CASTILE RESOURCES Rover 1 and regional exploration
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→ Rover Project
The 100%-owned Rover Project covers a significant proportion of the Rover Mineral Field. The flagship Rover 1 deposit anchors the district, with defined resources at Explorer 108 and Explorer 142 and more than 40 targets still to be fully tested.
Rover 1 at a glance
June 2026 study
Base case
Five revenue streams
Up from 500 ktpa in the 2022 PFS
Source: Rover 1 Updated Pre-Feasibility Study and Bismuth Scoping Study, ASX:CST, June 2026 · Mineral Resource update, ASX:CST, 20 October 2025.
Location
The Rover Project sits near the Tennant Creek commercial airport, the Adelaide-Darwin railway, the Stuart Highway and the Amadeus natural gas pipeline. That infrastructure advantage remains central to the development case at Rover 1.
Opportunity
The main mineralisation style is IOCG, a deposit type known to host large-scale economic copper and gold mineralisation such as Olympic Dam in South Australia and Candelaria in Chile.
The Rover Mineral Field is interpreted as a southern repeat of the Tennant Creek Mineral Field, which has historically produced ~157 t Au, ~345,000 t Cu, ~14,000 t Bi, ~220 t Se and ~56 t Ag from 130 mines.
Mineral resources
Rover 1 carries an updated JORC Mineral Resource of 7.86 Mt (October 2025) — a 41% uplift on the previous estimate, spanning gold, copper, bismuth, cobalt and silver across indicated and inferred material.
Explorer 108 and Explorer 142 add separate defined resources that broaden the project from a single deposit into a wider mineral field opportunity.
Exploration
The project area is underexplored outside the current resources. Because the entire area sits beneath cover, Castile uses high-resolution geophysics and Ambient Noise Tomography to define drill targets with more confidence.
Deposit pathways
The IOCG deposit that anchors the project. Five revenue streams and a June 2026 study valuing it at A$1.6B pre-tax NPV (8%) — the full study numbers, revenue mix and mineral inventory are on the page.
Open page Explorer 108 + 142Two defined resources beyond Rover 1 — polymetallic Zn-Pb-Ag with a copper blanket at Explorer 108, and a compact high-grade Cu-Au IOCG at Explorer 142.
Open page