Vershinnoe
Buryatia, Vitim uranium district, Khiagda ore field, Russia
UraniumU
- Type
- Paleovalley sandstone-hosted uranium (basal infiltration type)
Paleovalley deposit about 8 km long beneath basalts, reserves of about 5.6 kt U at 0.040 % (B-1 body), in terrigenous rocks of the lower sub-unit of the Dzhilinda unit (Neogene); permafrost about 72 m thick since 2.5 Ma and CO2-bearing waters rising along faults. Finely dispersed ore of calcium uranium phosphate (ningyoite). Hole 6045: δ238U of -3.34 to -0.47 ‰ (2.87 ‰ over 20 m), heavier in the basaltic tuffs at the top and anomalously light in the sands at the base, read as the advance of a deposition front depleted in 238U; 234U/238U out of equilibrium everywhere (K234/238 of 0.85 to 1.33) and T(206Pb/238U) ages of 4.6 to 24.4 Ma: uranium migration within the last 1 Myr (Golubev et al., 2022). Coordinates not published.
δ238U in ‰ (per mil) Values of the same system
Standard : NBL CRM 112-A
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −0.83 ± 0.07 ‰ | 1 | bulk rock, lithoclastic basaltic tuff (top) Single analysis; ± 0.07 ‰ (2 SD, reproducibility); sample 6045/208.1 (depth in m); 238U/235U of 137.722; 134 µg/g U; T(206Pb/238U) age of 7.1 Ma. | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … | |
| −0.47 ± 0.07 ‰ | 1 | bulk rock, lithoclastic basaltic tuff (top) Single analysis; ± 0.07 ‰ (2 SD, reproducibility); sample 6045/209.3 (depth in m); 238U/235U of 137.772; 540 µg/g U; T(206Pb/238U) age of 12.3 Ma. | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … | |
| −0.89 ± 0.07 ‰ | 1 | bulk rock, lithoclastic basaltic tuff (top) Single analysis; ± 0.07 ‰ (2 SD, reproducibility); sample 6045/210.4 (depth in m); 238U/235U of 137.714; 1157 µg/g U; T(206Pb/238U) age of 24.4 Ma. | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … | |
| −1.01 ± 0.07 ‰ | 1 | bulk rock, mineralised sand Single analysis; ± 0.07 ‰ (2 SD, reproducibility); sample 6045/210.6 (depth in m); 238U/235U of 137.698; 1144 µg/g U; T(206Pb/238U) age of 10.8 Ma. | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … | |
| −1.1 ± 0.07 ‰ | 1 | bulk rock, mineralised sand Single analysis; ± 0.07 ‰ (2 SD, reproducibility); sample 6045/221.8 (depth in m); 238U/235U of 137.686; 5202 µg/g U; T(206Pb/238U) age of 20.9 Ma. | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … | |
| −0.86 ± 0.07 ‰ | 1 | bulk rock, mineralised sand Single analysis; ± 0.07 ‰ (2 SD, reproducibility); sample 6045/223.6 (depth in m); 238U/235U of 137.718; 3449 µg/g U; T(206Pb/238U) age of 17.3 Ma. | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … | |
| −1.07 ± 0.07 ‰ | 1 | bulk rock, mineralised sand Single analysis; ± 0.07 ‰ (2 SD, reproducibility); sample 6045/224.0 (depth in m); 238U/235U of 137.689; 386 µg/g U; T(206Pb/238U) age of 14.6 Ma. | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … | |
| −1.16 ± 0.07 ‰ | 1 | bulk rock, mineralised sand Single analysis; ± 0.07 ‰ (2 SD, reproducibility); sample 6045/227.7 (depth in m); 238U/235U of 137.677; 339 µg/g U; T(206Pb/238U) age of 7.2 Ma. | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … | |
| −3.34 ± 0.07 ‰ | 1 | bulk rock, mineralised sand (base) Single analysis; ± 0.07 ‰ (2 SD, reproducibility); sample 6045/229.2 (depth in m); 238U/235U of 137.377; 919 µg/g U; T(206Pb/238U) age of 4.6 Ma; lowest value of the study, isotopically very light uranium. | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … | |
| −1.67 ± 0.07 ‰ | 1 | bulk rock, mineralised sand (base) Single analysis; ± 0.07 ‰ (2 SD, reproducibility); sample 6045/229.8 (depth in m); 238U/235U of 137.607; 375 µg/g U; T(206Pb/238U) age of 8.5 Ma. | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … |
