Råde and Halvorsrød bröggerite
South-eastern Norway (Råde, Østfold; Halvorsrød not located), Norway
UraniumU, Th
- Type
- Metasomatic bröggerite (thorian uraninite)
Uranium ore sample from the Queen's University collection analysed by Uvarova et al. (2014) for δ238U and δ234U. Two bröggerites described by Killeen and Heier (1975), the only metasomatic deposits of the study, with δ238U near 0 and δ234U at equilibrium. Voinot et al. (2024) assign sample E2342 to Orrefjell, Uvarova et al. (2014) to Halvorsrød. Coordinates not published.
δ238U in ‰ (per mil) Values of the same system
Standard : NBL CRM 112-A
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −0.04 ± 0.1 ‰ | 1 | "bröggerite" (thorian uraninite) Single analysis; ± 0.10 ‰ (2 SD, reproducibility); sample E2343, Råde, Norway; bracketing-only δ238U at 0.00; 238U/235U of 137.831; about -0.64 ‰ after removing the 0.60 ‰ offset specific to this study. | Uvarova et al. (2014), Variations in the uranium isotopic compositions of uranium ores fr… | |
| 0.09 ± 0.1 ‰ | 1 | "bröggerite" (thorian uraninite) Single analysis; ± 0.10 ‰ (2 SD, reproducibility); sample E2342, Halvorsrød, Norway; bracketing-only δ238U at 0.00; 238U/235U of 137.848; about -0.51 ‰ after removing the 0.60 ‰ offset specific to this study; same sample as Voinot et al. (2024), published at -0.52 ‰; Voinot et al. (2024) assign this sample to Orrefjell. | Uvarova et al. (2014), Variations in the uranium isotopic compositions of uranium ores fr… |
δ234U in ‰ (per mil) Values of the same system
Standard : équilibre séculaire
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −1 ‰ | 1 | "bröggerite" (thorian uraninite) Single analysis; per-sample uncertainty not published; sample E2343, Råde, Norway. | Uvarova et al. (2014), Variations in the uranium isotopic compositions of uranium ores fr… | |
| 0 ‰ | 1 | "bröggerite" (thorian uraninite) Single analysis; per-sample uncertainty not published; sample E2342, Halvorsrød, Norway; Voinot et al. (2024) report -2.3 ‰ on the same sample; Voinot et al. (2024) assign this sample to Orrefjell. | Uvarova et al. (2014), Variations in the uranium isotopic compositions of uranium ores fr… |
Deposits of the same type
- Athabasca basin (unconformity uranium province) Canada
- Shea Creek (Athabasca) Canada
- Tim Mersoï basin (Arlit, Akouta, Imouraren) Niger
- Inkai (Chu-Sarysu basin) Kazakhstan
- Tulukuevskoye Russia
- Ty Gallen France
- Rophin France
- Key Lake (Deilmann and Gaertner) Canada
Cite this page
IsoFind Atlas (2026). Råde and Halvorsrød bröggerite, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/broggerite-de-rade-et-de-halvorsr-d/ (accessed 2026-10-16).
@misc{isofind2026radeandhalvorsrdbroggeriteiso,
title = {Råde and Halvorsrød bröggerite, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/broggerite-de-rade-et-de-halvorsr-d/},
note = {Accessed 2026-10-16}
}Updated : 2026-10-16