and San Benedicto in the east Pacific Ocean exhibit hotspot geochemistry. However, the presence of a deep mantle plume has not been seismologically confirmed. Instead, a fossil subducted slab is identified in the lower mantle underneath the volcanoes. Moreover, the islands
Janne M. Koornneef, Laurens J. J. Tromp, Igor K. Nikogosian, Eva M. Barning, Arwen Deuss, Yamirka Rojas‐Agramonte, Pablo Davilla Harris, Douwe J. J. van Hinsbergen   +7 more
wiley   +1 more source

Thermal Structure of Eastern Australia's Upper Mantle and Its Relationship to Cenozoic Volcanic Activity and Dynamic Topography

Geochemistry, Geophysics, Geosystems, 2021
Spatio‐temporal changes of upper mantle structure play a significant role in generating and maintaining surface topography. Although geophysical models of upper mantle structure have become increasingly refined, there is a paucity of geologic constraints
P. W. Ball, K. Czarnota, N. J. White, M. Klöcking, D. R. Davies   +4 more
doaj   +1 more source

On the origin of recent intraplate volcanism in Australia

Geology, 2014
Many intraplate volcanic provinces do not appear to originate from plate-boundary processes or upwelling mantle plumes. Edge-driven convection (EDC), where a small-scale convective instability (induced by local variations in lithospheric thickness) displaces hot mantle material upward, provides an alternative hypothesis for such volcanism.
Davies, Rhodri, Rawlinson, Nicholas
openaire   +2 more sources