Results 81 to 90 of about 9,282 (261)

Reactive Melt Flow in the Continental Arc Root: Insights for the Transition From Gabbronorite to Garnet Granulite in the Central Qilian Belt, NE Tibet

Geochemistry, Geophysics, Geosystems, Volume 26, Issue 9, September 2025.
Abstract Understanding reactive melt flow is crucial for advancing our knowledge of crustal differentiation; however, the mechanisms governing melt migration remain debated, particularly in deep magmatic arc environments. A composite sample from the Central Qilian continental arc, NE Tibet, preserves the transition from hornblende gabbronorite to ...
Xiao‐Kui Sun, Chao Wang, Nathan R. Daczko, Xiao‐Ying Liao, Ji‐Heng Zhang, Wen‐Qiang Yang, Liang Liu   +6 more
wiley   +1 more source

Petrophysical characterization of the late-Variscan Santa Eulália Plutonic Complex (Ossa Morena Zone) [PDF]

, 2011
Petrophysical characterization of the late-Variscan Santa Eulália Plutonic Complex (Ossa Morena Zone) Sant’Ovaia, H.1, Nogueira, P.1,2, Carrilho Lopes, J.2,3, Fonseca, A.2, Sardinha, R.2, Lopes, L.2, Martins, H.1, Noronha, F.1 1: Universidade do Porto ...
Fonseca, André, Lopes, José Carrilho, Lopes, Luis, Martins, Helena, Nogueira, Pedro, Noronha, Fernando, Sant'Ovaia, Helena, Sardinha, Rui   +7 more
core  

Coupling Phase Equilibrium Modelling and Apatite‐in‐Garnet Elastic Barometry to Unravel the P–T Path of the Micaschist Unit From the Zicavo Metamorphic Complex (Corsica, France)

Journal of Metamorphic Geology, Volume 43, Issue 7, Page 681-705, September 2025.
ABSTRACT To gain insights into the pressure–temperature evolution of a scarcely studied portion of the Variscan basement of Corsica in southern Europe, we combined phase equilibrium modelling, Zr‐in‐rutile thermometry and apatite‐in‐garnet elastic barometry. We investigated Grt‐St micaschist rocks containing garnet grains of several millimetres in size
Lorenzo Dulcetta, Xin Zhong, Gabriele Cruciani, Johannes Vrijmoed, Jan Pleuger, Marcello Franceschelli, Timm John   +6 more
wiley   +1 more source

Exploring the relationships between shear zones and granites: field and microstructural data for contrasting case studies of the Borborema Province (NE Brazil)

Geologia USP. Série Científica, 2021
We explore meso- and microstructural features of granites closely related to strike-slip shear zones in the Borborema Province, NE Brazil. The Riacho do Icó Stock is an en-cornue intrusion aged at ca. 607 Ma.
Lauro Cézar Montefalco de Lira Santos
doaj  

Modelling mid-crustal migmatite terrains as feeder zones for granite plutons: the competing dynamics of melt transfer by bulk versus porous flow [PDF]

, 2017
The common association of mid-crustal migmatites with an upper-level granite pluton could indicate that the migmatites are a feeder zone for the pluton. If magma from a deeper level pervasively intrudes a high temperature metamorphic complex, most of the
Baumgartner, Lukas P., Marsh, Bruce D., Olsen, Sakiko N.   +2 more
core  

Zircon (Re)crystallization During Metamorphism: Zircon Paragenesis in the Papua New Guinea Coesite Eclogite Revisited

Journal of Metamorphic Geology, Volume 43, Issue 7, Page 663-680, September 2025.
ABSTRACT The youngest known ultrahigh‐pressure (UHP) eclogite from Tumagabuna Island, a small island of the D'Entrecasteaux Islands chain in Papua New Guinea, exhibits zircon U–Pb age variations spanning a few million years. This age variation complicates the interpretation of the evolution of this high and ultrahigh‐pressure ([U]HP) terrane.
Linus B. Streicher, Fraukje M. Brouwer, Keewook Yi, Suzanne L. Baldwin, Wim van Westrenen   +4 more
wiley   +1 more source

U-Pb SHRIMP dating of the Itabaiana Dome: a Mesoarchean basement inlier (2.83 Ga) in the Sergipano Orogenic System, Borborema Province

Brazilian Journal of Geology, 2020
In the southern portion of the Borborema Province, in the Sergipano Orogenic System, three basement inliers have been described: the Domes of Itabaiana and Simão Dias, in Sergipe; and the Girau do Ponciano Dome, in Alagoas.
Maria de Lourdes da Silva Rosa, Joane Almeida da Conceição, Moacyr Moura Marinho, Fábio dos Santos Pereira, Herbet Conceição   +4 more
doaj   +1 more source

LANDSAT and radar mapping of intrusive rocks in SE-Brazil [PDF]

The feasibility of intrusive rock mapping was investigated and criteria for regional geological mapping established at the scale of 1:500,00 in polycyclic and polymetamorphic areas using the logic method of photointerpretation of LANDSAT imagery and ...
Barbosa, M. P., Dosanjos, C. E., Dossantos, A. R., Moreira, J. C., Parada, N. D. J., Veneziani, P.   +5 more
core   +1 more source

Log‐Periodic Power Law Singularities in Landslide Dynamics: Statistical Evidence From 52 Crises

Geophysical Research Letters, Volume 52, Issue 15, 16 August 2025.
Abstract Landslide movements typically show a series of progressively shorter quiescent phases, punctuated by sudden bursts during an acceleration crisis. We propose that such intermittent rupture phenomena can be described by a log‐periodic power law singularity model. Amounting mathematically to a generalization of the power law exponent from real to
Qinghua Lei, Didier Sornette
wiley   +1 more source

Plutonic associations of North-East, Bahia [PDF]

, 1987
Dans le but d'illustrer une excursion géologique, les auteurs décrivent les associations plutoniques du nord-est de l'Etat de Bahia. Ils abordent le cadre géologique régional et ils présentent les caractéristiques pétrologiques et structurales à l ...
Giuliani, Gaston, Mac Reath, Ian, Sabaté, Pierre   +2 more
core