Results 131 to 140 of about 35,184 (226)

Timing of Metamorphism and Deformation in the Neoarchean Quetico Metasedimentary Belt, Superior Craton, Constrained by Garnet Trace‐Element Mapping and Lu–Hf Geochronology

Journal of Metamorphic Geology, Volume 44, Issue 4, Page 265-286, May 2026.
ABSTRACT The Quetico subprovince of the Superior Province is among the largest metasedimentary belts globally and provides evidence of tectonic processes at play during the final stages of Archean cratonization. Although previous studies have shown that deformation and metamorphism of the 2.7‐Ga turbiditic protolith resulted in regional subvertical ...
Adrian G. Rehm, Antoine Godet, Doug Tinkham, Carl Guilmette, Matthijs A. Smit   +4 more
wiley   +1 more source

Oxidation state and metasomatism of the lithospheric mantle beneath the Rae Craton, Canada: strong gradients reflect craton formation and evolution. [PDF]

Sci Rep, 2021
Woodland AB, Gräf C, Sandner T, Höfer HE, Seitz HM, Pearson DG, Kjarsgaard BA.   +6 more
europepmc   +1 more source

Garnet–Clinopyroxene Double‐Layered Coronae in a Metagabbronorite From the High‐Grade Metamorphic Gföhl Unit, Moldanubian Zone

Journal of Metamorphic Geology, Volume 44, Issue 4, Page 311-336, May 2026.
ABSTRACT This study investigates garnet–clinopyroxene double‐layered coronae in a metagabbronorite from the high‐grade metamorphic Gföhl Unit (Bohemian Massif). The coronae formed at the interfaces between relic magmatic orthopyroxene, still preserved in the cores of the coronae, and the plagioclase‐rich rock matrix.
Rene Asenbaum, Tereza Nemeškalová, Martin Racek, Vojtěch Janoušek, Julian Portenkirchner, Rainer Abart   +5 more
wiley   +1 more source

Receiver Function Imaging of the Mantle Transition Zone Beneath the East Sayan Mountains and Adjacent Area in Central Asia: Implications for Lithospheric Drip and Intraplate Cenozoic Volcanism

Geophysical Research Letters
To provide constraints on the formation mechanisms of intracontinental volcanisms and intriguing lithospheric thickness variations in the East Sayan Mountains and surrounding areas, we stack P‐to‐s receiver functions to image the 410‐km and 660‐km ...
Yangyang Liao, Kelly H. Liu, Stephen S. Gao   +2 more
doaj   +1 more source

Regional‐to‐Global Tectonic and Trench‐Morphology Effects of Oceanic Plateau Subduction

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract Regional geodynamic modeling has shown that oceanic plateau subduction can modify the slab behavior. However, few studies have explored these interactions beyond 100 Myr in 3‐D spherical models. Using 3‐D spherical mantle convection models with self‐consistent plate‐like behavior, we investigate how the geometry and rheological properties of ...
Yang Liu, Nicolas Coltice, Laetitia Le Pourhiet, Ziyin Wu   +3 more
wiley   +1 more source

Is the Deep Martian Mantle Heterogeneous? A Reappraisal of Seismological Evidences

Geophysical Research Letters, Volume 53, Issue 7, 16 April 2026.
Abstract It has been proposed that the deep Martian mantle contains distributed heterogeneities preserved since the accretion of the planet. This result relies on a multiple‐scattering interpretation of frequency‐dependent arrival times of P $P$‐waves detected in the spectrograms of teleseismic Martian events.
L. Margerin
wiley   +1 more source

Crustal fault reactivation facilitating lithospheric folding/buckling in the central Indian Ocean

, 1996
High-quality, normal-incidence seismic reflection data confirm that tectonic deformation in the central Indian Ocean occurs at two spatial scales: whole lithosphere folding with wavelengths varying between 100 and 300 km, and compressional reactivation ...
Beekman, F., Bull, Jonathan M., Cloetingh, S., Scrutton, R.A.   +3 more
core   +1 more source

Heterogeneous Earth’s mantle drilled at an embryonic ocean

Nature Communications
Mantle processes control plate tectonics and exert an influence on biogeochemical cycles. However, the proportion of mantle sampled in-situ is minimal, as it is buried beneath igneous crust and sediments.
Alessio Sanfilippo, Ashutosh Pandey, Norikatsu Akizawa, Eirini Poulaki, Emily Cunningham, Manon Bickert, Chao Lei, Paola Vannucchi, Emily R. Estes, Alberto Malinverno, Noriaki Abe, Agata Di Stefano, Irina Y. Filina, Qi Fu, Swanne B. L. Gontharet, Lorna E. Kearns, Ravi Kiran Koorapati, Maria Filomena Loreto, Luca Magri, Walter Menapace, Victoria L. Pavlovics, Philippe A. Pezard, Milena A. Rodriguez-Pilco, Brandon D. Shuck, Xiangyu Zhao, Carlos Garrido, Daniele Brunelli, Tomoaki Morishita, Nevio Zitellini   +28 more
doaj   +1 more source

Upper mantle P velocity structure beneath the Midwestern United States derived from triplicated waveforms [PDF]

, 2012
Upper mantle seismic velocity structures in both vertical and horizontal directions are key to understanding the structure and mechanics of tectonic plates.
Chu, Risheng, Helmberger, Don V., Schmandt, Brandon   +2 more
core  

Author Correction: Lithospheric mantle buoyancy: the role of tectonic convergence and mantle composition. [PDF]

Sci Rep, 2020
Boonma K, Kumar A, Garcia-Castellanos D, Jiménez-Munt I, Fernández M.   +4 more
europepmc   +1 more source