Madawaska
Ontario, Bancroft area, Canada
UraniumU
- Type
- Intrusive uranium
Deposit of the high-temperature redox category in the study of uranium ore concentrates (yellowcake) from 40 mines. Uranium reduced at high temperature (igneous or metamorphic processes): clustered 238U/235U, indistinguishable from the non-redox conglomerates (common mean 137.833 ± 0.034, 2SD), and 235U/234U close to secular equilibrium (Brennecka et al., 2010). See Faraday, the same deposit under its 1954 to 1964 name. Coordinates of the Madawaska mine after Wikipedia.
238U/235U isotope ratio, no unit Values of the same system
Standard : CRM 129-A (rapport absolu, double traceur 236U-233U)
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 137.847 ± 0.018 | 1 | uranium ore concentrate (yellowcake) Single analysis; high-temperature redox category; see Faraday, the same deposit under its 1954 to 1964 name. | Brennecka et al. (2010), Natural variations in uranium isotope ratios of uranium ore conc… |
235U/234U isotope ratio, no unit Values of the same system
Standard : CRM 129-A (rapport absolu, double traceur 236U-233U)
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 132.02 ± 0.42 | 1 | uranium ore concentrate (yellowcake) Single analysis; high-temperature redox category. | Brennecka et al. (2010), Natural variations in uranium isotope ratios of uranium ore conc… |
Deposits of the same type
- Faraday Canada
- Denison Canada
- Milliken Lake Canada
- Stanleigh Canada
- Stanrock Canada
- Billiken Lode (Critchell area) United States
- Marshall Pass district United States
- McArthur River (Athabasca) Canada
Cite this page
IsoFind Atlas (2026). Madawaska, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/madawaska/ (accessed 2026-10-15).
@misc{isofind2026madawaskaisotopesignatures,
title = {Madawaska, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/madawaska/},
note = {Accessed 2026-10-15}
}Updated : 2026-10-15