Evidence of multiple halogen sources in scapolites from iron oxide-copper-gold (IOCG) deposits and regional NaCl metasomatic alteration, Norrbotten County, Sweden

Overall, the data in this study suggest that halogens in early scapolites were derived from residual brines and halite, during metamorphism of evaporites linked to the RM alteration. Later in the history of the Norrbotten district components of the RM alteration were recycled and mixed during magmatic and local metasomatic events to varying extents, resulting in the brines associated with IOCG alteration.