234U/238U isotope ratio, no unit Values of the same system
Standard : équilibre séculaire (5,497 × 10⁻⁵)
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.000059 | 1 | bulk rock, lithoclastic basaltic tuff (top) Single analysis; ± 2.7 ‰ (2 SD, reproducibility); sample 6045/208.1; 5.9 × 10⁻⁵, i.e. K234/238 (activity ratio) of 1.07; 234U excess: uranium gained recently (within 1 Myr according to the authors). | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … | |
| 0.000059 | 1 | bulk rock, lithoclastic basaltic tuff (top) Single analysis; ± 2.7 ‰ (2 SD, reproducibility); sample 6045/209.3; 5.9 × 10⁻⁵, i.e. K234/238 (activity ratio) of 1.07; 234U excess: uranium gained recently (within 1 Myr according to the authors). | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … | |
| 0.000055 | 1 | bulk rock, lithoclastic basaltic tuff (top) Single analysis; ± 2.7 ‰ (2 SD, reproducibility); sample 6045/210.4; 5.45 × 10⁻⁵, i.e. K234/238 (activity ratio) of 0.99; 234U deficit: uranium lost recently (within 1 Myr according to the authors). | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … | |
| 0.000047 | 1 | bulk rock, mineralised sand Single analysis; ± 2.7 ‰ (2 SD, reproducibility); sample 6045/210.6; 4.66 × 10⁻⁵, i.e. K234/238 (activity ratio) of 0.85; 234U deficit: uranium lost recently (within 1 Myr according to the authors). | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … | |
| 0.000053 | 1 | bulk rock, mineralised sand Single analysis; ± 2.7 ‰ (2 SD, reproducibility); sample 6045/221.8; 5.27 × 10⁻⁵, i.e. K234/238 (activity ratio) of 0.96; 234U deficit: uranium lost recently (within 1 Myr according to the authors). | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … | |
| 0.000049 | 1 | bulk rock, mineralised sand Single analysis; ± 2.7 ‰ (2 SD, reproducibility); sample 6045/223.6; 4.9 × 10⁻⁵, i.e. K234/238 (activity ratio) of 0.89; 234U deficit: uranium lost recently (within 1 Myr according to the authors). | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … | |
| 0.000053 | 1 | bulk rock, mineralised sand Single analysis; ± 2.7 ‰ (2 SD, reproducibility); sample 6045/224.0; 5.29 × 10⁻⁵, i.e. K234/238 (activity ratio) of 0.96; 234U deficit: uranium lost recently (within 1 Myr according to the authors). | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … | |
| 0.000059 | 1 | bulk rock, mineralised sand Single analysis; ± 2.7 ‰ (2 SD, reproducibility); sample 6045/227.7; 5.94 × 10⁻⁵, i.e. K234/238 (activity ratio) of 1.08; 234U excess: uranium gained recently (within 1 Myr according to the authors). | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … | |
| 0.000073 | 1 | bulk rock, mineralised sand (base) Single analysis; ± 2.7 ‰ (2 SD, reproducibility); sample 6045/229.2; 7.32 × 10⁻⁵, i.e. K234/238 (activity ratio) of 1.33; 234U excess: uranium gained recently (within 1 Myr according to the authors). | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … | |
| 0.000054 | 1 | bulk rock, mineralised sand (base) Single analysis; ± 2.7 ‰ (2 SD, reproducibility); sample 6045/229.8; 5.43 × 10⁻⁵, i.e. K234/238 (activity ratio) of 0.99; 234U deficit: uranium lost recently (within 1 Myr according to the authors). | Golubev et al. (2022), Uranium isotope variations (234U/238U and 238U/235U) and behavior … |
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Cite this page
IsoFind Atlas (2026). Vershinnoe, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/vershinnoe/ (accessed 2026-10-16).
@misc{isofind2026vershinnoeisotopesignatures,
title = {Vershinnoe, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/vershinnoe/},
note = {Accessed 2026-10-16}
}Updated : 2026-10-16