Key Highlights

  • The assessment projects a $2.53 billion increase in real Queensland Gross State Product over the 25-year mine life.
  • Up to 214 construction jobs and 128 direct operational roles are forecast, with a 50% Indigenous employment target.
  • Estimated life-of-mine contributions total $305 million in state royalties and Native Title payments, plus $2.1 billion in company income tax.
  • Construction is scheduled to commence in Q4 2028 under the updated development timeframe.

Diatreme Resources Limited (ASX:DRX) has released the results of an Economic Impact Assessment for its Northern Silica Project in Far North Queensland, in an announcement dated 4 November 2026. The assessment was commissioned by the company, completed by external consultants KPMG and forms part of the project's environmental impact statement.

Projected Economic Contribution

The assessment projects that real Queensland Gross State Product would rise by $2.53 billion during operations, and that real household consumption in the state would increase by $729 million over the 25-year mine life. These are modelled projections rather than confirmed outcomes.

The estimates draw on the project's pre-feasibility study, released on 15 October 2026, and reflect updated development timeframes, a shared-use port arrangement and revised environmental management and emissions costs.

Demand for the company's product is presented alongside the power and delivery requirements, with the release noting that the project's operating costs include updated environmental management and emissions measures. Those inputs shape the economic results that the assessment reports.

Employment and Benefit Sharing

The project is forecast to create up to 214 jobs during construction and 128 direct operational roles across its life. The company has set a target for 50% Indigenous employment.

Traditional Owners are expected to gain employment and Business participation opportunities, along with further benefit-sharing from the project. The assessment cites Queensland royalties and Native Title payments of $305 million over the life of the mine.

The release highlights that Traditional Owners are expected to share in the project through employment, business participation and benefit-sharing arrangements. The company presents these elements as part of the project's broader community contribution.

Infrastructure and Approval Pathway

The preferred delivery model involves shared use of the existing wharf and shiploading infrastructure at the Port of Cape Flattery, rather than a standalone facility. The company says this approach is reflected in the assessment's cost basis.

The Northern Silica Project is being assessed under the bilateral process between the Queensland and Australian governments. The announcement does not indicate when approvals are expected to be finalised.

The project's approval path runs through the bilateral process, and the announcement does not set out a timetable for that decision. The updated development schedule is the reference point for the project's expected start.

Project Scale and Timeline

The project is described as having a 25-year mine life, with construction timing set for late 2028 under the updated plan. The assessment figures apply across that period and are stated in real terms, which means they are adjusted for inflation. The release also notes that the project is part of a wider effort to develop critical minerals in Queensland, and it refers to the broader role of silica sand in Solar Energy Supply chains without quantifying that market.

Final Word

The assessment quantifies the potential economic contribution of the project to Queensland, the Cape York region and the Hope Vale and Cooktown communities. The figures are projections that depend on the environmental assessment process, the updated construction timeline of late 2028 and the delivery model described. The release does not set out a final approval or a financing decision, so the outcomes it describes remain conditional.