Results 31 to 40 of about 2,386 (223)

Stepwise magma migration and accumulation processes and their effect on extracted melt chemistry [PDF]

Estonian Journal of Earth Sciences, 2009
Numerical and analogue models suggest that melt production, its segregation from the solid matrix and subsequent transport and accumulation are highly dynamic and stepwise processes exhibiting scale invariant patterns in both time and length scales ...
Urtson, Kristjan, Soesoo, Alvar
doaj  

P–T Modelling Constrains the Depth of Emplacement of the Porto Azzurro Pluton and Implies Minor Exhumation Caused by the Zuccale Fault (Island of Elba, Italy)

Journal of Metamorphic Geology, EarlyView.
ABSTRACT Understanding the pressure of emplacement of granitic intrusions is crucial to understanding the exhumation history of plutons and constraining the tectonic setting of magma emplacement. However, P–T and geochronological constraints from exhumed plutons are often characterized by large uncertainties, especially in shallow crustal settings with
Samuele Papeschi, Marco Bonini, Matteo Lupi, Chiara Del Ventisette, Domenico Montanari   +4 more
wiley   +1 more source

Double Power-Law in Leucosome Width Distribution: Implications for Recognizing Melt Movement in Migmatites

Frontiers in Earth Science, 2020
Leucosome sizes in migmatites has been shown to follow power-law distribution, which is indicative of self-organized criticality governing accumulation and transport of partial melts in anatexis.
Anna Saukko, Christian Ahläng, Kaisa Nikkilä, Alvar Soesoo, Olav Eklund   +4 more
doaj   +1 more source

Fluid inclusions in migmatites from Hunsur, Karnataka [PDF]

, 1997
Fluid inclusion studies in migmatites around Hunsur document the presence of a) CO2-CH4, CO2 and CO2-H2O inclusions in paleosome, b) predominantly CO2 inclusions in leucosome and c) CO2 and low salinity aqueous inclusions in late pink granite ...
Venugopal, L., Srikantappa, C.
core  

Isotopic Disequilibrium Between Migmatites and Protolith: Insights from a Variscan Anatectic Complex (NW of Iberian Variscan Belt, Portugal)

Geosciences
Isotopic disequilibrium during the formation of high-temperature (HT) metamorphic complexes by anatexis during continental collision is a process that deserves intense discussion since it is fundamental to understand the evolution of continental crust ...
Joana Alexandra Ferreira, Helena C. B. Martins, Maria dos Anjos Ribeiro, José Francisco dos Santos   +3 more
doaj   +1 more source

Dimension Stone: Exploration and Exploitation in parts of Lokoja, North-Central Nigeria

Journal of Applied Sciences and Environmental Management, 2020
The study area Lokoja is the home to the confluence between Rivers Niger and Benue. Dimension stone is cut or quarried stone in accordance with specific dimensions, generally more abundant and are used in greater quantities than ore minerals in pavement
N. Egesi, J.I. Nwosu
doaj   +1 more source

Extreme extension across Seram and Ambon, eastern Indonesia: evidence for Banda slab rollback [PDF]

Solid Earth, 2013
The island of Seram, which lies in the northern part of the 180°-curved Banda Arc, has previously been interpreted as a fold-and-thrust belt formed during arc-continent collision, which incorporates ophiolites intruded by granites thought to have been ...
J. M. Pownall, R. Hall, I. M. Watkinson
doaj   +1 more source

LifeMet: Report on the 2024–2025 meteorite recovery expedition in Dronning Maud Land, Antarctica for the study of microbe–meteorite interactions

Meteoritics &Planetary Science, EarlyView.
Abstract Since the discovery of nine meteorites near the Yamato mountains in 1969, Antarctica has been recognized as a superb location for meteorite recovery. While Antarctic recovery expeditions prioritize meteorite preservation for mineralogical and planetary studies, meteorites are not typically collected for biological applications.
Rachael Lappan, Rachel S. Kirby, Andrew G. Tomkins   +2 more
wiley   +1 more source

Ductile Extrusion Triggered by Continental Collision in NE Brazil

Terra Nova, EarlyView.
ABSTRACT The Borborema Province in northeastern Brazil hosts one of the world's largest strike‐slip shear zone networks, active during the late Neoproterozoic assembly of West Gondwana. Whether these shear zones initiated during active continental collision or as a post‐orogenic response to far‐field stresses remains debated.
L. R. Tesser, C. E. Ganade, C. R. Cioffi, J. B. Forshaw, M. Hueck, E. Celis, M. A. S. Basei   +6 more
wiley   +1 more source

Deformation partitioning in the mid- to deep sheared crust of the Variscan Fautea-Favone metamorphic complex (southern Corsica, France)

Journal of Maps
The Variscan basement in Corsica (France) is exposed as scattered metamorphic complexes preserved in the late Permian batholith in the south-western sector of the island.
Francesca Amabile, Chiara Frassi, Michele Marroni, Gisella Rebay   +3 more
doaj   +1 more source