Results 91 to 100 of about 3,793 (208)

Structure of the NE Oman Mountains: A Review of Robust Geochronological Constraints for Tectonic Models of Ophiolite Obduction and Continental Subduction

open access: yesTectonics, Volume 44, Issue 8, August 2025.
Abstract The Late Cretaceous Semail ophiolite, Oman was emplaced onto the previously passive continental margin of Arabia. Recent geochronology from the ophiolite, its metamorphic sole, and associated high‐pressure (HP) metamorphic rocks have resulted in a proliferation of new tectonic models explaining the sequence of events associated with ophiolite ...
Michael P. Searle   +2 more
wiley   +1 more source

Structure of late Variscan Millevaches leucogranite massif in the French Massif Central: AMS and gravity modelling results [PDF]

open access: yes, 2006
In the Limousin area, Variscan leucogranitic plutons are spatially associated with normal faults and major strike-slip shear zones that are a continuation of the South Armorican shear zone. Our study focuses on the large N-S-trending Millevaches granitic
Arthaud   +46 more
core   +4 more sources

Significance of Leucogranitic Gneiss in the Archean Teton Range

open access: yesThe UW National Parks Service Research Station Annual Reports, 2008
In previous years of this project, we have developed the hypothesis that the high-pressure granulites exposed in the Moose Basin area of the Teton Range represent evidence of a 2.7 billion year­old continent-continent collision. We have described gneisses in the Teton Range that show two distinct metamorphic histories. In the northwest there are high­
B. Frost   +4 more
openaire   +2 more sources

Mineralization at Different Structural Levels in the Crust

open access: yesActa Geologica Sinica - English Edition, Volume 99, Issue 4, Page 1042-1058, August 2025.
Abstract Metallogenic research on structural levels can reveal vertical patterns of mineralization and facilitate the deep exploration of economic minerals. However, research focusing on the correlation between structural levels and mineralization remains limited.
Saisai LI, Hongrui ZHANG, Zengqian HOU
wiley   +1 more source

Géochronologie revisitée du dôme du Léon (Massif armoricain, France) [PDF]

open access: yes, 2009
National audienceDe nouvelles datations réalisées sur les principaux ensembles granitiques et métamorphiques du Léon permettent de préciser l'histoire de ce domaine de la chaîne hercynienne.
Cocherie, Alain   +4 more
core   +1 more source

Some progress on understanding the Phanerozoic granitoids in China

open access: yesChina Geology, 2018
: There are large volumes of the Phanerozoic granitoid rocks in China and neighboring areas. In recent years, numerous new and precise U-Pb zircon ages have been published for these granitoids, and define many important magmatic events, such as ca.
Tao Wang   +8 more
doaj   +1 more source

Metamorphism and plutonism in the Quetico Belt, Superior Province, N.W. Ontario [PDF]

open access: yes
The Quetico Belt lies between the metavolcanic Wawa-Shebandowan and Wabigoon Belts. It consists of marginal metasedimentary rocks and central pelitic, gneissic and plutonic rocks.
Percival, J. A.
core   +1 more source

Nonlinear phenomena in fluids with temperature-dependent viscosity: an hysteresis model for magma flow in conduits

open access: yes, 2002
Magma viscosity is strongly temperature-dependent. When hot magma flows in a conduit, heat is lost through the walls and the temperature decreases along the flow causing a viscosity increase. For particular values of the controlling parameters the steady-
Costa, Antonio, Macedonio, Giovanni
core   +1 more source

A multidisciplinary study of a syntectonic pluton close to a major lithospheric-scale fault: relationships between the Montmarault granitic massif and the Sillon Houiller Fault in the Variscan French Massif Central. Part I: Geochronology, mineral fabrics and tectonic implications [PDF]

open access: yes, 2007
International audienceDue to its location along one of the major faults, the Sillon Houiller Fault (SHF) of the French Massif Central (FMC), the Montmarault granitic pluton is well-suited to better understand the place of the late-orogenic magmatism in ...
Chen, Yan   +3 more
core   +3 more sources

Anomalously old biotite 40Ar/39Ar ages in the NW Himalaya [PDF]

open access: yes, 2017
Biotite 40Ar/39Ar ages older than corresponding muscovite 40Ar/39Ar ages, contrary to the diffusion properties of these minerals, are common in the Himalaya and other metamorphic regions.
Grujic, Djordje   +6 more
core   +1 more source

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