PorterGeo Database
The most significant iron ore deposits are developed within the Pincunah Banded-iron Member at the top of the 3.25 to 3.24 Ga Sulphur Springs Group (e.g., the primary magnetite North Star and Glacier Valley deposits of the Iron Bridge Project - 5.205 Gt @ 30.4% Fe) and the extensive Nimingarra iron formation near the base of the 3.05 to 3.02 Ga ...