Results 81 to 90 of about 9,905 (218)

Slab‐Mantle Interaction During Subduction Initiation: Constraints From Trace Element and Sr‐Nd‐Pb Isotope Systematics of Boninite and Other Magmas and Metamorphic Sole in the Oman Ophiolite

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.
Abstract The Late Cretaceous Oman ophiolite includes a series of volcanic rocks generated during the transition from spreading ridge to protoarc associated with subduction initiation. We analyzed major and trace elements and Sr, Nd, and Pb isotope compositions of lavas and dikes of the protoarc stage, especially boninites. We also analyzed amphibolites
Tsuyoshi Ishikawa, Kazuya Nagaishi, Kyoko Kanayama, Keitaro Kitamura, Shigeyuki Wakaki, Yuki Kusano, Susumu Umino   +6 more
wiley   +1 more source

Large-scale mantle metasomatism: a Re–Os perspective [PDF]

Earth and Planetary Science Letters, 2004
There is a debate on the behavior of Re and Os during mantle metasomatism. Some argue that the mantle can acquire high 187Os/188Os (0.15 to >1.0) either directly from metasomatic events or by the growth of 187Os from 187Re over time. However, any suggestions of subduction-related Os metasomatism producing whole-scale elevation of the mantle to 187Os ...
John Chesley, Kevin Righter, Joaquin Ruiz   +2 more
openaire   +1 more source

Heterogeneous Mantle Metasomatism Controlled by Continental Subduction: Evidence From Post‐Collisional Mafic Rocks in the North Qaidam Orogen

Geochemistry, Geophysics, Geosystems
Post‐collisional mafic rocks not only record geodynamic processes at the end of the orogenic cycle but also retain various clues regarding preceding interactions between subducted slabs and mantle wedges.
Xiangyu Gao, Shengyao Yu, Yu Qi, Lintao Wang, Chuanzhi Li, Xiaocong Jiang, Xingzhou Jiang, Yang Yu   +7 more
doaj   +1 more source

Carbonatite Versus Silicate Melt Metasomatism Impacts Grain Scale 87Sr/86Sr and 143Nd/144Nd Heterogeneity in Polynesian Mantle Peridotite Xenoliths

Geochemistry, Geophysics, Geosystems, 2021
The Earth's upper mantle is isotopically heterogeneous over large lengthscales, but the lower limit of these heterogeneities is not well quantified. Grain scale trace elemental variability has been observed in mantle peridotites, which suggests that ...
Benjamin L. Byerly, M. G. Jackson, M. Bizimis   +2 more
doaj   +1 more source

Mantle Transition Zone Topography in New Zealand From Teleseismic P $P$‐Wave Receiver Functions

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 2, February 2026.
Abstract The geology of New Zealand has been shaped by tectonic plate interactions driven by mantle convection over the past 60 million years, but the effects of these interactions on the transition to the lower mantle are not yet well understood. We analyze 10 years of teleseismic P $P$‐wave receiver functions using common conversion point stacking to
Quan Zhang, Pascal Audet, Martha Savage, Rupert Sutherland, Tim Stern   +4 more
wiley   +1 more source

Tectonic significance of changes in post-subduction Pliocene-Quaternary magmatism in the south east part of the Carpathian-Pannonian Region [PDF]

, 2010
The south-eastern part of the Carpathian–Pannonian region records the cessation of convergence between the European platform/Moesia and the Tisza–Dacia microplate.
Alexandru Szakács, Bada, Balla, Behrmann, Bertotti, Burov, Chalot-Prat, Ciulavu, Cloetingh, Cloetingh, Csontos, Defant, Demetrescu, Demetrescu, Downes, Duggen, Dérerova, Embey-Isztin, Embey-Isztin, Faccenna, Faccenna, Fielitz, Fodor, Fuchs, Gméling, Gröger, Gvirtzman, Gîrbacea, Gîrbacea, Harangi, Harangi, Harangi, Harangi, Hauser, Heidbach, Hilary Downes, Horváth, Horváth, Houseman, Ioan Seghedi, Ismail-Zadeh, Ivan, Jarosinski, Knapp, Konečný, Krézsek, Leever, Linzer, Liviu Maţenco, Lustrino, Martin, Mason, Mason, Mason, Maţenco, Maţenco, Maţenco, Mo, Morley, Negrete-Aranda, Nemčok, Nemčok, Oncescu, Oncescu, Pallares, Panaiotu, Paul R.D. Mason, Peccerillo, Peccerillo, Pharaoh, Pinter, Plašienka, Popa, Pécskay, Pécskay, Rosenbaum, Royden, Royden, Roşu, Russo, Sacks, Sanders, Schmid, Schott, Seghedi, Seghedi, Seghedi, Seghedi, Seghedi, Seghedi, Seghedi, Seghedi, Sperner, Szakács, Szakács, Szakács, Szakács, Szakács, Săndulescu, Săndulescu, Tari, Tari, Turner, Tărăpoancă, Ustaszewski, Vaselli, Vasiliev, Vinkler, Wenzel, Wortel, Xiao, Ziegler, Zoltán Pécskay   +112 more
core   +2 more sources

Heat and Tectonics of the Canadian Cordillera From the Seismically Constrained Inversion of Gravity Data

Tectonics, Volume 45, Issue 2, February 2026.
Abstract An updated approach to seismically constrained modeling of gravity data reveals two broad, NW‐trending low‐density zones in the mantle lithosphere beneath the Canadian Cordillera. The low‐density zones coincide with a shallow lithosphere‐asthenosphere boundary (LAB), a shallow Curie‐point depth, and the location of Quaternary volcanoes.
Nathan Hayward, Tark S. Hamilton
wiley   +1 more source

Characterizing Martian Primary Crustal Compositions With Gamma Ray Spectroscopy

Geophysical Research Letters, Volume 53, Issue 2, 28 January 2026.
Abstract Mars's global‐scale chemical maps of the midlatitudes, derived from Mars Odyssey gamma and neutron spectroscopy, have constrained martian geology across a multitude of processes. However, the chemical maps are often used to analyze pre‐defined regions based on mapped geology and/or mineralogy.
Carlos E. Gary‐Bicas, Suniti Karunatillake, James J. Wray, Scott M. Perl, Alka Rani, Emmy B. Hughes   +5 more
wiley   +1 more source

Seismic anisotropy of Precambrian lithosphere : Insights from Rayleigh wave tomography of the eastern Superior Craton [PDF]

, 2017
The seismic data used in this study are freely available from the CNDC (Canadian National Data Centre for Earthquake Seismology and Nuclear Explosion Monitoring) and IRIS DMC (Data Management Center) via their data request tools.
Lee S., Nolet G., Sato Y., Snieder R., Vinnik L., Wardle R. J.   +5 more
core   +2 more sources

Cooling‐Induced Rheological Weakening Along the Nascent Plate Interface—A Mechanism for Catastrophic Subduction Initiation?

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.
Abstract Subduction initiation often begins with slow, forced convergence, switches “on” catastrophically as the slab collapses into the mantle, and then evolves to steady‐state, self‐sustained sinking that drives global plate movements. Numerical models suggest that the collapse phase implies sudden weakening of the plate interface.
Alissa J. Kotowski, Caroline E. Seyler, James D. Kirkpatrick, Douwe J. J. van Hinsbergen   +3 more
wiley   +1 more source