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Stratiform U-Cu mineralization in the Lopejské Čelno valley near Podbrezová (Veporic Unit, Western Carpathians)
Title Stratiform U-Cu mineralization in the Lopejské Čelno valley near Podbrezová (Veporic Unit, Western Carpathians) Par.title Stratiformná U-Cu mineralizácia v Lopejskom Čelne pri Podbrezovej (veporikum, Západné Karpaty) Author info Richard Kopáčik ... [et al.] Author Kopáčik Richard 1995- (30%) UMBFP01 - Katedra geografie a geológie
Co-authors Ferenc Štefan 1977- (25%) UMBFP01 - Katedra geografie a geológie
Mikuš Tomáš (15%)
Budzák Šimon 1982- (10%) UMBFP08 - Katedra chémie
Butek Juraj 1993- (10%) UMBFP01 - Katedra geografie a geológie
Hoppanová Eva 1995- (10%) UMBFP01 - Katedra geografie a geológie
Source document Mineralia Slovaca. Roč. 55, č. 1 (2023), s. 53-70. - Bratislava : Štátny geologický ústav Dionýza Štúra, 2023 Keywords Cu mineralizácia oxidy veporikum - veporicum Headings Geogr. Západné Karpaty (pohorie) Form. Descr. články - journal articles Language English Country Slovak Republic Annotation The studied mineralization is located on the eastern slopes of Lopejské Čelno valley, south of the Lopej village (cadastral area of Podbrezová village, Central Slovakia). The U occurrence was described and classified as U-Cu stratiform mineralization. The mineralization is located in the Ľubietová Zone of Veporic Unit, and is bound to the arkosic sandstones containing Permian volcanoclastic material. The host rock of mineralization underwent low-grade metamorphism and limonitization. Lens shaped ore bodies are characterized by disseminated pyrite, rutile, chalcopyrite, leucoxene and metatorbernite. Small cavities and cracks in rock are also filled and/or coated by goethite, Mn oxides and malachite. Uranium is irregularly distributed within the host rock and is bound to the U-Ti oxides, brannerite and torbernite/metatorbernite. Brannerite and leucoxenized U-Ti oxides are the only one primary uranium U4+ minerals, for the first time identified in studied occurrence. Brannerite forms clusters of needle-like crystals (up to 100 μm in size). It occurs in close spatial and genetic association with U-Ti oxides, rutile, leucoxene and clay minerals. Chemical composition of brannerite and U-Ti oxides differs in ratio of U/(U + Ti): from 0.22 to 0.29 apfu for brannerite and from 0.09 to 0.22 apfu for U-Ti oxides. Metatorbernite forms light green crystals, typically occurs in small cavities and fractures in rock. It shows an unusual light green luminescence under UV radiation. The average chemical composition of metatorbernite can be expressed by empiric formula (Cu0.75Ba0.06Ca0.03K0.04Al0.02Mg0.01Fe0.01)Σ0.94 (UO2)Σ2.00 (PO4)Σ2.01 (H2O)8. Occasionally torbernite/metatorbernite directly replaces single crystals of apatite. URL Link na plný text Public work category ADN No. of Archival Copy 53479 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika 
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