The Northern Norrbotten Ore Province is the type area for iron deposits of Kiruna-type (apatite iron ores). These deposits are mainly hosted by 1.9 Ga Svecofennian porphyries and occur as massive lenses or as breccia style of mineralisation in the Kiruna and Malmberget regions. Just outside this area an unusual type of apatite iron ore occur at Narken. Euhedral crystals of hematite altered magnetite, apatite, and pyrite occur as breccia infill together with tabular hematite, epidote, chlorite and some quartz. The occurrences of iron oxide mineralization are enriched in REE, and contain up to 0.5% Cu but are low in Au. The wall rocks and clasts of these rocks within the breccia bodies are strongly altered by silicification, epidotization and chloritization. Sulphur isotope data and mineral paragenesis indicate increasingly oxidizing conditions during development of the mineralization. Magnetite, apatite and pyrite are early formed minerals, transported to higher levels in the crust by a fluidized hydrothermal system and deposited in breccia bodies where they occur in a xenocrystic manner in a breccia infill of flaky hematite, epidote, chlorite, quartz and minor chalcopyrite. In many respects the Narken deposits are transitional in character to apatite iron ores and IOCG-style mineralization.