Sulphur Springs

Sulphur Springs Mine Portal is situated near Marble Bar, Pilbara Region, Western Australia — statistically one of the hottest inhabited zones on Earth, with ambient temperatures routinely exceeding 45°C. The terrain is characterised by rugged Archaean greenstone belts, imposing significant mechanical stress on surface infrastructure. Thermal management of diesel-powered heavy equipment is a non-negotiable operational priority. Underground workings provide partial thermal relief, but portal-level infrastructure and haul roads demand rigorous heat-load engineering protocols year-round.

Currently classified as Operating under Develop Global Limited (ASX: DVP), which assumed full operational control on 27 February 2025 following the transition from Venturex Resources Limited. The site represents a critical polymetallic asset within DVP's portfolio. For B2B vendors and contractors, the site's remote location — approximately 200 km southeast of Port Hedland — creates an acute dependency on local and regional mechanical workshops. Unplanned equipment downtime carries severe cost penalties; proximity-based service agreements are strategically essential for any supplier seeking preferred-vendor status.

The Sulphur Springs deposit is a Volcanogenic Massive Sulphide (VMS) system requiring a multi-stage processing circuit. Key engineering components include:

• Primary crushing and SAG/ball mill grinding circuit for sulphide ore liberation
• Selective differential flotation plant producing separate Cu, Pb, and Zn concentrates
• High reagent-demand environment (xanthates, frothers, pH modifiers) requiring precise dosing control
• Thickener and filter circuits for concentrate dewatering
• Cooling systems for mill bearings and flotation cells under extreme ambient thermal loads

Physico-chemical process stability is the primary engineering challenge at this latitude.

Develop Global operates under Western Australia's stringent Mining Rehabilitation Fund (MRF) obligations. Sulphur Springs' ESG framework centres on:

• Engineered Tailings Storage Facility (TSF) with lined containment and leachate monitoring
• Progressive rehabilitation of disturbed landforms concurrent with active mining
• Acid Rock Drainage (ARD) risk management — critical given the sulphide-rich ore body
• Water recycling from TSF decant to reduce freshwater extraction from the Pilbara catchment
• Biodiversity offset commitments aligned with EPBC Act requirements

Proactive closure planning is embedded in the project's DFS documentation, reflecting investor ESG scrutiny at ASX level.