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  • Genetic characteristics of the uranium deposit Žirovski vrh, Yugoslavia
    Dolenec, Tadej ; Lukacs, Egon ; Pezdič, Jože
    Pseudomorphs of pitcblende and coffinite after plant remains, a wide range of [delta] [sub] 34 S values, and enrichment of sulfide sulfur with light isotope indicate formation during diagenesis of ... the uranium deposit Žirovski vrh in the reducing environment of gröden sandstones. Due to subsidence from Upper Permian to Cretaceous the deposit was buried 6000 m deep. Dissolution and precipitation of minerals occured during epigenesis at higher temperatures. In the orebearing horizon rock minerals and sulfides were remobilized, but not pitchblende and coffinite. Movments if the Miocene Rhodanian orogenic phase, to which the beginning of retrograde epigenesis is attached, uplifted the orebearing beds close to the surface and overthrusted them on autochtonous Triassic. Then formed the folded structure of the deposit cleavage and most of quartz-carbonate veins and nests. In the orebearing horizon during the retrograde epigenesis silfides and barren minerals were intensively remobilized, and les pitchblende and coffinite. By oxydation processes in the upper parts of the deposit started precipitation ofcementation copper minerals and secondary uranium minerals.
    Source: Geological environments of sandstone-type uranium deposits : Report of the working group on uranium geology organized by the International atomic energy agency : IAEA-TECDOC-328 (TECDOC-328, IAEA, 1985, str. 99-116)
    Type of material - conference contribution ; adult, serious
    Publish date - 1985
    Language - english
    COBISS.SI-ID - 58206

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