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تعداد نتایج: 69  

Journal: :Journal of the Geological Society 2023

Scottish ‘Newer Granites’ record the evolution of Caledonides resulting from Iapetus subduction and slab breakoff during Silurian–Devonian Scandian Orogeny, but relationships between geodynamics, petrogenesis emplacement are incomplete. Laser ablation U–Pb results magmatic zircons at Cluanie Pluton (Northern Highlands) identify clusters concordant Silurian data points. A cluster with a weighted...

Journal: :Lithos 2022

The genesis of Eocene to Early Oligocene plutons and dykes emplaced in the suture zone between two colliding continental blocks southeastern Iran has been subject debate concerning processes that formed magmas influenced their intrusive history. We report geological, geochemical, mineralogical isotope evidence constrains origin Lakhshak plutonic complex. SiO2 contents granodioritic pluton dacit...

Journal: :Lithosphere 2021

Abstract The eastern Tibetan Plateau is a key part of the India–Asia collisional zone, region that records multiple overprinting tectonic and magmatic events. This study presents new geochronological, geochemical, Sr–Nd–Hf–O isotopic data for Cenozoic potassic granitoids in Tibet, southwestern China, which recorded evolution Plateau. These are formed between 37.6 32.9 Ma geochemically subdivide...

ژورنال: کواترنری ایران 2019
Khajei, Ali Mohammad , Mahmoudi , Shahriar ,

Sciences, Kharazmi University Introduction Petrogenesis of continental magmatic arc is more complicated than oceanic arcs. Because some various parameters affect the composition of magmatism in the congenital margin, such as continental crust contamination, mixing with crustal magmas and the deformation phenomena from primary mantle magma (Martin et al., 2005; Eyuboglu et al., 2018; Pawley and...

Journal: :Minerals 2022

The evolution of the eastern Paleo-Asian Ocean (PAO) has controlled formation southeastern Central Asian Orogenic Belt (CAOB). However, history and final closure time PAO still remain controversial, which greatly restricts understanding process CAOB. To address these issues, we provide detailed zircon chronology Hf isotope geochemical data Paleozoic to Triassic magmatic rocks in We have identif...

Journal: :Geological Society of America Bulletin 2022

The East Kunlun Orogen (EKO) in the northern Tibetan Plateau records two continental collisional orogenic events and magmatism early Paleozoic Mesozoic. However, possible magmatic additions to crust growth of EKO different tectonic stages orogeny have been overlooked. Three phases plutons from Xiangride-Kuhai area east chosen for detailed investigation results are reported here. oldest suite (S...

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