• The Mesa B, C, and H deposits are Channel Iron Deposits (CID).
• The deposits are a part of a series of flat topped hills, defining the paleochannel of the Robe River. They consist of pisolite infilling the paleochannel, which cuts across the Cretaceous to Proterozoic stratigraphy.
• Mineralisation is confined to the Tertiary Pisolite.
• A hydrated hardcap overlies the mineralised pisolite.
• Non-mineralised clay layers and pods have been domained separately.

Mesa A is Iron Ore Mining Projec (Mesa A, B and C deposits) approximately 43 km west of Pannawonica in the Pilbara region of Western Australia .

The Mesa J Hub includes Mesa H, Mesa J and Mesa K deposits, and is located 14km southwest of the Pannawonica.

Iron ore is mined using conventional open cut mining methods of drilling and blasting, and load and haul. Waste rock is hauled to designated waste dumps or to back fill unused pits, with a priority to store in unused pits.

Mesa B and C ore will be processed through a planned new wet processing facility located at the existing Mesa A site. The Mesa A wet processing plant will scrub and screen the ore to produce a washed coarse ore product. The wet processing facility will be a modification of the existing Mesa A process plant and is due to be commissioned in 2021.

Mesa H ore will be processed through the existing dry and wet processing facilities at the Mesa J site, which will be modified with the increase of ore coming from the Mesa J hub. A new screening plant is to be installed to reduce the cut point to -0.5 mm cut point, compared to the existing -1 mm cut point. This ore will be combined with dry processed ore before being railed to Cape Lambert.

The product will be railed to Cape Lambert to generate a lump and fines product. Conversion of railed products to shipped products is based on the results of test work that estimates the conversion during rail and port handling process.