Onslow Iron

Project Logistics & B2B Overview

Geographic Location and Topography

The Onslow Camp Dune Stage is situated within the Ashburton Mineral Field, Pilbara region, Western Australia — one of the continent's most hyper-arid inland corridors. The terrain is characterised by stabilised coastal dune systems and alluvial flats with extreme thermal variance (surface temps exceeding 55°C). Proximity to the Ashburton River delta introduces episodic flood risk. Operational water sourcing relies on engineered borefield networks, as no perennial surface supply exists within viable haulage distance.

B2B Lifecycle and Operational Framework

Currently classified as Operating, this site functions as a construction materials extraction node feeding civil and camp infrastructure demands of the broader Onslow Iron project. MinRes holds 100% of mining services and infrastructure, with RHIJV partners (Baowu, AMCI, POSCO) holding equity in the upstream iron ore asset. Workforce deployment follows:

• FIFO rotational rosters via Onslow Airport (ONL)
• Camp soporte vital managed under MinRes's integrated camp services division
• Procurement cycles aligned with MinRes's centralised vendor framework
• Operational tempo dictated by Onslow Iron's construction milestone schedule

Engineering and Extraction Infrastructure

As a construction materials operation, the primary extraction circuit involves mechanical dune stripping, screening, and grading — not conventional hard-rock comminution. Key engineering parameters include:

• Mobile screening plants for granulometric classification of dune sand
• Compaction and stabilisation testing to civil engineering specifications
• Dust suppression systems critical under Pilbara high-wind regimes
• Haul road construction material supply integrated into camp pad and laydown area development

No flotation or primary grinding circuits are applicable to this materials classification.

ESG, Value Chain and Sustainability

MinRes operates under a proactive rehabilitation mandate consistent with WA DMP/DMIRS requirements. For dune extraction, this entails:

• Progressive landform rehabilitation post-extraction to restore aeolian stability
• Topsoil stockpiling and native seed bank preservation protocols
• No tailings facility applicable — waste profile limited to overburden and reject fines
• Biodiversity offset obligations under Onslow Iron's consolidated Environmental Management Plan
• Water consumption reporting aligned with MinRes's group-level ESG disclosure framework