caa a22 4500 378927329 CHVBK 20180305123621.0 cr unu---uuuuu 161128e20041101xx s 000 0 eng 10.1524/ract.92.9.797.54972 doi (NATIONALLICENCE)gruyter-10.1524/ract.92.9.797.54972 Mobility of uranium in tertiary argillaceous sediments - a natural analogue study [Elektronische Daten] [Ulrich Noseck, Thomas Brasser, Petr Rajlich, Ales Laciok, Mirek Hercik] The aim of the Natural Analogue study at Ruprechtov site (CZ) is to investigate the potential mobility of uranium in tertiary argillaceous sediments under representative long-term conditions. Such sediments often build up the overburden of host rocks for deep geological waste repositories. The Ruprechtov site represents a tertiary basin with argillized volcano-detritic sediments, which is surrounded by granite and underlain by kaolin and granite. U-enrichment mainly occurs in distinct layers of limited thickness on top of the kaolin close to aquiferous horizons and the clay-lignite seams. After a general survey of the site a new set of drillings has been sunk in 2002 in order to investigate the hydraulic, geological and chemical conditions of the area, including detailed investigations of kaolin and granite. Based on actual results new conceptual models for geological evolution and uranium transport pathways at Ruprechtov site have been developed. There is now strong evidence that U-migration at the site is mainly determined by three different processes: a) diffusion through kaolin, b) advection via fault zones across the kaolin and c) advection through aquiferous layers at the interface kaolin/Tertiary. Uranium source is the so-called Erzgebirgs- (Krušné hory) granite, underlying the Tertiary and kaolin and outcropping at the margins of the Tertiary basin. © 2004 Oldenbourg Wissenschaftsverlag GmbH Laboratory techniques, experiments nationallicence Analytical chemistry nationallicence Inorganic chemistry nationallicence Noseck Ulrich aut Brasser Thomas aut Rajlich Petr aut Laciok Ales aut Hercik Mirek aut Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 92/9-11/2004(2004-11-01), 797-803 0033-8230 92:9-11/2004<797 2004 92 ract https://doi.org/10.1524/ract.92.9.797.54972 text/html Onlinezugriff via DOI 1 research article jats NATIONALLICENCE 856 40 https://doi.org/10.1524/ract.92.9.797.54972 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Noseck Ulrich aut NATIONALLICENCE 700 1- Brasser Thomas aut NATIONALLICENCE 700 1- Rajlich Petr aut NATIONALLICENCE 700 1- Laciok Ales aut NATIONALLICENCE 700 1- Hercik Mirek aut NATIONALLICENCE 773 0- Radiochimica Acta/International journal for chemical aspects of nuclear science and technology Oldenbourg Wissenschaftsverlag GmbH 92/9-11/2004(2004-11-01), 797-803 0033-8230 92:9-11/2004<797 2004 92 ract CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-gruyter