Nicholson (Beaverlodge district)
Saskatchewan, Beaverlodge district, north shore of Lake Athabasca, Canada
UraniumU (Au, Pt, Pd, Se)
- Type
- Polymetallic uraninite veins in metamorphic rocks (IAEA class 6.2.2)
Uranium ore sample from the Queen's University collection analysed by Voinot et al. (2024) for U, Mo and Tl; ε205Tl and δ238U decrease together in metamorphic and unconformity deposits (U reduction and Tl redox change), whereas δ97Mo is strongly modified by late remobilisation. Polymetallic veins (age of 2290 Ma used); extremely low δ97Mo (-10.2 and -5.1 ‰), ascribed to loss of heavy Mo and capture of light Mo by secondary phases during late remobilisation. 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 ‰ | 1 | uranium ore Single analysis; per-sample uncertainty not published; full-procedure duplicate at +0.03; sample M6939 (Uvarova et al., 2014, place it at St Just (Wheal Owles), Cornwall); IAEA class 6.2.2. Polymetallic Veins (metamorphic); average age used 2290 Ma; 80.63 % U, 76.98 µg/g Tl, 57.66 µg/g Mo. | Voinot et al. (2024), Tl, Mo and U isotopes in U-ore deposits record Earth's fundamental … | |
| 0.06 ‰ | 1 | uranium ore Single analysis; per-sample uncertainty not published; sample M13323 (Uvarova et al., 2014, place it at Cornwall); IAEA class 6.2.2. Polymetallic Veins (metamorphic); average age used 2290 Ma; 65.49 % U, 8.73 µg/g Tl, 16.18 µg/g Mo. | Voinot et al. (2024), Tl, Mo and U isotopes in U-ore deposits record Earth's fundamental … |
δ234U in ‰ (per mil) Values of the same system
Standard : équilibre séculaire
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −0.85 ‰ | 1 | uranium ore Single analysis; per-sample uncertainty not published; full-procedure duplicate at -2.0; sample M6939 (Uvarova et al., 2014, place it at St Just (Wheal Owles), Cornwall); IAEA class 6.2.2. Polymetallic Veins (metamorphic); average age used 2290 Ma; 80.63 % U, 76.98 µg/g Tl, 57.66 µg/g Mo. | Voinot et al. (2024), Tl, Mo and U isotopes in U-ore deposits record Earth's fundamental … | |
| −2 ‰ | 1 | uranium ore Single analysis; per-sample uncertainty not published; sample M13323 (Uvarova et al., 2014, place it at Cornwall); IAEA class 6.2.2. Polymetallic Veins (metamorphic); average age used 2290 Ma; 65.49 % U, 8.73 µg/g Tl, 16.18 µg/g Mo. | Voinot et al. (2024), Tl, Mo and U isotopes in U-ore deposits record Earth's fundamental … |
ε205Tl in ε units (parts per 10,000) Values of the same system
Standard : NIST SRM 997
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −4.5 ± 0.5 ε | 1 | uranium ore Single analysis; ± 0.5 (2 SD); full-procedure duplicate at -4.8 ± 0.6; sample M6939 (Uvarova et al., 2014, place it at St Just (Wheal Owles), Cornwall); IAEA class 6.2.2. Polymetallic Veins (metamorphic); average age used 2290 Ma; 80.63 % U, 76.98 µg/g Tl, 57.66 µg/g Mo. | Voinot et al. (2024), Tl, Mo and U isotopes in U-ore deposits record Earth's fundamental … | |
| −2.9 ± 0.7 ε | 1 | uranium ore Single analysis; ± 0.7 (2 SD); sample M13323 (Uvarova et al., 2014, place it at Cornwall); IAEA class 6.2.2. Polymetallic Veins (metamorphic); average age used 2290 Ma; 65.49 % U, 8.73 µg/g Tl, 16.18 µg/g Mo. | Voinot et al. (2024), Tl, Mo and U isotopes in U-ore deposits record Earth's fundamental … |
δ97Mo in ‰ (per mil) Values of the same system
Standard : NIST SRM 3134
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −10.2 ± 0.2 ‰ | 1 | uranium ore Single analysis; ± 0.2 (2 SD); full-procedure duplicate at -10.0 ± 0.2; sample M6939 (Uvarova et al., 2014, place it at St Just (Wheal Owles), Cornwall); IAEA class 6.2.2. Polymetallic Veins (metamorphic); average age used 2290 Ma; 80.63 % U, 76.98 µg/g Tl, 57.66 µg/g Mo. | Voinot et al. (2024), Tl, Mo and U isotopes in U-ore deposits record Earth's fundamental … | |
| −5.1 ± 0.2 ‰ | 1 | uranium ore Single analysis; ± 0.2 (2 SD); sample M13323 (Uvarova et al., 2014, place it at Cornwall); IAEA class 6.2.2. Polymetallic Veins (metamorphic); average age used 2290 Ma; 65.49 % U, 8.73 µg/g Tl, 16.18 µg/g Mo. | Voinot et al. (2024), Tl, Mo and U isotopes in U-ore deposits record Earth's fundamental … |
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). Nicholson (Beaverlodge district), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/nicholson-district-de-beaverlodge/ (accessed 2026-10-16).
@misc{isofind2026nicholsonbeaverlodgedistricti,
title = {Nicholson (Beaverlodge district), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/nicholson-district-de-beaverlodge/},
note = {Accessed 2026-10-16}
}Updated : 2026-10-16