Leucosome
Mostrando 1-4 de 4 artigos, teses e dissertações.
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1. U-Pb SHRIMP dating of basement rocks of the Iriri-Xingu domain, Central Amazonian province, Amazonian craton, Brazil
Abstract The Iriri-Xingu domain, located in the central part of the Amazonian craton, consists of extensive occurrences of Paleoproterozoic volcanic rocks and granites with published ages of ca. 1990 to 1840 Ma, which show a strong crustal contribution for their magmas. Exposures of basement rocks are small and rare. Samples from two areas were dated in this
Braz. J. Geol.. Publicado em: 21/10/2019
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2. Evaluation of the contributions of possible sources to the leucosome of the diatexite of Socorro-Guaxupé Nappe, in the Alfenas Region, MG, Brazil
Abstract The Socorro-Guaxupé Nappe crops out in southern Minas Gerais and it has an intermediate unit called Metaxite Unit, dominated by diatexites at its base, with large volumes of leucosome and schollen of stromatic garnet-biotite metatexite. Leucosome within the schollen crystallized via fractional crystallization and is dominated by plagioclase and qua
Braz. J. Geol.. Publicado em: 08/04/2019
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3. Geology of the Camboriú Complex (SC) / Geologia do Complexo Camboriú (SC)
The anatectic origin evidenced by known macrostructures in migmatites of the Camboriú Complex is supported by petrographical, geochemical and isotopic data, with partial melting under compressional regimen being suggested by the large amount of leucosome bodies at low-pressure sites represented by interboudins and dilation surfaces. Despite the continental
Publicado em: 2008
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4. Granitic Magma generation and migration through continental crust: detailed studies in granites and migmatites from Nazaré Paulista region, SP (SE Brazil) / Geração e migração de magmas graníticos na crosta continental: estudos de detalhe em granitos e migmatitos da região de Nazaré Paulista (SP)
As condições de geração e migração de magmas na crosta continental foram investigadas a partir de estudos de detalhe em dois afloramentos de granitos anatéticos tipo Nazaré Paulista (Nappe Socorro Guaxupé, região de Atibaia, SP), utilizando como ferramentas principais a geoquímica de elementos maiores e traços em rochas e minerais e a isotopia Sr
Publicado em: 2006