The Project is situated within the Neoarchaean-Palaeoproterozoic Hamersley Basin and forms part of the West Pilbara Mineral Field.

The Hamersley Group contains five major banded iron formation (BIF) units, of which two, the Marra Mamba Iron Formation and the Brockman Iron Formation, host iron mineralisation, including most of the exploited iron ore deposits in the Pilbara Mineral Province.

There is relatively poor outcrop in the Project area. In the east alluvial/channel iron deposit (CID) cover forms a well preserved Hamersley Surface – i.e. laterite cover, and to the west more Marra Mamba Iron Formation (MMIF) outcrops. From examination of the present NMM drill and gamma logs - and with some confirmation during a limited ground examination during a brief site visit - the full sequence of MMIF appears to be present (i.e. Nammuldi Member to Mt Newman Member, together with some West Angela Member of the overlying Wittenoom Formation (Pearcey & Sergeev 2012, Slater & Kneeshaw 2012). The high grade mineralisation typically occurs within the Mt Newman Member.

Iron mineralisation of the martite-goethite (M-G) type within the Marra Mamba Iron Formation usually occurs preferentially within the Mount Newman Member only. However, enrichment can extend into the MacLeod Member and on occasion into the Nammuldi Member. The in situ ore forming process is a combination of the metasomatic, pseudomorphic replacement of magnetite (resulting in martite - M), th ........

Wonmunna is an open pit mine used conventional truck and shovel mining method with drill and blast, located 80km north-west of Newman in the Pilbara region, Western Australia. On 22 March 2021, Mineral Resources Limited announced first iron ore production from Wonmunna Iron Ore Mine. Acorrding to the Mining Proposal 2015 the planned Wonmunna mining operation is to mine three deposits: - North Marra Mamba (NMM) (two main pit areas with five pits on the East and one pit on the West of the Weeli Wolli Exclusion Zone), - Central Marra Mamba (CMM) (one pit) and - South Marra Mamba (SMM) (two pits). The provided pits will have the following parameters: Depth - 50m maximum Batter height - 20m Berm width - 5m Ramp gradient - 1:10 Ramp Width - 25m dual (20m single) Bench height - 6m Batter angle - 65 Stack berm width - 5m Overall wall angle - 45 Wonmunna ore to blend with Iron Valley and the proposed Lamb Creek and Wedge mines creating Utah Point Hub.

Acorrding to the Mining Proposal 2015 Ore will be crushed and screened to a minus 8mm product size. This will be undertaken using a modular crushing and screening facility to process up to 5 Mtpa over the mine life. Mobile dry processing plant will require a low pad of 5m to be built with overburden from pre-stripping of the nearby NMM-west pit. Water will be added in the process and on the stockpile to mitigate dust generation.