Results 61 to 70 of about 286 (180)

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

Magmatic evolution and architecture of an oceanic intraplate volcano: Vesteris Seamount, Atlantic Ocean

Frontiers in Earth Science
Vesteris is a large (33 × 27 km) and young (summit age: 0.65–0.010 Ma) intraplate seamount in the Greenland Sea, formed from ocean island basalt (OIB) magmatism.
L. Beloša, D. T. Murphy, T. Ubide, S. Callegaro, C. M. Meyzen, M. Bizimis, A. Mazzini, A. Mazzini   +7 more
doaj   +1 more source

Picroilmenites in Yakutian kimberlites: variations and genetic models [PDF]

Solid Earth, 2014
Major and trace element variations in picroilmenites from Late Devonian kimberlite pipes in Siberia reveal similarities within the region in general, but show individual features for ilmenites from different fields and pipes.
I. V. Ashchepkov, N. V. Alymova, A. M. Logvinova, N. V. Vladykin, S. S. Kuligin, S. I. Mityukhin, H. Downes, Yu. B. Stegnitsky, S. A. Prokopiev, R. F. Salikhov, V. S. Palessky, O. S. Khmel'nikova   +11 more
doaj   +1 more source

Olivine‐Ahrensite Phase Relations in the Mg2SiO4‐Fe2SiO4 System as a Function of Temperature

Journal of Geophysical Research: Solid Earth, Volume 131, Issue 1, January 2026.
Abstract Olivine and ahrensite are the primary components of the interiors of Fe‐rich terrestrial planets and meteorites, making their phase relations crucial for planetary science. Moreover, their phase relations can be used for calibrating large‐volume high‐pressure devices such as multi‐anvil apparatus.
Artem Chanyshev, Dmitry Bondar, Lin Wang, Hongzhan Fei, Noriyoshi Tsujino, Yunke Song, Naira Martirosyan, Amrita Chakraborti, Eun Jeong Kim, Hu Tang, Shrikant Bhat, Robert Farla, Tomoo Katsura   +12 more
wiley   +1 more source

Lithospheric origin of a diamond from the Rio Sorriso area, Mato Grosso State, Brazil

Frontiers in Geochemistry
Diamonds are unique samples that enlarge our vision of the physical and chemical reactions occurring in Earth’s deep, inaccessible mantle. By investigating the minerals and fluids trapped within them, it is possible to ascertain the key conditions ...
A. Angellotti, G. Marras, M. Morana, S. Chariton, V. Stopponi, L. Medeghini, C. Romano, A. Correale, L. Bindi, F. V. Kaminsky, V. Stagno, V. Stagno   +11 more
doaj   +1 more source

Subduction and Extrusion of an Ultra‐High Pressure Oceanic Plate Interface (Lower Shear Zone, Monviso Massif, Western Alps)

Tectonics, Volume 45, Issue 1, January 2026.
Abstract The Lower Shear Zone (LSZ) of the Monviso Massif (Western Alps) constitutes a block‐in‐matrix remnant of the subduction plate interface, now tectonically emplaced into the Western Alpine orogenic belt. Here, we combine observations from cartographic to microscopic scales, focusing on garnet‐bearing lithologies in both the mafic blocks and the ...
Emanuele Scaramuzzo, Michele Locatelli, Alessia Borghini, Federica Boero, Mattia Gilio, Franz Livio, Marco Bruno, Marco Scambelluri, Stefano Ghignone   +8 more
wiley   +1 more source

An Inverse Method for Quantifying Petrological Parameters and Uncertainty in Phase Equilibrium Modelling

Journal of Metamorphic Geology, Volume 44, Issue 1, Page 70-84, January 2026.
ABSTRACT Phase equilibrium modelling offers a powerful quantitative framework for understanding petrological processes. Yet, many studies still rely on qualitative comparisons between natural datasets and these forward modelled predictions to constrain model parameters, commonly pressure–temperature (P–T) conditions.
T. Mackay‐Champion, I. P. Cawood
wiley   +1 more source

Textural and geochemical diversity of impact melt rock clasts in Apollo 16 sample 67015: Implications for the provenance of impact ejecta in the lunar highlands

Meteoritics &Planetary Science, Volume 61, Issue 1, Page 39-63, January 2026.
Abstract Apollo sample 67015 has been classified as a fragmental breccia comprised of highlands‐type clasts and is proposed to be the most complex Apollo 16 sample. 67015 is dominated by impact melt rock clasts that display a variety of textures, which have been previously interpreted to be indicative of multiple impact events.
Tara S. Hayden, Gordon R. Osinski
wiley   +1 more source

Mineral Chemistry and Thermobarometry of the Volcanic Rocks in Torud, Iran

Open Journal of Geology, 2014
This paper elucidates the compositional studies on clinopyroxene, plagioclase of basalts to andesitic rocks of Torud area to understand the geotectonic and geothermobarometry conditions. Early Eocene-Oligocene calc-alkaline volcanic rocks are exposed around Torud in the Central Iranian zone.
Elham Shah Hosseini, Afshin Ashja Ardalan, Mohammad Hashem Emami, Mohammad Hossein Razavi   +3 more
openaire   +2 more sources

The relaxation of residual inclusion pressure and implications to Raman-thermobarometry [PDF]

, 2019
Abstract. Residual pressure can be preserved in mineral inclusions, e.g. quartz-in-garnet, after exhumation due to differential expansion between inclusion and host crystals. Raman spectroscopy has been applied to infer the residual pressure and provides information on the entrapment temperature and pressure conditions.
Xin Zhong, Evangelos Moulas, Lucie Tajčmanová   +2 more
openaire   +1 more source