The Chinese translation is being made; the original is shown for now.
Simplicity is at the heart of Ark Mines’ (ASX: AHK) pitch for its Sandy Mitchell rare earths and heavy minerals project in Far North Queensland, where a conventional mineral sands operation could underpin a 26-year mine life and an estimated post-tax net present value (NPV) of $883 million.
An updated scoping study has outlined a 13 million tonnes per annum (Mtpa) operation with relatively straightforward mining and processing requirements, positioning the project as a potential long-life producer of rare earths and industrial minerals.
For Ark managing director Ben Emery, the appeal lies in the project’s uncomplicated mining characteristics.
“This is simple sand mining. The ore is free-dig from surface, with no drilling or blasting, and tailings go back into the mined area so the land can be progressively rehabilitated,” Emery said.
“That gives us a low operating cost of A$8.31 per tonne of ore.”
The study, prepared by MEC Mining with input from IHC Mining and Mineral Technologies, proposes dozer-push mining feeding two mobile mining units, followed by wet concentration, flotation and mineral separation.
The operation would process approximately 313.8 million tonnes of ore over its proposed mine life, producing rare earth concentrates alongside garnet, zircon, mica and titanium minerals.
Simplicity underpins the economics
Ark’s scoping study estimates a post-tax internal rate of return (IRR) of 29.7 per cent and payback of pre-production capital within 3.5 years of first production.
Initial capital expenditure is estimated at $383.6 million, including a 25 per cent contingency.
Average annual revenue is forecast at approximately $348 million, with an operating surplus of $189 million after royalties and freight.
Over the proposed 26-year mine life, the project could generate $8.39 billion in revenue and $4.56 billion in operating surplus.
Importantly, Sandy Mitchell’s projected revenue is not solely dependent on rare earths.
Garnet accounts for approximately 52 per cent of forecast life-of-mine revenue, or around $181 million annually, followed by monazite at 22 per cent, with additional contributions from biotite, muscovite, zircon, xenotime and titanium minerals.
The importance of garnet to Sandy Mitchell’s economics comes against a backdrop of projected growth in the global industrial garnet market.
According to Fortune Business Insights, the market was valued at $US782.43 million in 2025 and is forecast to grow from $US821.37 million in 2026 to $US1.21 billion by 2034, representing compound annual growth of 4.98 per cent.
Asia-Pacific accounted for 38 per cent of global industrial garnet revenue in 2025, making it the largest regional market.
Industrial garnet is used in abrasive blasting, waterjet cutting, surface preparation and water filtration, with demand supported by manufacturing, infrastructure development and industrial applications.
The projections provide a broader demand context for Sandy Mitchell’s proposed garnet production, although the project’s commercial success will depend on product qualification, securing customers and achieving the study’s assumed selling prices.
The study is supported by a mineral resource estimate refined to 373.3 million tonnes grading 5420 parts per million monazite equivalent.
Approximately 97 per cent of the production target is based on Measured and Indicated resources, with the remaining 3 per cent classified as Inferred.
From study to development
Ark has secured Queensland Government support, including a $4.5 million investment through the Queensland Critical Minerals and Battery Technology Fund and the granting of mining lease ML100409 in March 2026.
However, translating the project’s relatively simple mining concept into a commercial operation will require further technical work and substantial capital.
Development funding has not been committed, with Ark considering project debt, offtake-linked financing and equity.
The company has held discussions with potential buyers of rare earth concentrates, garnet and mica products, although no binding offtake agreements have been reached.
The next development phase will involve a pre-feasibility study, preparation of a JORC Ore Reserve and approximately 37,000 tonnes of bulk sampling from four test pits.
Further metallurgical testing and product qualification with prospective customers will be central to validating the proposed processing flowsheet and revenue assumptions.
Read more: Queensland tackles a common yet critical problem
Subscribe to Australian Resources & Investment and receive the latest news on commodity prices, resource developments, executive movements and more.
The post ‘Simple sand mining’: Ark outlines $883m rare earths opportunity appeared first on Australian Resources & Investment.