Results 21 to 30 of about 516 (186)
The age and origin of the Vaasa migmatite complex revisited [PDF]
Bulletin of the Geological Society of Finland, 2014 The origin of the Vaasa migmatite complex was studied by using whole-rock Sm-Nd and zircon Lu-Hf and U-Pb data in conjunction with whole-rock major and trace element geochemistry.
E. Suikkanen +3 more
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Transactions of the Karelian Research Centre of the Russian Academy of Sciences, 2018 Inherited zircons in leucosomes from the Salma and Gridino study areas have been studied. The leucosomes were formed in Palaeoproterozoic shear zones crossw-cutting Archaean tonalite-trondhjemite-granodiorite (grey) gneisses that host amphibolites with ...
Татьяна Владимировна Картушинская +9 more
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Geosciences, 2020 Zircon grains from various metagranitoids (plagio- and monzo-granites, gneisses, metasomatic rocks, and pegmatoid veins) from the Skal’noe and Dikoe sites of the Litsa uranium ore area (Kola Region, Russia) were studied in order to reconstruct the ...
Tatiana Kaulina +5 more
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Cadomian metabasites of the Eastern Pyrenees revisited
Geologica Acta, 2022 This study presents a new geochemical, petrological, and geochronological U–Pb dataset from Ediacaran metabasites of the Canigó and Cap de Creus massifs, Eastern Pyrenees.
Núria Pujol-Solà +7 more
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U-Th-Pb zircon geochronology on igneous rocks in the Toija and Salittu Formations, Orijärvi area, southwestern Finland: Constraints on the age of volcanism and metamorphism [PDF]
Bulletin of the Geological Society of Finland, 2008 Zircons from a felsic volcanic rock in the Toija Formation and a synvolcanic gabbro intrusion in the Salittu Formation within the Orijärvi area were dated by U-Th-Pb SIMS in order to provide depositional constraints on these formations.
M. Väisänen, C.L. Kirkland
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Frontiers in Earth Science, 2022 In order to understand the subduction of the Yangtze block and its collision with the North China Craton, we performed the elements analysis and zircon U-Pb dating on paragneiss from Xinxian area, which located along the west edge of the Dabie-Sulu ...
Zhu Shaogong +4 more
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Journal of Asian Earth Sciences: X, 2022 The Kontum Massif, located in central Vietnam, played an essential role in the evolution of Indochina and its adjacent areas. The Van Canh granites, exposed throughout the Southern Kontum Massif, display SiO2 contents ranging from 65.82 to 75.35 wt%, and
Doan Dinh Hung +9 more
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Assessing Inheritance of Zircon and Monazite in Granitic Rocks from the Monashee Complex, Canadian Cordillera [PDF]
Journal of Petrology, 2008 Zircon and monazite from granitic sheets and dikes in the Monashee complex, Canadian Cordillera, were investigated to determine whether igneous crystallization occurred at 1 9G a or 50 Ma with 1 9 Ga inherited zircon and monazite. Four of the five samples are weakly deformed to undeformed, despite occurring in a gneiss dome at the structurally ...
Crowley, James +3 more
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地质科技通报, 2023 The Zhongba block, an important tectonic unit of the western segment of the Indus-Tsangpo suture zone (ITSZ) in southern Tibet, is significant for determining tectonic affinity and paleogeographic reconstruction along the northern margin of the Gondwana.
Shengwei Li +3 more
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Zircon dating of the basalt and felsic dyke in Haveri, SW Finland [PDF]
Bulletin of the Geological Society of Finland, 2022 The E-MORB type Haveri basalt differs from the volcanic arc type rocks in the Tampere belt showing no subduction signature. It is considered to have formed in a marginal basin prior to the volcanic arc. We present here zircon U-Pb dating on two samples.
Jaakko Kara +2 more
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