Ivisaartoq
South-west Greenland (Malene supracrustal sequence), Greenland
OtherW
- Type
- Stratiform scheelite in tourmalinites
Stratiform tungsten in tourmalinites of the Malene supracrustal sequence (about 2.8 to 3.1 Ga), among the oldest known tungsten mineralisations. Approximate position. Indicative coordinates.
206Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 13.891 ± 1.269 | 12.767 / 15.704 | 4 | scheelite Mean and standard deviation recalculated from 4 samples, Table 2. Measured ratios, not age-corrected: the author regards them as close to initial common lead. Highly scattered (206Pb/204Pb from 12.77 to 15.70): uranium added after mineralisation; the least radiogenic (12.767) dates deposition at about 2.99 Ga. Spelled Ivisartoq in the article. | Chiaradia (2003), The evolution of tungsten sources in crustal mineralization from Archea… |
207Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 14.287 ± 0.267 | 14.056 / 14.67 | 4 | scheelite Mean and standard deviation recalculated from 4 samples, Table 2. Measured ratios, not age-corrected: the author regards them as close to initial common lead. Highly scattered (206Pb/204Pb from 12.77 to 15.70): uranium added after mineralisation; the least radiogenic (12.767) dates deposition at about 2.99 Ga. Spelled Ivisartoq in the article. | Chiaradia (2003), The evolution of tungsten sources in crustal mineralization from Archea… |
208Pb/204Pb isotope ratio, no unit Values of the same system
Standard : NIST SRM 981
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 33.21 ± 0.437 | 32.892 / 33.851 | 4 | scheelite Mean and standard deviation recalculated from 4 samples, Table 2. Measured ratios, not age-corrected: the author regards them as close to initial common lead. Highly scattered (206Pb/204Pb from 12.77 to 15.70): uranium added after mineralisation; the least radiogenic (12.767) dates deposition at about 2.99 Ga. Spelled Ivisartoq in the article. | Chiaradia (2003), The evolution of tungsten sources in crustal mineralization from Archea… |
Deposits of the same type
- Lower Twin Lake mine United States
- Bradley mine United States
- Unnamed mine, Wanaque quadrangle United States
- Splitrock mine United States
- Franklin United States
- Furnace Bed (Pikes Peak mine) United States
- Sterling Hill United States
- Tar Hill mine United States
Cite this page
IsoFind Atlas (2026). Ivisaartoq, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/ivisaartoq/ (accessed 2026-10-13).
@misc{isofind2026ivisaartoqisotopesignatures,
title = {Ivisaartoq, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/ivisaartoq/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13