Results 81 to 90 of about 798 (184)

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

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

Lithological structure of western Pacific lithosphere reconstructed from mantle xenoliths in a petit-spot volcano

Progress in Earth and Planetary Science, 2022
The lithospheric mantle, formed at the mid-ocean ridge as a residue of crustal production, comprises theoretically depleted peridotite, but more fertile components (e.g., lherzolite and pyroxenite) have been reported, creating an enigmatic picture of the
Kazuto Mikuni, Naoto Hirano, Norikatsu Akizawa, Junji Yamamoto, Shiki Machida, Akihiro Tamura, Yuuki Hagiwara, Tomoaki Morishita   +7 more
doaj   +1 more source

Additional file 4 of Lithological structure of western Pacific lithosphere reconstructed from mantle xenoliths in a petit-spot volcano

, 2022
Additional file 4. Supplementary tables. Table S1. Major element compositions of olivine. Table S2. Major element compositions of clinopyroxene. Table S3. Major element compositions of orthopyroxene. Table S4. Major element compositions of spinel.
Naoto Hirano (188272), Junji Yamamoto (791222), Norikatsu Akizawa (14110561), Akihiro Tamura (611783), Yuuki Hagiwara (7020635), Tomoaki Morishita (8755557), Kazuto Mikuni (14110558), Shiki Machida (4473730)   +7 more
core   +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

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

Zircon Solubility, Metamict ZrSiO4 Replacement, and Hydrothermal Zircon Formation at Upper Crustal Pressures

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 3, March 2025.
Abstract Stable and inert under most conditions, zircon can be dissolved and precipitated by aqueous fluids in the upper crust. Geochemical models using currently available thermodynamic properties for Zr aqueous species at 0.2 GPa predict that zircon solubility increases with temperature from 400 to 900°C in fluids saturated with quartz or baddeleyite.
John C. Ayers, Chen Zhu
wiley   +1 more source

A XENOLITH-BASED LITHOSPHERIC TRANSECT OF THE SLAVE CRATON, N.W.T., CANADA [PDF]

, 2012
During the last decade, the Canadian Slave craton has emerged as an important global diamond resource. Recent work on the sub-continental lithospheric mantle (SCLM) beneath this craton has yielded tantalising suggestions about its structure and ...
MATHER, KATHLEEN,ANN
core  

Assessing Thermal Gradients Across Archean Stratigraphy Using Raman Spectra of Carbonaceous Material Thermometry and Mineral Chemistry in the Western Dharwar Craton, India

Geological Journal, Volume 60, Issue 2, Page 560-581, February 2025.
This study identifies a two‐stage metamorphism in the Western Dharwar Craton using Raman spectra of carbonaceous material (RSCM) thermometry, and analysis of metamorphic mineral chemistry. These findings are linked with the micro to regional‐scale structural evolution of the region, providing insights into how low‐grade metamorphism contributes to ...
Lakshmanan Sreehari, Sasidharan Kiran, Tomokazu Hokada, Madhusoodhan Satish‐Kumar, Tsuyoshi Toyoshima, Krishnan Sajeev, Perumal Rajkumar, Justin K. Antony   +7 more
wiley   +1 more source