
Iron formationhosted iron ores in the Hamersley Province ...
Nov 29, 2013· AbstractIron formationhosted iron ore deposits account for the majority of current world iron ore production and consist of three classes: unenriched primary iron formation with typically 25 to 45 wt%Fe; martite–goethite ore formed by supergene processes, with abundant hydrous iron oxides containing 60 to 63 wt%Fe; highgrade hematite ores thought to be of hypogene or metamorphic .