CASTILE RESOURCESInvestor PresentationProjects · Rover Mineral Field
The Rover Mineral Field covers 1,054 km² about 75 km south-west of Tennant Creek, adjacent to the Tennant Creek Mineral Field, one of the richest copper-gold fields in the world. Rover 1 is the flagship: a development-ready gold-copper deposit with bismuth, cobalt and magnetite alongside. Explorer 108 and Explorer 142 are the field's other defined deposits, with over 100 IOCG targets still to test.
Inside the field
A high-grade IOCG gold-copper-bismuth-cobalt-magnetite deposit about 75 km west-southwest of Tennant Creek. The 2026 Scoping Study values it at A$1.07B pre-tax NPV8 as a 750 ktpa underground operation over an 11-year initial mine life, with a Bankable Feasibility Study due later in 2026.
Open Explorer 108 & 142 · Rover Mineral FieldExplorer 108 is an 11.8 Mt zinc-lead-silver deposit with a separate copper blanket, about 40 km west of Rover 1. Explorer 142 is a compact high-grade copper-gold IOCG. Beyond them, over 100 targets across the 100%-owned field are being worked through with passive seismic surveys.
OpenRover 1 at a glance
Value, scale and how long it runs. Rover 1 carries the full study: the base case against the upside case, production and cashflow, the Mineral Resource by category, and the cautionary statement that goes with a scoping study.
Sources: “Updated 2026 Rover 1 Scoping Study Produces Outstanding Results”, ASX:CST, 28 August 2026 · Mineral Resource update, ASX:CST, 20 October 2025.
Location
The field 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 magnetite across Indicated and Inferred material.
Explorer 108 (11.8 Mt zinc-lead-silver with a separate copper blanket) and Explorer 142 (a compact high-grade copper-gold IOCG) add separate defined resources that broaden the field from a single deposit into a district.
Exploration
The field is underexplored outside the current resources. Because the entire area sits beneath cover, Castile uses high-resolution geophysics and Ambient Noise Tomography (passive seismic) to work through more than 100 IOCG targets and rank them for drilling.
Other exploration