The Iron Bridge mineralisation lies within the Pincunah Member of the Soanesville Group, which is part of the Pilbara Super Group in the East Pilbara Terrane.

Regionally the rock sequence is dominated by mafic to andesitic volcanics and volcaniclastics, BIF’s and terrigenous clastic sequences intruded by Archaean granitoids. In the project area the rocks have been tightly folded, having a general strike of north-south with a steep sub-vertical dip.

The Pincunah Member forms an overturned north-south striking ridge through the North Star area of the deposit, dipping steeply to the west. Several vertical faults have been interpreted to rotate the Pincunah Member to north-west, parallel to the Mount Yule Granite complex in the north-west region of the project area.

Iron mineralisation at Iron Bridge occurs primarily within the Pincunah Member which outcrops across the entire project tenement. It is often masked by cemented caps of ferruginous weathered BIF, silcrete and detritus. A surficial weathered zone forms in upper (20–60 m) horizons dominated by maghemite and kenomagnetite, hematite and goethite after magnetite.

The hanging wall of the Pincunah Member is the Kangaroo Caves Formation and is composed of BIF bands interlayered with laminated, micro to mesobanded shales and chert. BIF units are up to 15 m in thickness and occur most commonly immediately adjacent to the Pincunah Member contact, while the remainder of the formation ........

FMG Iron Bridge (Aust) Ltd. proposes to mine using conventional open pit mining methods which consist of drill and blast followed by load and haul. The North Star Extension indicative pit footprint will include two pits; Glacier Valley North (GVN) and Glacier Valley South (GVS), with an estimated maximum pit depth of ~370 m.

Magnetite concentrate product will be transported through a slurry pipeline between Iron Bridge and Port Hedland.

The ore bodies planned to be mined are bulk deposits and while some ore loss and dilution may occur along the edges, this edge dilution is accounted for in the regularisation process.

Ore mined from the designated pits will be either fed directly to the Proposed Amendment crusher hoppers for the Ore Processing Facility (OPF) or stockpiled on the run-of-mine (ROM) pads, or other long-term stockpiles.

Ore stockpiles and waste dumps are located to the east and west of the mine and make use of natural valleys to store the life of mine (LOM) volumes.

- subscription is required.

Operation of the large scale pilot and full-scale demonstration plants between 2015 and 2018. The pilot plant verified the wet magnetite processing flowsheet in close collaboration. The demonstration plant proved the metallurgical and cost benefits of early waste rejection by using full scale dry processing equipment commonly seen in other industries.

The combined plants processed one million tonnes of magnetite ore over a 12-month period to produce a 67% iron, low impurity concentrate product. Extensive data was collected to support the design of the full-scale 22 wmtpa OPF.

Stage 2 development of the Project includes:
• 22 wmtpa OPF
• Airstrip and expanded village
• 195km Canning Basin water pipeline
• 135km concentrate pipeline to Fortescue’s Herb Elliot Port facility in Port Hedland and return process water pipeline
• Port handling facilities including concentrate dewatering, covered storage and reclaiming/conveying to existing port o ........