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Rare-earth, yttrium and zirconium mobility associated with the uranium mineralisation at Okrouhla Radoun, Bohemian Massif, Czech Republic

Milos Rene
Rare-earth, yttrium and zirconium mobility associated with the uranium mineralisation at Okrouhla Radoun, Bohemian Massif, Czech Republic
European Journal of Mineralogy (February 2015) 27 (1): 57-70

Abstract

The mobility of rare-earth elements (REE), Y and Zr during the late Variscan and post-Variscan mineralization event in the Okrouhla Radoun uranium deposit has been investigated to elucidate their behavior during the hydrothermal alteration of leucogranites and high-grade metamorphic rocks in the Moldanubian Zone (Bohemian Massif). The alteration of leucogranites has caused enrichment in Na, Ca, Fe (super 3+) , Zr and the bulk of REE while depleting K, Fe (super 2+) , Si, Th, Rb and Ba. The alteration of high-grade metasediments has also led to an enrichment in Na and Ca while depleting K, Si, Rb and Ba. However, this change is connected to the depletion of REE, as well as the enrichment of P and Th in the bulk. The high mobility of Y and Zr during formation of the uranium mineralisation is supported by the occurrence of Y- and Zr-rich coffinite (up to 3.4 wt.% Y (sub 2) O (sub 3) and 13.8 wt.% ZrO (sub 2) ). The massive hydrothermal alteration of host rocks, as well as the high mobility of REE, Y and Zr indicate an influx of oxidized basinal fluids in the Permian to the crystalline rocks of the Moldanubian Zone.


ISSN: 0935-1221
EISSN: 1617-4011
Serial Title: European Journal of Mineralogy
Serial Volume: 27
Serial Issue: 1
Title: Rare-earth, yttrium and zirconium mobility associated with the uranium mineralisation at Okrouhla Radoun, Bohemian Massif, Czech Republic
Author(s): Rene, Milos
Affiliation: Academy of Sciences of the Czech Republic, Institute of Rock Structure and Mechanics, Prague, Czech Republic
Pages: 57-70
Published: 201502
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Germany
References: 48
Accession Number: 2015-067755
Categories: Geochemistry of rocks, soils, and sedimentsEconomic geology, geology of ore deposits
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 2 tables, geol. sketch maps
N49°15'00" - N49°15'00", E15°01'60" - E15°01'60"
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Abstract, copyright, Schweizerbart'sche Verlagsbuchhandlung. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 201529
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