Urgeiriça uranium province (sites 7 and 8)
Beira Alta, Canas de Senhorim (Nelas), Portugal
UraniumU
- Type
- Uranium veins in Hercynian granites
Vein-type uranium ore analysed by Keatley et al. (2021) for δ238U and δ234U (nuclear forensics). Spoil heaps of two disused mines (sites 7 and 8): oxidised autunite, δ238U of -0.47 to -0.07 ‰ and δ234U of -10.4 to +40.8 ‰. Indicative coordinates (Urgeiriça).
δ238U in ‰ (per mil) Values of the same system
Standard : NBL CRM 112-A
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −0.305 ± 0.04 ‰ | 1 | autunite Single analysis; ± 0.04 ‰ (2 SD); sample S701, site 7 of the Urgeiriça province; oxidised (U(VI)) phase according to the authors. | Keatley et al. (2021), Uranium isotope variation within vein-type uranium ore deposits, A… | |
| −0.409 ± 0.04 ‰ | 1 | autunite Single analysis; ± 0.04 ‰ (2 SD); sample S802, site 8 of the Urgeiriça province; oxidised (U(VI)) phase according to the authors. | Keatley et al. (2021), Uranium isotope variation within vein-type uranium ore deposits, A… | |
| −0.469 ± 0.04 ‰ | 1 | autunite Single analysis; ± 0.04 ‰ (2 SD); sample S804, site 8 of the Urgeiriça province; oxidised (U(VI)) phase according to the authors. | Keatley et al. (2021), Uranium isotope variation within vein-type uranium ore deposits, A… | |
| −0.159 ± 0.04 ‰ | 1 | autunite Single analysis; ± 0.04 ‰ (2 SD); sample S803, site 8 of the Urgeiriça province; oxidised (U(VI)) phase according to the authors. | Keatley et al. (2021), Uranium isotope variation within vein-type uranium ore deposits, A… | |
| −0.073 ± 0.04 ‰ | 1 | autunite Single analysis; ± 0.04 ‰ (2 SD); sample S805, site 8 of the Urgeiriça province; oxidised (U(VI)) phase according to the authors. | Keatley et al. (2021), Uranium isotope variation within vein-type uranium ore deposits, A… |
δ234U in ‰ (per mil) Values of the same system
Standard : équilibre séculaire
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0 ± 0.4 ‰ | 1 | autunite Single analysis; ± 0.4 ‰ (2 SD); sample S701, site 7 of the Urgeiriça province; oxidised (U(VI)) phase according to the authors. | Keatley et al. (2021), Uranium isotope variation within vein-type uranium ore deposits, A… | |
| 40.8 ± 0.4 ‰ | 1 | autunite Single analysis; ± 0.4 ‰ (2 SD); sample S802, site 8 of the Urgeiriça province; oxidised (U(VI)) phase according to the authors. | Keatley et al. (2021), Uranium isotope variation within vein-type uranium ore deposits, A… | |
| 26.8 ± 0.4 ‰ | 1 | autunite Single analysis; ± 0.4 ‰ (2 SD); sample S804, site 8 of the Urgeiriça province; oxidised (U(VI)) phase according to the authors. | Keatley et al. (2021), Uranium isotope variation within vein-type uranium ore deposits, A… | |
| −8.5 ± 0.4 ‰ | 1 | autunite Single analysis; ± 0.4 ‰ (2 SD); sample S803, site 8 of the Urgeiriça province; oxidised (U(VI)) phase according to the authors. | Keatley et al. (2021), Uranium isotope variation within vein-type uranium ore deposits, A… | |
| −10.4 ± 0.4 ‰ | 1 | autunite Single analysis; ± 0.4 ‰ (2 SD); sample S805, site 8 of the Urgeiriça province; oxidised (U(VI)) phase according to the authors. | Keatley et al. (2021), Uranium isotope variation within vein-type uranium ore deposits, A… |
Deposits of the same type
- Guarda uranium province (site 1) Portugal
- Ty Gallen France
- Littleham Cove (Devon) United Kingdom
- Rophin France
- Schlema-Alberoda Germany
- Jáchymov Czechia
- Příbram (uranium district) Czechia
- Stráž pod Ralskem Czechia
Cite this page
IsoFind Atlas (2026). Urgeiriça uranium province (sites 7 and 8), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/province-uranifere-d-urgeirica-sites-7-et-8/ (accessed 2026-10-16).
@misc{isofind2026urgeiricauraniumprovincesites,
title = {Urgeiriça uranium province (sites 7 and 8), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/province-uranifere-d-urgeirica-sites-7-et-8/},
note = {Accessed 2026-10-16}
}Updated : 2026-10-16