Results 21 to 30 of about 199 (173)

The Encantada Granite: registration of a peraluminous intrusion in the Rondonian Province - San Ignacio, in SW Amazonic Craton, Mato Grosso, Brazil [PDF]

Geologia USP. Série Científica, 2015
The Encantada Granite occurs on the extreme southwest of the state of Mato Grosso, SW of the Amazonian Craton, near the border of Brasil/Bolívia. It corresponds to an body oriented to NNW direction that intruded metasedimentary and metavolcanic rocks ...
Brena Verginassi do Nascimento, Carlos Humberto da Silva, Ana Cláudia Dantas da Costa   +2 more
doaj   +1 more source

Insights from the Alabama Hills into Mesozoic Magmatism and Tectonics in Eastern California

Lithosphere, 2022
New zircon U-Pb ages for the Alabama Hills Granite in Owens Valley, eastern California, range from 103 to 102 Ma, nearly 20 Ma older than previously published zircon ages.
Ryan E. Frazer, Sean P. Gaynor, Drew S. Coleman, Jennifer M. Wenner   +3 more
doaj   +1 more source

U-Pb AGE AND GEOCHEMICAL TYPIFICATION OF THE SARAM MASSIF ROCKS (WESTERN TRANSBAIKALIA): EARLY JURASSIC GRANITOID MAGMATISM

Геодинамика и тектонофизика
The paper presents data on the geological position, age and features of the material composition of the Saram massif granitoids, located in the northwestern part of the Malkhan ridge of Western Transbaikalia.
A. L. Elbaev, I. V. Gordienko, V. B. Khubanov, N. S. Karmanov, B. Zh. Zhalsaraev   +4 more
doaj   +1 more source

Mise en solution et précipitation de l'uranium et du thorium dans les conditions de moyenne et haute température (résumé) Solution and Precipitation of Uranium and Thorium under Average and High-Temperature (Summary)

Oil & Gas Science and Technology, 2006
Les études tant analytiques qu'expérimentales réalisées au cours des vingt dernières années ont bien montré le rôle joué par les complexes d'uranylcarbonates dans le transport de l'uranium en milieu hydrothermal oxydant ou faiblement réducteur.
Moreau M., Poty P.
doaj   +1 more source

Orogeny, migmatites and leucogranites: A review

Journal of Earth System Science, 2001
The type ofP-T-t path and availability of fluid (H2O-rich metamorphic volatile phase or melt) are important variables in metamorphism. Collisional orogens are characterized by clockwiseP-T evolution, which means that in the core, where temperatures exceed the wet solidus for common crustal rocks, melt may be present throughout a significant portion of ...
openaire   +2 more sources

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

Late Jurassic Leucogranites of Macau (SE China): A Record of Crustal Recycling During the Early Yanshanian Orogeny

Frontiers in Earth Science, 2020
The Yanshanian Orogeny consists of Jurassic to Cretaceous compressional-extensional cycles related to the subduction of the Paleo-Pacific Ocean beneath East Asia. Numerous granitic plutons were emplaced across southeast China at distinct intervals over a
J. Gregory Shellnutt, Matthew W. Vaughan, Hao-Yang Lee, Yoshiyuki Iizuka   +3 more
doaj   +1 more source

The Roles of Climate and Tectonics in the Tectonomorphic Evolution of the Sagarmatha (Mt. Everest) Region, Eastern Nepal Himalaya

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 5, May 2026.
Abstract To understand the interplay of climate and tectonics in driving long‐term erosion and landscape evolution in the Himalayan orogen, this study examines the tectono‐thermal evolution of the Sagarmatha (Mt. Everest)‐Rolwaling‐Okhaldhunga region in eastern Nepal.
Tshering Z. L. Sherpa, Peter G. DeCelles, Barbara Carrapa   +2 more
wiley   +1 more source

The 3.5 Ga Siurua trondhjemite gneiss in the Archaean Pudasjärvi Granulite Belt, northern Finland [PDF]

Bulletin of the Geological Society of Finland, 2003
In the Archaean Pudasjärvi Complex the pyroxene-bearing rocks are considered to form a belt, the Pudasjärvi Granulite Belt (PGB). The major rock types of the PGB are meta-igneous mafic and felsic granulites, and trondhjemite gneisses Red alaskites, white
T. Mutanen, H. Huhma
doaj   +1 more source

Multi‐Method Geophysical Surveys Between and Around the Kerlescan and the Manio Megalithic Alignments in Carnac (Morbihan, France)

Archaeological Prospection, Volume 33, Issue 2, Page 499-517, April/June 2026.
ABSTRACT The Carnac alignments in Morbihan (France) are among the most famous Neolithic sites of the world. Paradoxically, they have benefited little from a thorough renewal of archaeological data over the past century. There are many reasons for this, but it is mainly because the site has been regarded more as a monument to visit and protect than as ...
Guillaume Bruniaux, Vivien Mathé, Olivier Agogué, Sylvia Lopez, Philippe Paillou, Reena Perschke, Vincent Ard   +6 more
wiley   +1 more source