Kuittila (Hattu schist belt)
North Karelia, Ilomantsi, Hattu schist belt, Finland
Orogenic goldAu (Mo, W)
- Type
- Gold and Mo-W in a tonalite
Archaean schist belt (2.76 to 2.72 Ga) of the Karelian domain, with felsic to intermediate volcano-sedimentary rocks cut by tonalites, granodiorites and felsic porphyries; Au-Bi-Te gold in shear zones, older than the metamorphic peak (500 to 600 °C, 3 to 5 kbar, about 2.70 Ga). Gold entirely hosted by the Kuittila tonalite (2745 ± 10 Ma) and its sericite schist enclaves; quartz-molybdenite-scheelite-tourmaline stockwork dated at 2778 Ma (Re-Os on molybdenite). Molnár et al. (2016): tourmaline δ11B, sulphide δ34S and chalcopyrite δ65Cu.
δ11B in ‰ (per mil) Values of the same system
Standard : NIST SRM 951
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −14.2 ± 1.5 ‰ | −17.3 / −12.2 ‰ | 19 | tourmaline of Mo-W veins on the western margin of the Kuittila pluton (type 2) (P07061207) Mean and standard deviation recalculated from 19 analyses, -17.3 to -12.2 (-13.6; -12.3; -17.3; -16.2; -15.3; -14.6; -15.3; -15.7; -12.3; -12.2; -14.3; -13.5; -14.8; -15.8; -13.7; -12.6; -13.2; -15.0; -12.3). 10 core and 9 rim analyses; published mean -14.3 ‰. Quartz-tourmaline veins near the Korvilansuo-Kivisuo deposit; Fe3+-rich tourmaline. | Molnár et al. (2016), Boron, sulphur and copper isotope systematics in the orogenic gold … |
δ34S in ‰ (per mil) Values of the same system
Standard : V-CDT
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 1.7 ± 1.1 ‰ | −0.4 / 8.5 ‰ | 18 | pyrite of the tonalite Mean and standard deviation recalculated from the means of 2 samples (KN13331 +2.4 (n = 9); KN13332 +0.9 (n = 9)), i.e. 18 spot analyses from -0.4 to +8.5 ‰. | Molnár et al. (2016), Boron, sulphur and copper isotope systematics in the orogenic gold … |
| 1 ± 0.7 ‰ | 0.2 / 2.1 ‰ | 7 | pyrrhotite of the tonalite Published mean and standard deviation of 7 spot analyses (sample KN10158), +0.2 to +2.1 ‰. | Molnár et al. (2016), Boron, sulphur and copper isotope systematics in the orogenic gold … |
| −1.7 ± 2.4 ‰ | −4.3 / 0.4 ‰ | 14 | chalcopyrite of the tonalite Mean and standard deviation recalculated from the means of 2 samples (KN13331 -3.4 (n = 5); KN10158 0.0 (n = 9)), i.e. 14 spot analyses from -4.3 to +0.4 ‰. | Molnár et al. (2016), Boron, sulphur and copper isotope systematics in the orogenic gold … |
δ65Cu in ‰ (per mil) Values of the same system
Standard : NIST SRM 976
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.6 ± 0.3 ‰ | −0.06 / 1.04 ‰ | 15 | chalcopyrite of the tonalite (KN13331, KN10158) Mean and standard deviation recalculated from 15 analyses, -0.06 to +1.04 (+0.67; +0.62; +0.36; +0.78; +0.65; +0.65; +0.86; +1.02; +1.04; +0.15; +0.42; +0.49; +0.58; +0.78; -0.06). Positive values mostly in felsic intrusive rocks, negative in metasediments; no correlation with δ34S according to the authors. | Molnár et al. (2016), Boron, sulphur and copper isotope systematics in the orogenic gold … |
Deposits of the same type
- Muruntau Uzbekistan
- Kalgoorlie (Golden Mile) Australia
- Victorian Goldfields Australia
- Ashanti (Obuasi) Ghana
- Loulo (district de Gara-Yalea) Mali
- Gounkoto Mali
- Massawa Senegal
- Kirkland Lake (Macassa mine) Canada
Cite this page
IsoFind Atlas (2026). Kuittila (Hattu schist belt), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/kuittila-ceinture-de-hattu/ (accessed 2026-10-19).
@misc{isofind2026kuittilahattuschistbeltisotop,
title = {Kuittila (Hattu schist belt), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/kuittila-ceinture-de-hattu/},
note = {Accessed 2026-10-19}
}Updated : 2026-10-19