Castanha
Carajás Mineral Province, Pará, Brazil
IOCGCu-Au (Ni, Co)
- Type
- Iron oxide-copper-gold (IOCG) with nickel and cobalt
Carajás Mineral Province, Itacaiúnas Shear Belt, southern segment, near Canaã dos Carajás; same family as Sossego. Hosted by subvolcanic and volcanic rhyodacites (about 2.75 Ga) and gabbros. Early sodic alteration, then calcic-iron (actinolite-magnetite) and potassic (biotite) alteration; chalcopyrite-pyrrhotite-pyrite-cobaltpentlandite breccias. Magmatic fluid (water δ18O +9.5 to +5.2 ‰ between 500 and 400 °C); calcite fluids near 400 °C: δ13C -2.8 to -1.5 ‰. Indicative coordinates.
δ34S in ‰ (per mil) Values of the same system
Standard : V-CDT
| Value | Range | n | Mineral or matrix | Source |
|---|---|---|---|---|
| 0.1 / 3 ‰ | mineralised-zone sulphides (chalcopyrite and pyrrhotite) magmatic sulphur, as at Bacuri, Visconde, Pedra Branca and Cristalino. | Pestilho et al. (2020), Stable isotopes and fluid inclusion constraints on the fluid evol… |
Deposits of the same type
- Bacaba Brazil
- Alvo 118 Brazil
- El Laco Chile
- Candelaria-Punta del Cobre district Chile
- Grängesberg and Blötberget Sweden
- Kiirunavaara (Kiruna) Sweden
- Gruvberget (Svappavaara) Sweden
- Kevus (Lannavaara) Sweden
Cite this page
IsoFind Atlas (2026). Castanha, isotope signatures. https://www.isofind.tech/isotopes/en/deposits/castanha/ (accessed 2026-10-13).
@misc{isofind2026castanhaisotopesignatures,
title = {Castanha, isotope signatures},
author = {{IsoFind Atlas}},
year = {2026},
url = {https://www.isofind.tech/isotopes/en/deposits/castanha/},
note = {Accessed 2026-10-13}
}Updated : 2026-10-13