| Názov | Kremeňovo-karbonátové žily s U-Mo-Cu mineralizáciou v permských intermediárnych až bázických vulkanitoch hronika na lokalite Kravany (Kozie chrbty, východné Slovensko)
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| Súbež.n. | Quartz-carbonate veins containing U-Mo-Cu mineralization in the Permian intermediate to basic volcanic rocks of the Hronicum Unit at Kravany (Kozie chrbty Mts., Eastern Slovakia)
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| Aut.údaje | Štefan Ferenc, Tomáš Mikuš ... [et al.]
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| Autor | Ferenc Štefan 1977- (50%) UMBFP01 - Katedra geografie a geológie
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| Spoluautori | Mikuš Tomáš (15%)
Spišiak Ján 1953- (15%) UMBFP01 - Katedra geografie a geológie
Kopáčik Richard 1995- (10%) UMBFP01 - Katedra geografie a geológie
Hoppanová Eva 1995- (10%) UMBFP01 - Katedra geografie a geológie
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| Zdroj.dok. | Bulletin Mineralogie Petrologie. Roč. 28, č. 2 (2020), s. 364-384. - Praha : Mgr. Jiří Sejkora, 2020
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| Kľúč.slová |
uraninit - uraninite
horniny - rocks
hronikum
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| Heslá geogr. | Západné Karpaty (pohorie)
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| Slovensko východné
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| Kozie chrbty
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| Form.deskr. | články - journal articles
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| Jazyk dok. | slovenčina
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| Krajina | Česká republika
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| Anotácia | Historical uranium ore deposit Kravany is located in the eastern part of Kozie Chrbty Mts., approximately 9 km SW of the district town Poprad. Stratiform, infiltration U-Cu-Pb mineralization is bound to the Upper Permian clastic sediments (Kravany Beds, member of Malužiná Formation, Hronicum Unit), which are enriched in fragments of carbonized flora. Vein U-Mo-Cu mineralization was found in the Upper Permian intermediate to basic volcanics intersecting the sediments of the Kravany Beds (also ore lenses). Vein filling originated in the following development stages: I.) Quartz-pyrite (quartz, pyrite, marcasite), II.) Dolomite-pyrite (dolomite, pyrite, marcasite, galena), III.) Copper (tetrahedrite, tennantite, chalcopyrite), IV.) Uranium-molybdenum (uraninite, Pb-Mo-S phase, coffinite, quartz), and V.) Calcite (calcite, chalcopyrite). The formation of mineralization can be explained by the geological position: random emplacement of the diorite porphyrites, resp. basaltoid andesites dikes, directly in the preexisting U,Mo-bearing sediments. Vein U-Mo-Cu mineralization could thus most likely have formed according to the following scenario: I.) sedimentation of Kravany Beds in the Permian riftogenic basin: formation of beds of arkoses and arkosic sandstones with abundant fragments of charred flora, II.) formation of infiltration U mineralization: reduction and accumulation of U in sediments rich in organic matter, III.) emplacement of dikes of intermediate to basic volcanics: intersection of sediments with organics and with high U and Mo content, mobilization of formation fluids, assimilation of U and Mo into intermediate-basic magma, IV.) cooling of volcanic bodies → their contraction (formation of contraction cracks) → filling of contraction cracks with quartz, carbonates and ore minerals (crystallization from residual magmatic solutions mixed with formation waters). From this point of view it is syngenetic volcanogenic vein U-Mo-Cu mineralization, originally of the Permian age, with subsequent Alpine (most probably Cretaceous) reworking (this is evidenced by the variable composition of uraninite). It belongs to the Neohercynian late- to postorogenic metallogenetic stage. The possible younger, post-Permian age of mineralization from alpine hydrothermal solutions must also be assumed, but this consideration has several inconsistencies.
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| URL | Link na plný text
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| Kategória publikačnej činnosti | ADM
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| Číslo archívnej kópie | 49312
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| Kategória ohlasu | KONDELA, Julián - HREUS, Sebastián. Uranium mining restriction in Slovakia from the perspective of actual raw material situation. In International conference mineral deposits safeguarding as a basis of mineral raw materials safety : books of abstracts, Kraków, 10th-11th May 2022. Kraków : Mineral and energy economy research institute PAS, 2022. ISBN 978-83-964171-5-2, pp. 33-34.
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| Katal.org. | BB301 - Univerzitná knižnica Univerzity Mateja Bela v Banskej Bystrici
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| Báza dát | xpca - PUBLIKAČNÁ ČINNOSŤ
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| Odkazy | PERIODIKÁ-Súborný záznam periodika
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