Riukka
Tammela, Häme Belt (Forssa Group), Finland
Orogenic goldAu
- Type
- Orogenic gold in quartz-tourmaline veins
Gold prospect in shear zones cutting intermediate to mafic metavolcanic rocks (lower amphibolite facies), narrow zones up to 35.5 g/t over 1 m; gold mainly in quartz-tourmaline veins, mineralization or remobilization around 1830 to 1800 Ma. Talikka and Vuori (2010): arsenopyrite-bearing tourmaline from -13.5 to -9.4 ‰.
δ11B in ‰ (per mil) Values of the same system
Standard : NIST SRM 951
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| −11.6 ± 1.8 ‰ | −13.5 / −9.4 ‰ | 4 | massive tourmaline of an arsenopyrite-bearing quartz-tourmaline vein (dravite) Mean and standard deviation recalculated from 4 analyses, -13.5 to -9.4 (T5 -9.4; T5 -10.8; T5 -12.5; T5 -13.5). Widest range of the vein samples. | Talikka & Vuori (2010), Geochemical and boron isotopic compositions of tourmalines from s… |
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). Riukka, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/riukka/ (accessed 2026-10-20).
@misc{isofind2026riukkaisotopesignatures,
title = {Riukka, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/riukka/},
note = {Accessed 2026-10-20}
}Updated : 2026-10-20