Kiggavik
Nunavut, Thelon Basin (Baker Lake), Canada
UraniumU
- Type
- Unconformity-contact Proterozoic uranium (IAEA class 7.1)
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. Thelon Basin deposit (age of 1284 Ma used); δ238U of +0.13 ‰, δ234U of -12.64 ‰ and ε205Tl of -3.5. Indicative coordinates.
δ238U in ‰ (per mil) Values of the same system
Standard : NBL CRM 112-A
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.13 ‰ | 1 | uranium ore Single analysis; per-sample uncertainty not published; sample U406; IAEA class 7.1. Unconformity-contact (Proterozoic unconformity); average age used 1284 Ma; 50.9 % U, 1.8 µg/g Tl, 12.52 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 |
|---|---|---|---|---|
| −12.64 ‰ | 1 | uranium ore Single analysis; per-sample uncertainty not published; sample U406; IAEA class 7.1. Unconformity-contact (Proterozoic unconformity); average age used 1284 Ma; 50.9 % U, 1.8 µg/g Tl, 12.52 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 |
|---|---|---|---|---|
| −3.5 ± 0.6 ε | 1 | uranium ore Single analysis; ± 0.6 (2 SD); sample U406; IAEA class 7.1. Unconformity-contact (Proterozoic unconformity); average age used 1284 Ma; 50.9 % U, 1.8 µg/g Tl, 12.52 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
- McArthur River (Athabasca) Canada
- Athabasca basin (unconformity uranium province) Canada
- Key Lake (Deilmann and Gaertner) Canada
- Ace-Fay (Beaverlodge district) Canada
- Eagle-Ace (Beaverlodge district) Canada
- Shea Creek (Athabasca) Canada
- Echo Bay (Port Radium) Canada
- Ingersoll Mine (Black Hills) United States
Cite this page
IsoFind Atlas (2026). Kiggavik, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/kiggavik/ (accessed 2026-10-16).
@misc{isofind2026kiggavikisotopesignatures,
title = {Kiggavik, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/kiggavik/},
note = {Accessed 2026-10-16}
}Updated : 2026-10-16