Results 91 to 100 of about 6,694 (263)

Geodynamics of synconvergent extension and tectonic mode switching: Constraints from the Sevier-Laramide orogen [PDF]

, 2012
Many orogenic belts experience alternations in shortening and extension (tectonic mode switches) during continuous plate convergence. The geodynamics of such alternations are not well understood.
Cruz-Uribe, Alicia M., Hoisch, Thomas D., Vervoort, Jeffrey D., Wells, Michael L.   +3 more
core   +2 more sources

Reconciling Seismic and Thermo‐Chemical Models of Cratonic Lithosphere

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 2, February 2026.
Abstract Most published global and regional shear‐wave (VS ${V}_{\mathrm{S}}$) velocity models of cratons include a VS ${V}_{\mathrm{S}}$ increase with depth below the Moho, with a maximum at 100–150 km depth. This feature has long been debated, as it appears to require either (implausible) temperature decreases with depth, or substantial, layered ...
Sefira Davison, Sergei Lebedev, Yihe Xu, Sally Gibson, Chiara Civiero, Javier Fullea   +5 more
wiley   +1 more source

Magma storage and plumbing of adakite-type post-ophiolite intrusions in the Sabzevar ophiolitic zone, northeast Iran [PDF]

Solid Earth, 2015
Subduction-related adakite-type intrusive rocks emplaced into the late Cretaceous–Paleocene Sabzevar ophiolite zone, northeast Iran, range from Mg-andesite to rhyodacite in composition.
K. Jamshidi, H. Ghasemi, V. R. Troll, M. Sadeghian, B. Dahren   +4 more
doaj   +1 more source

The chemically zoned 1949 eruption on La Palma (Canary Islands): Petrologic evolution and magma supply dynamics of a rift zone eruption [PDF]

, 2000
The 1949 rift zone eruption along the Cumbre Vieja ridge on La Palma involved three eruptive centers, 3 km spaced apart, and was chemically and mineralogically zoned.
Abdel-Monem, Albarède, Ancochea, Andreas Klügel, Beattie, Bonelli Rubio, Boynton, Buening, Carmichael, Carracedo, Carracedo, Chaffey, Chakraborty, Chazot, Crank, Delaney, Dobosi, Duda, Duke, Fisk, Ford, Garbe-Schönberg, Garcia, Garcia, Green, Hans-Ulrich Schmincke, Hansteen, Hart, Hausen, Hernandéz-Pacheco, Hernandéz-Pacheco, Hill, Hirose, Hirschmann, Hoernle, Hofmann, Ibarrola, Irving, James D. L. White, Kaj A. Hoernle, Klitgord, Klügel, Klügel, Klügel, Kogiso, Le Maitre, Lister, Martel San Gil, Middlemost, Navarro, Olafsson, Pietruszka, Putirka, Putirka, Ranero, Roeder, Roeser, Romero Ortiz, Rubin, Rutherford, Ryan, Schmincke, Schmincke, Schmincke, Shaw, Skulski, Sparks, Staudigel, Takahashi, Tilling, Walker, Weaver, White, Wright, Wright   +74 more
core   +1 more source

Thermobarometry of CO2-rich, silica-undersaturated melts constrains cratonic lithosphere thinning through time in areas of kimberlitic magmatism

, 2020
Cratonic lithosphere is believed to have been chemically buoyant and mechanically resistant to destruction over billions of years. Yet the absence of cratonic roots at some Archean terrains casts doubt on the craton stability and longevity on a global ...
Chenguang Sun, R. Dasgupta
semanticscholar   +1 more source

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

Composition of the Sub‐Cratonic Mantle of the Guiana Shield Inferred From Diamond‐Hosted Inclusions

Geochemistry, Geophysics, Geosystems, 2021
The composition of diamond‐hosted inclusions provides insight into the character of the sub‐cratonic lithosphere of the Guiana Shield. Guyana's Paleoproterozoic diamonds preserve an inclusion suite comprised of forsterite (Fo ∼89.3–91.8), enstatite ...
R. Bassoo, K. S. Befus
doaj   +1 more source

Upper mantle magma storage and transport under a Canarian shield-volcano, Teno, Tenerife (Spain) [PDF]

, 2008
We use clinopyroxene-liquid thermobarometry, aided by petrography and mineral major element chemistry, to reconstruct the magma plumbing system of the late Miocene, largely mafic Teno shield-volcano on the island of Tenerife.
Ablay, Abratis, Amelung, Andronico, Banda, Beattie, Blundy, Bodine, Canales, Caress, Carracedo, Carracedo, Charvis, Clague, Clague, Collier, Dañobeitia, Dañobeitia, Dixon, Droop, Duke, Dvorak, Filmer, Freer, Frey, Ghiorso, Gudmundsson, Guillou, Gurenko, Gurenko, Hansteen, Hoernle, Humphreys, Instituto Geográfico Nacional, Ministerio de Fomento, Servicio de Información Sísmica, Klügel, Klügel, Klügel, Kress, Leonhardt, Lindsley, Lipman, Lofgren, Maclennan, Marc-Antoine Longpré, Marsh, Martí, McGuire, McKenzie, McKenzie, Mordick, Naumann, Neumann, Neumann, O'Hara, Olafsson, Pallister, Peltier, Perugini, Putirka, Putirka, Putirka, Putirka, Ranero, Roeder, Rutherford, Sachs, Schwarz, Soesoo, Sparks, Takada, ten Brink, Thirlwall, Thompson, Thor H. Hansteen, Tilling, Troll, Valentin R. Troll, Walter, Wass, Watts, Watts, Watts, Watts, Weertman, Wilshire, Wyllie, Ye   +86 more
core   +1 more source

Establishing a protocol for the selection of zircon inclusions in garnet for Raman thermobarometry

American Mineralogist, 2020
The structural and chemical properties of zircon inclusions in garnet megablasts from the Dora Maira Massif (Western Alps, Italy) were characterized in detail using charge contrast imaging, Raman spectroscopy, and laser ablation inductively coupled ...
N. Campomenosi, D. Rubatto, J. Hermann, B. Mihailova, M. Scambelluri, M. Alvaro   +5 more
semanticscholar   +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