Arrow Minerals Applies for 415sqkm Pilbara Tenement Next to Rio Tinto’s Robe Mine
Key Takeaways
- Arrow Minerals has lodged a first-in-time application for a new Pilbara tenement immediately adjacent to Rio Tinto's Robe JV Operations, expanding its total prospective land holding by 30% to 415sqkm.
- The new tenement sits as close as 2km from the Robe Valley Mesa A mining hub, which currently produces between 20 and 23 million tonnes per annum and has operated since the early 1970s.
- CID targets on the new tenement were previously identified by past explorer CZR Resources in 2014, and the ground is considered prospective for Robe-style channel iron deposit mineralisation.
- Exploration cannot commence until tenure is formally awarded — the application is lodged but the tenement has not yet been granted.
- Arrow also holds a 185Mt bauxite resource in Guinea and an iron ore project at Simandou North, though the Simandou project remains subject to a Guinea Government review with uncertain timing.
Arrow Minerals lodges first-in-time application for Pilbara tenement adjacent to Rio Tinto’s Robe JV
Arrow Minerals Limited (ASX: AMD) has lodged a first-in-time application for a new iron ore exploration tenement immediately adjacent to Rio Tinto’s Robe JV Operations in the Pilbara, Western Australia. The application directly adjoins Arrow’s existing Yarraloola tenements and increases the company’s prospective land holding by 30% to 415sqkm.
The new tenement sits as close as 2km from a large-scale open pit mine that is part of the Robe Valley Mesa A mining Hub, currently producing between 20 and 23 million tonnes per annum (mtpa) and operating since the early 1970s.
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What are channel iron deposits (CID) and why do they matter?
Channel iron deposits, or CIDs, are a type of iron ore mineralisation that formed in ancient river channels. Over millions of years, iron-rich sediments accumulated and hardened within these channels, producing flat, near-surface ore bodies that are relatively straightforward to mine.
What makes CIDs attractive to investors comes down to two characteristics that Arrow’s Managing Director David Flanagan highlighted directly. First, they typically have favourable deposit geometry, meaning the ore sits close to the surface in consistent, easy-to-access layers. This translates to lower strip ratios (less waste rock removed per tonne of ore), which reduces mining costs. Second, CIDs commonly carry low impurities, which means less processing is required before the ore is saleable, supporting higher margins.
Rio Tinto’s Robe JV is the real-world proof of what CID mineralisation can become at scale. Arrow’s new tenement is considered prospective for “Robe style CID mineralisation,” with CID targets previously identified by past explorer CZR Resources in 2014 shown on the tenement map (Figure 1, as reproduced from the ASX announcement).
A strategic land position taking shape in the Pilbara
This application is not a standalone move. It reflects a deliberate strategy of accumulating ground around proven CID mineralisation in one of the world’s most established iron ore corridors.
The new tenement directly adjoins Arrow’s existing Yarraloola tenements, consolidating the company’s footprint into a contiguous holding of 415sqkm. For context on the value others place on this corridor, the Robe River JV permits were acquired from CZR Resources for $75 million in 2025, though Arrow has made no claim that its tenements carry equivalent value.
Key attributes of Arrow’s current Pilbara position include:
- Total prospective land holding of 415sqkm following this application
- New tenement immediately adjacent to the Rio Tinto Robe JV Mining Lease
- Target mineralisation: Robe style CID
- Proximity to active road and rail infrastructure visible on the tenure map
- Tenure award required before exploration can commence
Managing Director David Flanagan
“Our team is well aware of the tonnage and cashflow-generating potential of channel iron deposits, such as those in this part of the Pilbara. As proven by Rio, they often have very favourable deposit geometry and low impurities, meaning they can be low-cost high-profit operations. Our team knows this because we have mined them in the past.
“The Company considers the tenement is prospective for iron ore. The tenement immediately adjoins operations run by Rio Tinto as part of the Robe JV that have significantly contributed to them and their JV partners becoming among the world’s most profitable companies. This new tenement application may host Robe style CID mineralisation and we certainly plan to actively explore the area, subject to tenure award, as we seek to build a significant iron ore business.”
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What’s next for Arrow Minerals
Exploration on the newly applied-for tenement is subject to tenure award. Until that award is confirmed, Arrow cannot commence any ground activity on the new ground.
Beyond the Pilbara, Arrow is advancing two projects in Guinea that provide longer-term optionality for investors. The Niagara Bauxite Project holds a Maiden Mineral Resource of 185Mt at 42.3% Al2O3 and 2.7% SiO2, as estimated by SRK Consulting (UK) Ltd. The Simandou North Iron Ore Project remains subject to a review by the Guinea Government, with the outcome and timing described as uncertain in the announcement.
The Pilbara remains the near-term active front, where Arrow is systematically building toward its stated ambition of developing a significant iron ore business.
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