North Bohemian Uranium District, Liberec Region, Bohemia (Böhmen; Boehmen), Czech Republic

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uranová ložiska severočeské křídy

Important uranium accumulations at the base of Cretaceous (Cenomanian) sediments. Several so-called deposits (Stráž, Hamr, Holičky, Osečná – Kotel, Břevniště, Hvězdov) were exploited by underground mining and acid leaching.

Characteristic for these deposits is a U-Zr-P-Ti (mostly microscopic) mineralization within a sandstone matrix. The mineralization is divided between a uranium and a uranium-zirconium subtype. Major minerals with economical importance are oxides of U4+ (uraninite s.l.), ningyoite and uranium-bearing "hydrozircon". Less abundant are "uranium-bearing leucoxens s.l.", coffinite and vyacheslavite.

References

- Scharm, B.: Přehled minerálů nalezených v oblasti uranových koncentrací v severočeské křídě. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1995, roč. 3, s. 169-172.
- Scharm, B., Scharmová, M., Sulovský, P. and Kühn, P. (1991): Philipsbornite, arsenoflorencite-(La), and arsenoflorencite-(Nd) from the uranium district in northern Bohemia, Czechoslovakia. Casopis mineral. geol. 36, 103-113.

Mineral List

Acanthite Allanite-(Ce) Alunogen Anatase Anglesite Ankerite 'Apatite' Armalcolite Arsenoflorencite-(Ce) Arsenoflorencite-(La) Arsenoflorencite-(Nd) Arsenogoyazite Arsenopyrite Arsenowaylandite Asbolane Autunite Baddeleyite Bannermanite Baryte Bismuthinite Brockite Bromargyrite Calcite Calkinsite-(Ce) Carrollite Cassiterite Cattierite Celestine Cerussite Chalcanthite Chalcocite Chalcopyrite Cheralite Chernovite-(Y)

Churchite-(Y) Cinnabar Clausthalite Cobaltite Coffinite Copiapite Coronadite Covellite Crandallite Dolomite Duranusite Dyscrasite Florencite-(Ce) Florencite-(La) Florencite-(Nd) Fluorite Galena Gersdorffite Gold Gorceixite Goyazite Gudmundite Gypsum Hematite Hercynite var: Picotite Hollandite Illite Ilsemannite Jarosite Jordisite Kaolinite Kyanite Langisite Löllingite

Marcasite Melanterite Mohrite Molybdenite Monazite-(Ce) Monazite-(La) Montmorillonite Muscovite Naumannite Nickeline Nickelzippeite Ningyoite Opal Pearceite Philipsbornite Pickeringite Plumbogummite Polybasite Pseudobrookite Pseudorutile Pyrite var: Bravoite Pyrrhotite Quartz Rammelsbergite Realgar Rhabdophane-(Ce) Rhabdophane-(Nd) Rutile Safflorite Seligmannite Siderite Siegenite Silver

Skutterudite Sphalerite Spinel Stannite Staurolite Stephanite Stibnite Stromeyerite Svanbergite Synchysite-(Ce) Synchysite-(Nd) Synchysite-(Y) Szomolnokite Tamarugite Tennantite Tetrahedrite Thenardite Trögerite Tschermigite Uraninite Uranopilite Vaesite Vyacheslavite Waylandite Wittichenite Woodhouseite Wulfenite Xenotime-(Y) Zincite Zippeite Zircon

133 entries listed. 127 valid minerals.