Results 31 to 40 of about 1,193 (219)

An Investigation on the Composition of Biotite from Mashhad Granitoids, NE Iran [PDF]

Journal of Sciences, Islamic Republic of Iran, 2010
Compositions of biotite from three different rock types of Mashhad granitoids, i.e., granodiorite, monzogranite and leucogranite in NE of Iran have been documented by electron microprobe and wet chemistry for Fe3+ and Fe2+.
A.A.T. Shabani
doaj  

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

Illite K-Ar and (U-Th)/He low-temperature thermochronology reveal onset timing of Yadong-Gulu rift in southern Tibetan Plateau

Frontiers in Earth Science, 2022
Determining the timing of E-W extension across the NS-trending rifts in southern Tibet is key to test the mechanical models of the latest evolution in the collision between India and Asia.
Shiguang Wang, Shiguang Wang, Xiaoming Shen, Marie-Luce Chevalier, Marie-Luce Chevalier, Marie-Luce Chevalier, Anne Replumaz, Yong Zheng, Yong Zheng, Yong Zheng, Haibing Li, Haibing Li, Haibing Li, Jiawei Pan, Jiawei Pan, Jiawei Pan, Kang Li, Xiwei Xu   +17 more
doaj   +1 more source

Thermal Structure Beneath the Himalayan Orogen Revealed by Pn‐Wave Receiver Function Imaging

Geophysical Research Letters, Volume 53, Issue 12, 28 June 2026.
Abstract The Himalayan orogen formed through convergence between the Indian and Eurasian plates, and parts of the subducting Indian crust were impeded by the Lhasa terrane and accreted into the orogen. However, whether the Indian lower crust was stripped from the downgoing plate and incorporated into the orogen, and by what mechanism, remain debated ...
Liangyu Zhang, Xiaobo Tian, Jia‐Min Wang, Xiaofeng Liang   +3 more
wiley   +1 more source

Age of crustal melting, emplacement and exhumation history of the Shivling leucogranite, Garhwal Himalaya

, 1999
We report a U-Pb monazite age of 23.0 ± 0.2 Ma for the Shivling leucogranite, a tourmaline + muscovite ± biotite leucogranite at the top of the High Himalayan slab in the Garhwal Himalaya, north India.
Noble, SR, Searle, Michael, Searle, MP, Hurford, AJ, Rex, DC   +4 more
core   +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 syn-collisional Danaciobasi biotite leucogranite derived from the crustal thickening in central Anatolia (Kirikkale), Turkey

, 2005
The Behrekdag composite batholith, which crops out as a huge N-S-trending plutonic body in central Anatolia, Turkey, consists of five mappable granitoid units of Late Cretaceous age. They are (1) the S-type, peraluminous Danaciobasi biotite leucogranite,
Boztug, D, Tatar, S
core   +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

Geochronology and geochemistry of the Paleogene Magdalena Suite of anatectic granites in northern Sonora, México

Revista Mexicana de Ciencias Geológicas
New zircon U-Pb geochronology, zircon geochemistry, and whole rock geochemistry are presented from the Magdalena granites in northern Sonora, Mexico that outcrop in the footwall of the Magdalena-Madera metamorphic core complex.
James B. Chapman, Carlos M. González-León, Luigi A. Solari, Elizard González-Becuar, Jonathan A. Nourse, Michelle Vázquez, Teresita Sánchez Navarro, Rufino Lozano Santacruz, Ofelia Pérez Arvizu, Estefany Grijalva Espinoza   +9 more
doaj   +1 more source