Marjajärvi (Marjarova)
Norrbotten (Pajala), Sweden
Banded iron formationsFe
- Type
- Quartz-banded iron ore
Layered magnetite-skarn quartzite, in a garnet phyllite with quartzitic layers, graphitic phyllites and dolomitic limestones. Volcano-sedimentary iron ore of the Lapponian Greenstone group (2.0 to 2.5 Ga), metamorphosed during the Svecokarelian orogeny. The widely scattered δ34S and disequilibrium between sulfides indicate bacterial reduction of seawater sulfate. Coordinates read on the map of the publication (Fig. 2), about twenty kilometres west of Pajala; precision of about 10 km.
δ34S in ‰ (per mil) Values of the same system
Standard : V-CDT
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 8.8 ± 9.2 ‰ | −7.8 / 23.5 ‰ | 12 | pyrrhotite, pyrite and chalcopyrite of the iron ore Mean and standard deviation recalculated from 12 analyses, Table 1. Low values in the north (+0.2 to +9.4 ‰), high in the centre (+11.9 to +23.5 ‰). | Frietsch et al. (1995), Sulphur isotopes in Lower Proterozoic iron and sulphide ores in n… |
| 11.2 ± 9.2 ‰ | −0.8 / 28.3 ‰ | 15 | pyrrhotite, pyrite and chalcopyrite of the quartzite Mean and standard deviation recalculated from 15 analyses, Table 1. | Frietsch et al. (1995), Sulphur isotopes in Lower Proterozoic iron and sulphide ores in n… |
| 1.2 ± 3.4 ‰ | −8.2 / 5.6 ‰ | 12 | pyrrhotite and pyrite of phyllites (including graphitic) Mean and standard deviation recalculated from 12 analyses, Table 1. | Frietsch et al. (1995), Sulphur isotopes in Lower Proterozoic iron and sulphide ores in n… |
Deposits of the same type
- Isovaara (Masugnsbyn field) Sweden
- Isua (BIF) Greenland
- Jingshansi (Wuyang) China
- Carajás Brazil
- Qidashan China
- Gongchangling China
- Iron Quadrangle, high-grade hematite ores (eastern region) Brazil
- Cauê Formation (Quadrilátero Ferrífero) Brazil
Cite this page
IsoFind Atlas (2026). Marjajärvi (Marjarova), isotope signatures. https://www.isofind.tech/isotopes/en/deposits/marjajarvi-marjarova/ (accessed 2026-10-13).
@misc{isofind2026marjajarvimarjarovaisotopesig,
title = {Marjajärvi (Marjarova), isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/marjajarvi-marjarova/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13