Results 91 to 100 of about 1,707 (195)

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

Distinct Transcrustal Evolutions of Komatiitic Primitive Magma: Implications for the Compositional Dichotomy of Continental Flood Basalts

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract The origin of the compositional dichotomy between high‐Ti and low‐Ti basalts in continental flood basalt provinces remains debated. Most existing studies attribute this dichotomy directly to variations in primitive magma composition to circumvent the complexities of significant evolutionary processes, such as multiphase fractional ...
Zongpeng Yang, Tong Hou, Roman Botcharnikov, Evangelos Moulas, Meng Wang, Stephan Buhre, Zhaochong Zhang   +6 more
wiley   +1 more source

Seafloor evidence for pre-shield volcanism above the Tristan da Cunha mantle plume. [PDF]

Nat Commun, 2020
Geissler WH, Wintersteller P, Maia M, Strack T, Kammann J, Eagles G, Jegen M, Schloemer A, Jokat W.   +8 more
europepmc   +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
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.
Janne M. Koornneef, Laurens J. J. Tromp, Igor K. Nikogosian, Eva M. Barning, Arwen Deuss, Yamirka Rojas‐Agramonte, Pablo Davilla Harris, Douwe J. J. vanHinsbergen   +7 more
doaj   +1 more source

Emplacement of Venus' Crater Outflows as Impact Melt

Journal of Geophysical Research: Planets, Volume 131, Issue 8, August 2026.
Abstract Some of Venus' impact craters are associated with flow features that extend up to hundreds of kilometers from the crater rim, making these flows the longest crater outflows in the solar system. Various mechanisms of formation have been proposed including two end‐member hypotheses (the vapor cloud origin and the impact melt origin).
M. Borrelli, I. Ganesh, L. Bourg
wiley   +1 more source

Physics‐Informed Machine Learning Framework to Retroactively Estimate Mantle Thermal Convection From Partial Geophysical Observations

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 4, August 2026.
Abstract Mantle convection drives the solid Earth, powering plate motions, volcanism, and earthquakes while regulating planetary heat loss. Reconstructing its history is hampered by sparse, noisy observations concentrated near the surface and the present day. Here I develop an inverse physics‐informed neural network framework to estimate mantle thermal
Atsushi Nakao
wiley   +1 more source

Non‐Uniqueness, Symmetries and Invariance of Thermal History Modelling in Sedimentary Basins

Basin Research, Volume 38, Issue 4, July–August 2026.
This paper approaches non‐unique inverse problems by generating a representative ensemble of all possible solutions using the concept of symmetry. In the context of basin modelling, a symmetry is any manipulation of a forward model's parameters (e.g., thermal history) that leaves the model output (e.g., downhole vitrinite reflectance) unchanged ...
J. Xiao, D. Waltham, Y. Wang
wiley   +1 more source

Helium Isotope Variations in Gulf of Aden Basalts and the Surface Expression of Mantle Heterogeneity During Afar Plume—Triple Junction Interaction

Geochemistry, Geophysics, Geosystems
New helium isotope data for basalt glasses from the Gulf of Tadjoura and Gulf of Aden reveal a mantle plume signal that has 3He/4He up to 17 RA. In the Gulf of Aden, plume helium is detectable ∼380 km from the Afar triple junction, up to the Shukra El ...
D. W. Graham, P. J. Michael
doaj   +1 more source

Evolution Model for the Paleoproterozoic Talvivaara Mudstone‐Hosted Ni‐Zn‐Cu‐Co Deposit in Fennoscandia

Terra Nova, Volume 38, Issue 4, Page 221-232, August 2026.
ABSTRACT The Paleoproterozoic Talvivaara mudstone is a very large sulfidic Ni‐Co deposit that records enhanced organic matter accumulation during the global Shunga Event. Here, rock geochemistry and microscale S and Fe isotope composition of in situ pyrrhotites and pyrites are studied in well‐characterised, well‐preserved drill core samples.
Raimo Lahtinen, Jaakko J. Laitala, Joonas J. Virtasalo, Martin J. Whitehouse   +3 more
wiley   +1 more source

Drift of Plumes in the Mantle

, 2015
We quantified the fixity of mantle plumes relative to the mantle in high Rayleigh number numerical thermal convection with radiallyand temperature-dependent viscosity structures in a 3D spherical shell geometry. The relative velocities between plumes and the mantle increased with increasing Rayleigh number.
openaire   +2 more sources