Palokas (Rompas-Rajapalot gold system)

Finnish Lapland, Peräpohja Belt, Finland

Other hydrothermalAu (Co)

Type: Gold in sulphide- and tourmaline-rich metasomatized rocks

Recently discovered gold mineralization of the Rompas-Rajapalot system (Mawson Resources exploration), in altered cordierite-anthophyllite quartzites and amphibolites; tourmaline as crystals in the host rock (type 1) and in tourmaline-sulphide veins or breccias (type 2). Vein molybdenite dated at 1.78 ± 0.01 Ga (Re-Os). Ranta et al. (2017): δ11B from 0 to -4 ‰ like the nearby tourmaline granite (1.78 Ga), single magmatic-hydrothermal event.

δ11B in ‰ (per mil) Values of the same system

Standard : NIST SRM 951

Value	Range	n	Mineral or matrix	Source
−2.3 ± 1.23 ‰	−4.45 / 1.02 ‰	43	tourmaline of the mineralized host rock, cut by anthophyllite (type 1) Mean and standard deviation recalculated from 43 analyses, -4.45 to +1.02 (OY26382 G1-Core -2.88; OY26382 G1-Core-2 -1.18; OY26382 G1-Rim -1.78; OY26382 G1-Rim-2 -1.74; OY26382 G2-Core -3.84; OY26382 G2-Core-2 -2.51; OY26382 G2-Rim -1.67; OY26382 G2-Rim-2 -1.34; OY26382 G3-Core -2.71; OY26382 G3-Rim -3.77; OY26382 G4-Core -2.18; OY26382 G4-Rim -2.25; OY26382 G5-Core -1.67; OY26382 G5-Core-2 -1.07; OY26382 G6-Core -2.97; OY26382 G7-Rim -2.60; OY26382 G7-Core -2.40; OY26382 G8-Core -2.37; OY26380 G1-Core -2.25; OY26380 G1-Rim -3.31; OY26380 G2-Core -2.11; OY26380 G2-Rim -3.48; OY26380 G3-Core -3.40; OY26380 G3-Core2 -3.12; OY26380 G3-Rim1 -2.57; OY26380 G3-Rim2 -2.02; OY26380 G4-Core -4.08; OY26380 G4-Rim -2.65; OY26380 G5-Core -3.61; OY26380 G6-Core -1.32; OY26380 G6-Rim -2.20; OY26380 G7-Core +0.23; OY26380 G7-Core2 +0.05; OY26380 G7-Core-b +1.02; OY26380 G7-Rim -0.98; OY26380 G3-Core -3.76; OY26380 G3-Core-2b -3.33; OY26380 G3-Rim-1b -2.91; OY26380 G3-Rim-2b -1.88; OY26380 G7-Core-c -0.34; OY26380 G7-Core-2b -1.11; OY26380 G8-Core -4.45; OY26380 G9-Core -4.27). Grain G7 of OY26380 keeps three positive values (+0.23, +0.05 and +1.02 ‰) in the supplement, whereas the text says the only positive value was discarded; the label G3-Core appears twice there. The per-zone means of Table 2 of the article (OY26382 cores -2.27, rims -2.29; OY26380 cores -2.31, rims -2.27) are not exactly reproduced from these values.	Ranta et al. (2017), Source of boron in the Palokas gold deposit, northern Finland: evide…
−3.98 ± 0.32 ‰	−4.46 / −3.48 ‰	8	tourmaline of tourmaline-sulphide veins and breccias (type 2, OY26381) Mean and standard deviation recalculated from 8 analyses, -4.46 to -3.48 (G3-Core -4.46; G4-Core -3.77; G5-Core -4.11; G6-Core -3.89; G6-Rim -4.18; G7-Core -3.70; G8-Core -4.24; G8-Rim -3.48). Table 2 of the article: cores -4.05 ± 0.28 (n = 6), rims -3.9 ± 0.37 (n = 2).	Ranta et al. (2017), Source of boron in the Palokas gold deposit, northern Finland: evide…

Deposits of the same type

Pezinok Slovakia
Allchar North Macedonia
Mount Cer Serbia
Sardinia (argentiferous galenas) Italy
Almadén Spain
Wanshan China
Xunyang China
Suii Japan

Cite this page

IsoFind Atlas (2026). Palokas (Rompas-Rajapalot gold system), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/palokas-systeme-aurifere-de-rompas-rajapalot/ (accessed 2026-10-20).

@misc{isofind2026palokasrompasrajapalotgoldsys,
  title = {Palokas (Rompas-Rajapalot gold system), isotope signatures},
  author = {{IsoFind Atlas}},
  year = {2026},
  url = {https://www.isofind.tech/isotopes/en/deposits/palokas-systeme-aurifere-de-rompas-rajapalot/},
  note = {Accessed 2026-10-20}
}

Updated : 2026-10-20