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Title Cu-(U) mineralisation in the copper sandstones at Šafárka occurrence near Novoveská Huta (Spišská Nová Ves), Spišsko-gemerské Rudohorie Mts., Western Carpathians, Gemeric Unit, eastern Slovakia Author info Štefan Ferenc ... [et al.] Author Ferenc Štefan 1977- (40%) UMBFP01 - Katedra geografie a geológie
Co-authors Mikuš Tomáš (20%)
Kopáčik Richard 1995- (18%) UMBFP01 - Katedra geografie a geológie
Vlasáč Jozef (17%)
Hoppanová Eva 1995- (5%) UMBFP01 - Katedra geografie a geológie
Source document Acta Geologica Slovaca. Roč. 14, č. 2 (2022), s. 87-101. - Bratislava : Univerzita Komenského, 2022 Keywords pieskovce uránovo-medená mineralizácia Headings Geogr. Západné Karpaty (pohorie) Form. Descr. články - journal articles Language English Country Slovak Republic Annotation Several occurrences of copper sandstone mineralisation type occur in the Permian volcano-sedimentary sequences of the Northern Gemeric Unit (Spišsko-gemerské Rudohorie Mts.). The object of presented mineralogical research was Cu-(U) mineralisation in the copper sandstones at the Šafárka occurrence, located about 4 km SE of Novoveská Huta (part of Spišská Nová Ves district town). Cu-(U) mineralisation occurs in fine-grained psammites of greenish-grey colour. The surface of the samples is limonitized, with coatings of green Cu and U supergene minerals. The main rock-forming mineral is quartz. Carbonate (probably authigenic), muscovite and fragments of sericite shales or highly altered volcanics are present to a lesser extent. Accessories represent K-feldspar, tourmaline and leucoxenized Fe-Ti oxides. Rock matrix is formed mainly by sericite, and fine-grained quartz. Ore minerals (chalcopyrite, pyrite - also var. bravoite, tennantite-(Fe), uranium-bearing leucoxene) form disseminations and veinlets in sandstones. Supergene minerals of Fe, Cu and U (chalcocite, yarrowite, uranophane-α, goethite, malachite, baryte, anglesite and cinnabar) fill microscopic cavities and cracks in the rock. Based on the chemical composition, the studied pyrite can be divided into several groups: a) pyrite with a minimum content of admixtures (composition almost corresponding to the formula FeS2; b) As-bearing pyrite; and c) Ni- and Co-bearing bravoite. Arsenic most likely enters the anionic position of pyrite by the substitution As1-→S1-, and is probably present in solid solution. Zonality of bravoites is caused by ranging in Ni content and the corresponding fluctuations in Fe content (negative correlation), at a relatively constant Co content. Studied bravoites represent a nice example of the preferred concentration of Ni at the edges of the crystals and growth zones. Formation of uranophane-α documents the neutralisation of the environment during weathering of sandstones. Precipitation of baryte and anglesite caused an increase in the pH of the environment (from acid to the slightly basic), which allowed the precipitation of uranophane-α and malachite. URL Link na plný text Public work category ADN No. of Archival Copy 52777 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika 
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Title Supergénne minerály z U-Cu rudného výskytu Východná-Nižný Chmelienec v Nízkych Tatrách (hronikum, Slovensko) Par.title Supergene minerals from the U-Cu ore occurrence Východná-Nižný Chmelienec, the Nízke Tatry Mts. (Hronic Unit, Slovakia) Author info Eva Hoppanová ... [et al.] Author Hoppanová Eva 1995- (40%) UMBFP01 - Katedra geografie a geológie
Co-authors Ferenc Štefan 1977- (20%) UMBFP01 - Katedra geografie a geológie
Kopáčik Richard 1995- (10%) UMBFP01 - Katedra geografie a geológie
Budzák Šimon 1982- (15%) UMBFP08 - Katedra chémie
Mikuš Tomáš (15%)
Source document Bulletin Mineralogie Petrologie. Vol. 29, no. 1 (2021), s. 77-89. - Praha : Mgr. Jiří Sejkora, 2021 Keywords urán - uranium uránovo-medená mineralizácia supergénne minerály - supergene minerals Headings Geogr. Nízke Tatry (Slovensko : pohorie) Západné Karpaty (pohorie) Language Slovak Country Czech Republic URL Link na plný text Public work category ADM No. of Archival Copy 51530 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ References PERIODIKÁ-Súborný záznam periodika article
Title Primárna uránovo-medená mineralizácia v Selciach pri Banskej Bystrici Author info Ľuboš Polák, Štefan Ferenc Author Polák Ľuboš 1989- (60%) UMBFP01 - Katedra geografie a geológie
Co-authors Ferenc Štefan 1977- (40%) UMBFP01 - Katedra geografie a geológie
Source document Nerastné suroviny v 21. storočí : prieskum, výskum, ťažba, dopady : zborník vedeckých príspevkov z konferencie, Banská Štiavnica, 6.10. - 7.10. 2016. S. 44-45. - Bratislava : Slovenské národné múzeum - Prírodovedné múzeum, 2016 / Šottník Peter ; Peťková Katarína ; Voleková Bronislava ; Fridrichová Jana ; Nerastné suroviny v 21. storočí konferencia Keywords uránovo-medená mineralizácia ložiská nerastných surovín - deposits of raw materials pieskovce Headings Geogr. Selce (Slovensko) Language Slovak Country Slovak Republic systematics 55 Public work category AFD No. of Archival Copy 38701 Catal.org. BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici Database xpca - PUBLIKAČNÁ ČINNOSŤ 
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