Results 81 to 90 of about 2,562 (192)

Efficacy of Assessing Magmatic Storage Depth Using Natural Samples, Experiments and Thermodynamic Models: A Case Study From Valles Caldera, NM (USA)

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 7, July 2025.
Abstract Estimates of magmatic storage are typically made using mineral assemblages in natural samples, experiments and thermodynamic models (e.g., MELTS), where each method has limitations. Here, we compare each of these methods to assess their utility in estimating storage conditions for post‐collapse, two‐feldspar high‐silica rhyolites (HSRs ...
Magdalen A. Grismer, Laura E. Waters, Gordon M. Moore, Gabriela A. Farfan   +3 more
wiley   +1 more source

Numerical Modeling Integrated With Field Observations and Analytical Data of the 2021 Cumbre Vieja Eruption Improves Understanding of Eruption Dynamics at Mafic Volcanoes

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 6, June 2025.
Abstract Abrupt transitions in eruptive style are common at mafic volcanoes, possibly leading to styles that potentially damage infrastructures and threaten the surrounding communities. During the 19th September–13th December 2021 Cumbre Vieja eruption (La Palma, Canary Islands), rapid changes in eruptive style were observed, from vigorous lava ...
Elisa Biagioli, Giuseppe La Spina, Margherita Polacci, Barbara Bonechi, Jorge E. Romero, Mike Burton   +5 more
wiley   +1 more source

Temperature and pressure in the environment of epithermal alteration: a case study at Ibaré Lineament, Rio Grande do Sul, Brazil

Brazilian Journal of Geology
: The Ibaré Lineament is a shear zone that sections the Western portion of Sul-riograndense Shield, affecting the orthogneissic rocks of Santa Maria Chico Granulitic Complex, acting as a conduct for hydrothermal fluids.
Kelvyn Mikael Vaccari Ruppel, Norberto Dani, Marcus Vinicius Dorneles Remus, Luiz Henrique Ronchi, Marcia Elisa Boscato Gomes, Eliel Senhorinho   +5 more
doaj   +1 more source

Magma‐Assisted Flexure of Hawaiian Lithosphere Inferred From Three‐Dimensional Models of Lithospheric Flexure Constrained by Active Source Seismic Data

Journal of Geophysical Research: Solid Earth, Volume 130, Issue 6, June 2025.
Abstract Reprocessed and newly acquired seismic data provide new constraints on lithospheric flexure profiles beneath the Hawaiian Islands. We use these new observations and three‐dimensional numerical models of lithospheric deformation combining elasticity, brittle failure, low‐temperature plasticity (LTP) and high‐temperature creep deformation ...
D. Douglas, G. Ito, B. Boston, R. Dunn, J. Naliboff, P. Wessel, A. B. Watts, D. Shillington, P. Cilli   +8 more
wiley   +1 more source

Rift‐Related Low‐Pressure–High‐Temperature Granulite Facies Metamorphism Generates Widespread Peraluminous Crustal Melts: Evidence From the Early Jurassic Mexican Crust

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 5, May 2025.
Abstract High heat fluxes occurring in rift settings are expected to generate partially melted low‐pressure–high‐temperature granulites (LP–HTG). Therefore, studying these rocks can offer valuable insights into crustal reworking during extension. However, our interpretations are limited by the rarity of LP–HTG in the metamorphic record.
Anthony Ramírez‐Salazar, Mattia Parolari, Arturo Gómez‐Tuena, Fernando Ortega‐Gutiérrez, Mariano Elías‐Herrera   +4 more
wiley   +1 more source

High pressure metamorphic conditions in garnet amphibolite from a collisional shear zone related to the Tapo ultramafic body, Eastern Cordillera of Central Peru [PDF]

, 2010
A discontinuos belt of elongated ultramafic rock bodies (mostly serpentinites) occurs in the Eastern Cordillera of the central Peruvian Andes. One of the main occurrences is the Tapo Massif, a lense-shaped serpentinite body, ~2 km x 5 km, comprising ...
Acosta, Jorge, Castroviejo Bolibar, Ricardo, Rivera Feijóo, Miguel, Rodrigues, Jose F., Willner, Arne P.   +4 more
core   +1 more source

Trace element thermometry of garnet-clinopyroxene pairs [PDF]

, 2016
We present major and trace element data on coexisting garnet and clinopyroxene from experiments carried out between 1.3 and 10 GPa and 970 and 1400 °C.
Blundy, Jon, Brooker, Richard, Pickles, Jonathan   +2 more
core   +2 more sources

The Anchimetamorphic Tectonic Mélange of Tempa Roccarossa (Southern Apennines, Italy): Insights on the Kinematic and Thermobaric Evolution of the Upper Miocene‐Pliocene Orogenic Wedge

Tectonics, Volume 44, Issue 5, May 2025.
Abstract Studies of tectonic mélanges provide constraints on the evolution of active plate margins. However, resolving the pressure‐temperature trajectories of these deformed rocks, which are exhumed from low‐temperature conditions, can be challenging.
S. Vitale, G. L. Cardello, F. Cavalcante, L. Fedele, P. Lanari, M. Mehmood, J. Natale, L. Peruzzo, S. Ciarcia   +8 more
wiley   +1 more source

Monazite Beats Zircon Regarding Dating of Young Metamorphic Events—An Example From Polycyclic Granitic Gneiss of the Pohorje Mountains, Slovenia

Terra Nova, Volume 37, Issue 2, Page 111-118, April 2025.
ABSTRACT The result of dating U–(Th)–Pb bearing minerals in metamorphic rocks frequently suffers from the interpretative relation of their growth to a specific metamorphic event. This problem occurs in the southern Pohorje Mountains. Therefore, granitic gneiss from this area was studied.
Botao Li, Hans‐Joachim Massonne, Junfeng Zhang, Xiaoping Yuan, Tao Luo   +4 more
wiley   +1 more source

Late Precambrian U-Pb titanite age for peak regional metamorphism and deformation (Knoydartian orogeny) in the western Moine, Scotland [PDF]

, 2003
There has been controversy over the number and timing of orogenies in the Precambrian Moine block in the Scottish Caledonides since the earliest radiometric dating in the 1960s. This work challenges a recent hypothesis, that this sector of the Laurentian
Evans, J.A., Tanner, P.W.G.
core   +1 more source