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Akademický článek

Notable changes in geochemical and mineralogical characteristics of different phases of episyenitization: insights on the radioactive and shielding of the late phase

Autor: Sherif A. Taalab, Hesham M. H. Zakaly, V. Ivanov, Albandari W. Alrowaily, Hamdy A. Awad, Neveen S. Abed, Shams A. M. Issa, Amira M. Eltohamy, Antoaneta Ene

Publikováno v: Frontiers in Earth Science, Vol 11 (2023)

Kab Amiri granites are submitted to post-magmatic hydrothermal solutions through fracture and faults, causing several alteration processes. The most common processes are episyenitization, saussuritization, hematitization, sericitization, kaolinizatio

Externí odkaz: https://doaj.org/article/9886de4108784f5bb6aa97d8790f5308

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Akademický článek

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Akademický článek

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Episyenites—Characteristics, Genetic Constraints, and Mineral Potential

Autor: Suikkanen, E., Rämö, Tapani

Episyenites are sub-solidus, quartz-depleted alkali-feldspar-rich rocks. They form veins and lenticular bodies in granitoid rocks and migmatites in a late- to post-orogenic or anorogenic setting. Leaching of quartz is usually a response to a flux of

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=od______1593::680dc59ef0fe8bf3e7fbf5f02a406a64
http://hdl.handle.net/10138/306792

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A hydrothermal karst-hosted U-P deposit related to Pangea break-up: Itataia deposit, Borborema Province, Northeastern Brazil - a review

Autor: César Ulisses Vieira Veríssimo, Roberto Ventura Santos, Maria Dulcinéa M. R. Bessa, José Adilson Dias Cavalcanti, Clóvis Vaz Parente

Publikováno v: Repositório Institucional da Universidade Federal do Ceará (UFC)
Universidade Federal do Ceará (UFC)
instacron:UFC
Journal of the Geological Survey of Brazil, Vol 1, Iss 1 (2018)

The Itataia U-P deposit holds the second largest uranium reserve in Brazil. All of the uranium is contained within the microcrystalline structure of fluorapatite, which is the ore mineral of the collophanite bodies. The main lithology that hosts the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6b75e96d09fb1fa1d457bd1083316cf7
http://www.repositorio.ufc.br/handle/riufc/64313

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Episyenites in meta-granitoids of the Tauern Window (Eastern Alps): unpredictable?

Autor: Giorgio Pennacchioni, Claudio Mazzoli, Patrizia Ferretti, Alberto Ceccato, Federico Zorzi, A. M. Fioretti

Publikováno v: Journal of geodynamics 101 (2016): 73–87. doi:10.1016/j.jog.2016.04.001
info:cnr-pdr/source/autori:Pennacchioni G.[1], Ceccato A.[1], Fioretti A.M.[2], Mazzoli C.[1], Zorzi F.[1], Ferretti P.[3]/titolo:Episyenites in meta-granitoids of the Tauern Window (Eastern Alps): unpredictable?/doi:10.1016%2Fj.jog.2016.04.001/rivista:Journal of geodynamics/anno:2016/pagina_da:73/pagina_a:87/intervallo_pagine:73–87/volume:101

The core of the Tauern tectonic window (Eastern Alps) consists of pre-Alpine granitoids (∼295 Ma) variably deformed during Alpine (∼30Ma) amphibolite-facies metamorphism. Episyenites occur as local alteration haloes (as wide as a few meters) surr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::6272d6c394d7503d874c4d4213abfe2b
http://hdl.handle.net/11585/757885

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