Results 51 to 60 of about 2,132,735 (177)

The Indian Plate subducting below the Tibet Plateau is tearing apart

Communications Earth & Environment
The first-order configuration of the Himalayan orogen is defined by northward motion of the Indian plate, whether directly underplating Tibetan crust or subducting beneath a mantle wedge.
Lin Liu, Danian Shi, Simon L. Klemperer
doaj   +1 more source

Tracing Continental Basalt Sources and Mantle Processes Using Fe Stable Isotopes

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 8, August 2026.
Abstract Iron (Fe) isotopes have emerged as powerful tracers of mantle source heterogeneity and melting processes, yet the mechanisms producing heavy Fe isotope signatures (high δ57Fe values) in intraplate basalts remain debated. Competing interpretations include partial melting of recycled pyroxenite domains versus carbonate‐induced oxidation of a ...
Yi‐Shan Cheng, Jian‐Qiang Liu, Li‐Hui Chen, Xun Yu, Gang Zeng, Xiao‐Jun Wang, Zhao‐Yang He, Jian Zhao, Frances M. Deegan, Valentin R. Troll, Hong‐Fu Zhang   +10 more
wiley   +1 more source

Thermal and decompression history of the Lanzo Massif, northern Italy: Implications for the thermal structure near the lithosphere–asthenosphere boundary

Lithos, 2020
The lithosphere–asthenosphere boundary (LAB) is a zone where thermal, mechanical, and material interactions take place between the conductive mantle and the underlying convective mantle, and it plays an important role in plate tectonics. In this paper we
Tomo Aoki, K. Ozawa, J. Bodinier, F. Boudier, Yuto Sato   +4 more
semanticscholar   +1 more source

Thermochemical Controls on the X, 410, and 660 Discontinuities in the Central Mediterranean

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 8, August 2026.
Abstract The mantle beneath the Central Mediterranean is thermally and compositionally heterogeneous, as indicated by fragmented and locally stagnant slabs in tomographic images and HIMU‐like anorogenic magmatism. Mantle discontinuities are sensitive to both temperature and composition, and thus provide a way to quantify these heterogeneities.
Luciana Bonatto, Stephen Monna, Caterina Montuori, Claudia Piromallo, Vernon Cormier   +4 more
wiley   +1 more source

Multi‐Scale Spatial Variations in Pacific Mantle Seismic Anisotropy: Constraints on Plate Evolution and Asthenospheric Flow

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 8, August 2026.
Abstract We present array‐scale (∼500 × 500 km) anisotropic shear‐velocity models from two Pacific ocean‐bottom seismometer (OBS) arrays of the OBS Research in the Convecting Asthenosphere (ORCA) experiment: Young ORCA (∼43 Ma) and Old ORCA (∼90 Ma). Rayleigh‐wave phase velocities spanning 5–150 s are combined with Love‐wave phase velocities from 5 to ...
Joseph H. Phillips, James B. Gaherty, Joshua B. Russell, Zachary C. Eilon, Donald W. Forsyth, Joseph S. Byrnes   +5 more
wiley   +1 more source

Uplift of the Transantarctic Mountains: Evidence for an Evolving and Long‐Lived Rayleigh‐Taylor Instability

Tectonics, Volume 45, Issue 8, August 2026.
Abstract Rayleigh‐Taylor instabilities within the upper mantle are investigated as a mechanism for the uplift of rift‐margin mountain ranges within the continents. Our focus is on the Transantarctic Mountains (TAM). These mountains form at the margin between East and West Antarctica and have been free from the effects of subduction for about 500 ...
Tim Stern, Simon Lamb, James D. P. Moore, Alec Yates   +3 more
wiley   +1 more source

Active Tectonics of the Eastern and Southern Alps ‐ Crustal Response to Deep Processes? A Review

Tectonics, Volume 45, Issue 8, August 2026.
Abstract Owing to the low N‐S convergence rates between Adria and Europe, crustal deformation rates in the Alps and its forelands are low. Active tectonics are, therefore, difficult to study, especially as non‐tectonic landscape forming processes can erase or modify the tectonic surface imprint. Large‐scale and dense seismological data recently offered
Christoph Grützner, Gesa Petersen, Enrico Serpelloni, Sabrina Metzger, Jasper Moernaut, Kamil Ustaszewski, Jacek Szczygieł, Petra Jamšek Rupnik, Azam Jozi Najafabadi, Ajay Kumar, Andrea Piccolo, Blaž Vičič, Simone Cesca, Esther Hintersberger, Laurens Jan Hofman, Jörn Kummerow, Erick Prince, Klaus Reicherter, Christian Schuler, Gregor Rajh, Marcel Thielmann   +20 more
wiley   +1 more source

The electrical structure of the central Pacific upper mantle constrained by the NoMelt experiment

Geochemistry, Geophysics, Geosystems, 2015
The NoMelt experiment imaged the mantle beneath 70 Ma Pacific seafloor with the aim of understanding the transition from the lithosphere to the underlying convecting asthenosphere.
Emily Sarafian, Rob. L. Evans, John A. Collins, Jimmy Elsenbeck, Glenn A. Gaetani, James B. Gaherty, Greg Hirth, Daniel Lizarralde   +7 more
doaj   +1 more source

Tectonic Inheritance During Plate Boundary Evolution in Southern California Constrained From Seismic Anisotropy

Geochemistry, Geophysics, Geosystems, 2021
The style of convective force transmission to plates and strain‐localization within and underneath plate boundaries remain debated. To address some of the related issues, we analyze a range of deformation indicators in southern California from the ...
Vera Schulte‐Pelkum, Thorsten W. Becker, Whitney M. Behr, Meghan S. Miller   +3 more
doaj   +1 more source

Inversion by Intrusion: Magma‐Driven Shortening in the Turkana Rift (East Africa)

Tectonics, Volume 45, Issue 8, August 2026.
Abstract Late Pliocene to Pleistocene inversion in the Turkana Rift, observed on seismic reflection data and in outcrop, presents a tectonic paradox by indicating local shortening in an overall extensional setting. Previous studies attributed this inversion either to the reactivation of obliquely oriented structural weaknesses or to reorientation of ...
Ameha A. Muluneh, Chris K. Morley, Sascha Brune, Sibiao Liu, Anne C. Glerum, Rene Gassmöller, Marta Pérez‐Gussinyé   +6 more
wiley   +1 more source