Research paperRadionuclide migration over recent geologic time in a granitic pluton
References (31)
- et al.
234U/238U activity ratios of dissolved uranium in ground-waters from a Jurassic limestone aquifer in England
Earth Planet. Sci. Lett.
(1982) - et al.
230Th-238U disequilibria in historical lavas from Iceland
Earth Planet. Sci. Lett.
(1981) - et al.
Tracing interaquifer connections in the Kefar Uriyya-Agur region (Israel), using natural uranium isotopes
J. Hydrol.
(1982) - et al.
The mobility of thorium in natural waters at low temperatures
Geochim. Cosmochim. Acta
(1980) - et al.
Uranium-series dating of Quaternary deposits
- et al.
Uranium-series disequilibrium studies of granitic rocks
- et al.
235U fission tracks and 238U-series disequilibria as a means to study recent mobilization of uranium in Archaean pyritic conglomerates
Earth Planet. Sci. Lett.
(1983) - et al.
Uranium-series disequilibrium in the sedimentary uranium deposit at Yelirrie, Western Australia
J. Geol. Soc. Aust.
(1981) - et al.
- et al.
Drilling and core logging programs at the Atikokan Research Area
The use of uranium-series disequilibrium to determine radionuclide migration on geologic time scales
The determination of U-Th-Ra isotopic ratios in granitic rocks
Uranium-series disequilibrium studies of Precambrian Shield rocks and ground-waters
High levels of uranium and radium in groundwaters at Canada's Underground Research Laboratory, Lac du Bonnet, Manitoba
Saline groundwaters and brines in plutons in the Canadian Shield
Geol. Assoc. Can., Spec. Publ.
Cited by (28)
<sup>226</sup>Ra/<sup>238</sup>U and <sup>228</sup>Th/<sup>228</sup>Ra disequilibrium as weathering indices in beach sand sediments associated with granitoids from Cyclades. Greece
2019, Applied GeochemistryCitation Excerpt :All the above can cause the mobilisation of the U isotopes (238U, 234U) and 226Ra which under oxidising conditions are significantly more mobile than 230Th. The latter is geochemically immobile and cannot be removed easily under the pH conditions expected during weathering (circumneutral) (Gascoyne and Schwarcz, 1986). There is also a possibility for its isotopic system to be out of secular equilibrium due to the presence of a-particle recoil.
U-Pb, Rb-Sr, and U-series isotope geochemistry of rocks and fracture minerals from the Chalk River Laboratories site, Grenville Province, Ontario, Canada
2013, Applied GeochemistryCitation Excerpt :The process of selection of radioactive waste disposal sites must include characterization not only of the current hydrogeology, but also of the long-term geologic stability of the host rocks. Investigations of rock and fracture mineral geochemistry are an important part of site characterization for radioactive waste disposal programs in crystalline rock (Smellie and Stuckless, 1985; Gascoyne and Schwarcz, 1986; Milton and Brown, 1987; Krauskopf, 1988; Guthrie, 1991; Rasilainen et al., 2003; Hu and Möri, 2008; Tullborg et al., 2008; Blyth et al., 2009; Drake and Tullborg, 2009). Establishing geochronological framework at the CRL site is needed to understand the history of rock forming and rock alteration processes in this part of the Canadian Shield.
Radioactive secular equilibrium in <sup>238</sup>U and <sup>232</sup>Th series in granitoids from Greece
2013, Applied Radiation and IsotopesCitation Excerpt :The use of uranium series disequilibrium in the geological sciences also includes applications such as determining the age of deposits younger than 1 Ma (Schwarcz and Gascoyne, 1984), mantle evolution (Condomines et al., 1988), hydrological tracing (Guttman and Kronfeld, 1982) and nuclear waste disposal (Schwarcz et al., 1982, Smellie, 1982). In the latter application, the 238U series technique examines the state of radioactive equilibrium, existing between the radionuclides of the 238U-decay series (Schwarcz et al., 1982; Smellie et al., 1986; Gascoyne and Schwarcz, 1986; Chapman and Smellie, 1986). When an isotopic system is undisturbed, it can be considered as closed.
Transport of <sup>234</sup>U in the Opalinus Clay on centimetre to decimetre scales
2009, Applied GeochemistryCitation Excerpt :Hence, studies of natural radionuclides, mostly those of the long-lived U-series are useful. They may provide relevant information concerning (sub-) recent mobility of these radionuclides in rock–water systems being considered for a radioactive waste repository (Schwarcz et al., 1982; Gascoyne and Schwarcz, 1986; Smellie et al., 1986; Luo et al., 2000; Neymark and Paces, 2000; De Craen et al., 2000; Paces et al., 2002; Gascoyne et al., 2002; Deschamps et al., 2004). The 238U-series radionuclides are of interest as they represent elements that will constitute a large body of radioactive waste (Langmuir, 1997) and may also serve as analogues of other radionuclides such as Pu (Choppin, 2006).
Further investigations on optimized tail correction and high-precision measurement of uranium isotopic ratios using multi-collector ICP-MS
2003, Chemical GeologyCitation Excerpt :Absolute dating of marine carbonates such as corals, used for paleo-sea level studies (Stirling et al., 2001; Gallup et al., 2002) and paleo-reconstitution of (234U/238U) seawater (Henderson, 2002), for instance. Studies of radionuclide migration in deep geological formations conducted to assess the safety of radioactive waste disposal in such environments (see, for example, Schwarcz et al., 1982; Smellie and Stuckless, 1985; Gascoyne and Schwarcz, 1986; Smellie et al., 1986; Gascoyne and Cramer, 1987; Ivanovich et al., 1992; Griffault et al., 1993). The second application is primarily concerned with determining whether a geological system is at secular equilibrium or not.
Uranium isotopic data in uraninite spent fuel from the Bangombe natural nuclear reactor (Gabon) and its surroundings
2000, Applied Radiation and Isotopes