Results 81 to 90 of about 2,556 (192)
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 +5 more
doaj +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 +4 more
core +1 more source
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
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 +7 more
wiley +1 more source
Terra Nova, Volume 37, Issue 1, Page 41-48, February 2025.ABSTRACT This study provides new mineral chemistry data together with micro‐thermometric measurements on fluid inclusions hosted in ultramafic xenoliths (lherzolite, wehrlite, and dunite) brought to the surface by the last Mt. Vulture volcano activity (140 ka; southern Italy), and fed by melilitite‐carbonatite magmas.
Gabriele Carnevale +9 more
wiley +1 more source
A Clockwise P-T Path from the Variscan Basement of the Tisza Unit, Pannonian Basin, Hungary
Geologia Croatica, 2010 The polymetamorphic basement of the Tisza Unit forms a detachedfragment of the Variscan European foreland of the Neotethyanrealm. A clockwise evolution path of a gneiss-amphibolite complexof the Tisza Unit was reconstructed, investigating the ...
Peter Arkai, Peter Horvath, Geza Nagy
doaj +1 more source
Geophysical Research Letters, Volume 52, Issue 2, 28 January 2025.Abstract The temperature of the convecting mantle and thickness of the lithosphere control many of Earth's processes. However, there is disagreement regarding the evolution of these quantities through time. We use a global data set of mantle xenoliths and xenocrysts to construct paleogeotherms at different eruption ages (16–1,311 Ma) and estimate the ...
Z. J. Sudholz, A. Copley
wiley +1 more source
Island Arc, Volume 34, Issue 1, January/December 2025.ABSTRACT Intermittent volcanic activity has continued at Nishinoshima volcano in the Izu–Bonin arc in the western Pacific since 2013, characterized mostly by effusive Strombolian eruptions (Episodes 1–3). Subsequently, the eruption style changed suddenly to explosive violent Strombolian in mid‐June 2020 (Episode 4), after which the volcano entered a ...
Kenta K. Yoshida +8 more
wiley +1 more source
Island Arc, Volume 34, Issue 1, January/December 2025.ABSTRACT The Ryoke metamorphic belt records the conditions of the middle–upper crust during Cretaceous crustal deformation and magmatism. To understand the development and evolution of the middle–upper crust, it is important to investigate the thermal structure of the Ryoke metamorphic belt.
Takuro Yoshioka +3 more
wiley +1 more source