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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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$a 10.46861/bmp.28.364 $2 DOI 035 $a biblio/233807 $2 CREPC2 100 $a 20210115d2020 m y slo 03 ba 101 0-
$a slo 102 $a CZ 200 1-
$a Kremeňovo-karbonátové žily s U-Mo-Cu mineralizáciou v permských intermediárnych až bázických vulkanitoch hronika na lokalite Kravany (Kozie chrbty, východné Slovensko) $d 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) $f Štefan Ferenc, Tomáš Mikuš ... [et al.] 330 $a 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. 463 -1
$1 001 umb_un_cat*0292539 $1 011 $a 2570-7337 $1 011 $a 2570-7345 $1 200 1 $a Bulletin Mineralogie Petrologie $v Roč. 28, č. 2 (2020), s. 364-384 $1 210 $a Praha $c Mgr. Jiří Sejkora $d 2020 606 0-
$3 umb_un_auth*0288441 $a uraninit $X uraninite 606 0-
$3 umb_un_auth*0049008 $a horniny $X rocks 606 0-
$3 umb_un_auth*0179547 $a hronikum 607 -1
$3 umb_un_auth*0098733 $a Západné Karpaty (pohorie) $X Western Carpathians Mountains 607 -1
$3 umb_un_auth*0098150 $a Slovensko východné $X Slovakia, Eastern 607 -1
$3 umb_un_auth*0202776 $a Kozie chrbty 608 $3 umb_un_auth*0273282 $a články $X journal articles 700 -1
$3 umb_un_auth*0202192 $a Ferenc $b Štefan $f 1977- $p UMBFP01 $4 070 $9 50 $T Katedra geografie a geológie 701 -1
$3 umb_un_auth*0249241 $a Mikuš $b Tomáš $4 070 $9 15 701 -0
$3 umb_un_auth*0024745 $a Spišiak $b Ján $f 1953- $9 15 $4 070 $p UMBFP01 $T Katedra geografie a geológie 701 -1
$a Kopáčik $b Richard $4 070 $9 10 $3 umb_un_auth*0255026 $p UMBFP01 $q 1 $f 1995- $T Katedra geografie a geológie 701 -1
$a Hoppanová $b Eva $4 070 $9 10 $3 umb_un_auth*0268238 $p UMBFP01 $q 1 $f 1995- $T Katedra geografie a geológie 801 $a SK $b BB301 $g AACR2 $9 unimarc sk 856 $u http://www.bullmineral.cz/paper/download/260/fulltext $a Link na plný text T85 $x existuji fulltexy
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