Stráž pod Ralskem
Northern Bohemia, Bohemian Cretaceous Basin, Czechia
UraniumU
- Type
- Sandstone-hosted uranium
Deposit of the low-temperature redox category in the study of uranium ore concentrates (yellowcake) from 40 mines. Uranium precipitated by low-temperature U(VI) to U(IV) reduction below the water table: concentrates richer in 238U (mean 137.887 ± 0.072, 2SD) and 235U/234U scattered by exchange with modern groundwater (Brennecka et al., 2010). Anomalously low 235U/234U (234U excess), already seen in the ore by Richter et al. (1999) and ascribed to plutonium (238Pu) contamination; 236U/235U of about 3.5 × 10⁻⁶. Indicative coordinates (Stráž pod Ralskem).
238U/235U isotope ratio, no unit Values of the same system
Standard : CRM 129-A (rapport absolu, double traceur 236U-233U)
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 137.848 ± 0.018 | 1 | uranium ore concentrate (yellowcake) Single analysis; low-temperature redox category; anomalously low 235U/234U (234U excess), already seen in the ore by Richter et al. (1999) and ascribed to plutonium (238Pu) contamination; 236U/235U of about 3.5 × 10⁻⁶. | Brennecka et al. (2010), Natural variations in uranium isotope ratios of uranium ore conc… |
235U/234U isotope ratio, no unit Values of the same system
Standard : CRM 129-A (rapport absolu, double traceur 236U-233U)
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 83.63 ± 0.42 | 1 | uranium ore concentrate (yellowcake) Single analysis; low-temperature redox category. | Brennecka et al. (2010), Natural variations in uranium isotope ratios of uranium ore conc… |
Deposits of the same type
- Schlema-Alberoda Germany
- Zálesí Czechia
- Rophin France
- Ty Gallen France
- Tim Mersoï basin (Arlit, Akouta, Imouraren) Niger
- Mounana Gabon
- Inkai (Chu-Sarysu basin) Kazakhstan
- Shinkolobwe République démocratique du Congo
Cite this page
IsoFind Atlas (2026). Stráž pod Ralskem, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/straz-pod-ralskem/ (accessed 2026-10-15).
@misc{isofind2026strazpodralskemisotopesignatu,
title = {Stráž pod Ralskem, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/straz-pod-ralskem/},
note = {Accessed 2026-10-15}
}Updated : 2026-10-15