Montenegro Mine (Oriente)
Former Oriente Province, Cuba
OtherMn
- Type
- Todorokite-bearing manganese deposit
Cuban Oriente manganese deposit known from a Smithsonian todorokite specimen (NMNH 161707), a 3×3 tunnel Mn oxide typical of hydrothermal Fe-Mn deposits. Tl at 14.6 µg/g and ε205Tl of -1.1, close to mantle and crust: without Tl oxidation on the todorokite surface, no 205Tl enrichment, and no measurable fractionation in experimental adsorption in artificial seawater (log Kd 3.3) (Wang et al., 2026). Published coordinates (Table 1).
ε205Tl in ε units (parts per 10,000) Values of the same system
Standard : NIST SRM 997
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −1.09 ± 0.08 ε | 1 | todorokite (specimen NMNH 161707) Value before the adsorption experiment, -1.09 ± 0.08 (2SD of repeat measurements, Table S1), -1.1 in the text; long-term reproducibility about ± 0.3 ε; 14.6 µg/g Tl in the text but 10.52 ppm in Table S1; unchanged after 24 h in artificial seawater (filter -0.87 ± 0.30). | Wang et al. (2026), Thallium isotopic fractionation during adsorption onto natural mangan… |
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Cite this page
IsoFind Atlas (2026). Montenegro Mine (Oriente), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/mine-montenegro-oriente/ (accessed 2026-10-16).
@misc{isofind2026montenegromineorienteisotopes,
title = {Montenegro Mine (Oriente), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/mine-montenegro-oriente/},
note = {Accessed 2026-10-16}
}Updated : 2026-10-16