Aspiring gold producer Maritana Minerals has delivered another significant milestone, tabling a maiden ore reserve for its Rose Hill gold project near the historic gold mining centre of Coolgardie, 25 kilometres southwest of Kalgoorlie and 70km southwest of the company's developing Black Swan gold processing hub in Western Australia.
The newly declared reserve stands at a proven and probable 420,000 tonnes grading a healthy 2.34 grams per tonne (g/t) gold for 31,600 ounces, calculated at a 1.3g/t gold cut-off grade. It will form an important first step in building a stream of ore for the company's Black Swan hub.
The Rose Hill reserve is part of a larger estimated mineral resource of 811,000 tonnes containing 94,000 ounces of gold. That resource is split between a lower-grade open pit component of 287,000 tonnes at 1.99g/t gold and a richer underground portion of 524,000 tonnes running an impressive 4.49g/t gold.
A prefeasibility study on the project, based on a gold price of A$4500 per ounce, has shown it would generate a positive cash flow. The proposed underground operation would be accessed via a corkscrew-style decline, employing a pillar mining method.
The maiden reserve adds another building block to Maritana’s development pipeline as it targets becoming a 100,000-ounce-per-annum gold producer. The company’s strategy hinges on refurbishing its Black Swan plant to process ore from its suite of satellite deposits scattered across the company's vast 1167-square-kilometre landholding. Almost all of its resources lie within a 100km radius of Kalgoorlie, including the Coolgardie region.
Maritana Minerals managing director and chief executive officer Grant Haywood said: “Declaring a maiden Ore Reserve for the Rose Hill Underground is a significant milestone for Maritana and lifts our Ore Reserve inventory to 236 koz. It confirms that Rose Hill stands up economically and moves the Project a meaningful a step closer to development.”
With a front-end engineering and design study now complete, Maritana has boosted the planned throughput capacity at the Black Swan hub from 2.2 million tonnes to 2.5 million tonnes per annum. The company is targeting the start of plant construction in the third quarter of 2026, with first gold production slated for the second half of 2027.
Underpinning this aggressive development timeline is a formidable balance sheet. Following a successful A$175 million placement, Maritana found itself sitting in a pool of cash A$229 million deep, with no debt, as of 30 June 2026, giving it a bulletproof kitty with which to bring Black Swan into production.
While development is the primary focus, the company has not taken its foot off the exploration pedal. At its Burbanks gold project, the company's phase-one diamond drilling program recently returned some spectacular high-grade hits, including a 4.2-metre intersection grading 42.43g/t gold from 289.63m. That intercept contained a bonanza-grade core of 1.37m going a stunning 126.93g/t gold.
A second phase of drilling is now underway at Burbanks, designed to test the mineralised lodes to a depth of 450m, well below the current 250m depth, suggesting management sees plenty of potential for the system to continue.
In addition to the blue-sky exploration at Burbanks, Maritana has launched a massive 60,000m reverse circulation drilling campaign across its Boorara, Coote, Gordons Dam and Crake projects. This program represents the less glamorous but critical work of steadily converting inferred resources into the higher-confidence indicated and eventually higher-level categories to shore up future operational planning for the Black Swan hub.
With a maiden ore reserve now in the bag for Rose Hill, a processing hub fully funded for development and drill rods turning to both define and expand its resource base, Maritana looks to be methodically checking off the hurdles and the ounces on its journey from explorer to producer.
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By Doug Bright
